WO2019039780A1 - User identification device and method using radio frequency radar - Google Patents

Abstract

A user identification device according to a disclosed embodiment includes: a transmitter which scatters a radio frequency signal into tissue of a user body part; a receiver which receives a radio frequency signal that has passed through the tissue of the user body part; memory which stores parameters of a trained classification algorithm; and a processor which, upon reception of the radio frequency signal through the receiver, analyzes the received radio frequency signal by means of the trained classification algorithm by using the parameters of the trained classification algorithm, and identifies a user.

Description

User identification device and method using radio frequency radar

This disclosure relates to user identification, and more particularly, to a user identification device and method using a Radio Frequency (RF) radar.

Techniques for obtaining biometric data of a user using radio frequency (RF) radar are known in the art.

For example, in US patent application US 2016054792 Al entitled " Radar-Based Biometric Recognition ", published February 25, 2016, the technology for measuring biometric characteristics It is impossible to identify the user with the biometric characteristic measured in the present invention.

A method and device for measuring biometric data using UWB radar, published March 31, 2016, is described in U. S. Patent Application No. US2016089052 A1, entitled " Method and device for measuring biometric data using UWB radar & Although techniques for collecting biometric data using a radar have been disclosed, it is not possible to identify a user with the biometric data collected in this invention.

There is a need for a user identification technique that is easy to identify the user and difficult to counterfeit the user identification information.

According to one embodiment, there is provided a device and method for obtaining a user ' s biometric data using a radio frequency radar and identifying a user based on the obtained biometric data of the user.

It is possible to perform consecutive user identification that allows the user to provide the identified information at any time and to perform continuous authentication capable of preventing spoofing without additional security.

These and other aspects, features, and advantages of the present disclosure will become more apparent from the following detailed description, taken in conjunction with the accompanying drawings.

1 is a schematic diagram of a user identification device according to one embodiment.

Figure 2 is an example of RF signals passing through a user's wrist tissue in accordance with a plurality of gestures of a user.

Figure 3 is an example of RF signals passing through the tissues of different people's wrists according to a plurality of gestures of different persons.

4 is a block diagram of a user identification device in accordance with one embodiment.

5 is a block diagram of a user identification device according to another embodiment.

6 is an example of the arrangement of components included in the user identification device shown in Fig.

7 is another example of the arrangement of components included in the user identification device shown in Fig.

8 is a configuration diagram of a user identification device according to another embodiment.

9 is a flowchart illustrating an operation of a method for identifying a user according to an exemplary embodiment of the present invention.

10 is a flowchart of a training process of a classification algorithm in a user identification method according to an exemplary embodiment.

11 is a flowchart illustrating an operation of a user identification method according to another embodiment.

12 is a flowchart of a training process of a classification algorithm in a user identification method according to another embodiment.

13 is a flowchart illustrating an operation of a user identification method according to another embodiment.

14 is a flowchart illustrating an operation of a user identification method according to another embodiment.

15 is a flowchart illustrating an operation of a user authentication method based on a result of user identification according to an embodiment.

A user identification device using a radio frequency (RF) radar according to one embodiment of the present disclosure includes: a transmitter for transmitting a radio frequency signal to a body part of a user; A receiver for receiving a radio frequency signal transmitted from a transmitter and passed through a body part of a user; A memory for storing parameters of a classification algorithm trained for a radio frequency signal that has passed through the body part of the user; And a processor for analyzing the radio frequency signal received by the training classification algorithm using parameters as the radio frequency signal passed through the body part is received via the receiver to identify the user.

Also, a user identification method using a radio frequency (RF) radar in accordance with an embodiment of the present disclosure includes generating radio frequency signals by a transmitter of the device and scattering the generated radio frequency to a body part of the user; Receiving a radio frequency signal that has passed through a body part of a user by a receiver of the device; Identifying the user by analyzing the radio frequency signal received by the trained classification algorithm running on the processor of the device using the parameters of the trained classification algorithm as the radio frequency signal passed through the body part of the user is received .

The computer-readable recording medium according to an embodiment of the present disclosure may be a computer-readable recording medium having recorded thereon a program for executing the above-described method.

The various embodiments disclosed herein will be described in more detail with reference to the corresponding attached drawings. However, the technical features of the present disclosure can be implemented in various forms, and are not limited to the structures and functions described in this disclosure. The embodiments disclosed herein are described in order to explain the present disclosure in more detail. It will be apparent to those skilled in the art that the technical features of this disclosure support the embodiments disclosed herein either independently or in combination with other embodiments. For example, the methods or devices disclosed herein may be provided by combination of any number of the embodiments disclosed herein. The embodiments described herein may be implemented by one or more elements of the claims. That is, portions of an embodiment different from one embodiment of the present disclosure may be combined with one another to enable operation of the device.

The terminology and language used in the following description and claims are not limited in their descriptive sense, but may be used merely by the inventors to provide a clear and consistent understanding of the disclosure. It is therefore to be understood by those of ordinary skill in the art that the following description of various embodiments of the disclosure is provided for illustrative purposes only.

As used in the specification, the term " an embodiment " is used herein to mean " serving as an example or illustration. &Quot; Embodiments disclosed herein as " one embodiment " are not necessarily to be construed as preferred over other embodiments. It is to be understood that, unless the context clearly indicates otherwise, the singular forms as used in this disclosure include plural forms.

It is also to be understood that the term " comprises, " " comprising " when used in this disclosure should be taken to denote the presence of defined features, values, operations, components and / Values, operations, components, and / or groups thereof.

1 is a schematic diagram of a user identification device 100 according to one embodiment. The user identification device 100 shown in Fig. 1 comprises a device worn on the wrist of the user 110, but the user identification device 100 of the present disclosure is not limited thereto. For example, the user identification device 100 of the present disclosure may comprise a wearable device at a body part of the user 110, such as the head, neck, nose, ear, waist, ankle, and body of the user 110 .

Accordingly, the user identification device 100 can be represented as a wearable device having a user identification function. A wearable device may be a device based on an apparel-based device such as, for example, a glove, a suit, a shirt, pants and a hat, or a device based on an accessory such as a glasses, a wristband, a bracelet, a bracelet, a watch, a necklace, But are not limited to.

When the user 110 wears the user identification device 100, the user identification device 100 scatters the RF signals into the tissue of the wrist of the user 110. The organization of the wrist of the user 110 may represent the body part of the user 110. The scattered RF signals may be in an ultra-wideband signal, for example, in the range of 1 to 15 GHz, but are not limited thereto. Scattering of the RF signals may indicate scattering of the UWB signal. Scattering the RF signals may indicate emitting RF signals.

The user identification device 100 receives RF signals that have passed through the wrist tissue of the user 110. The user identification device 100 may obtain the parameters by training a classification algorithm for RF signals received for a period of time to store the user 110. [ The classification algorithm can be applied to a neural network of any architecture, logistic regression, decision tree, support vector machine, K nearest neighbor method, neighbors, Naive Bayesian classifiers, or any combination of the classification algorithms described above. The classification algorithm may be referred to as a classifier or classification means. The parameters obtained by training the classification algorithm include reference values, parameters, or information used to classify RF signals for user 110 from received RF signals. The parameters obtained through training of the classification algorithm are thus used to analyze the received RF signal to identify the user 110. The user identification device 100 may collect RF signals that have passed through the wrist tissue of the user 110 for a period of time and may train the classification algorithms on the collected RF signals to obtain parameters.

The user identification device 100 may train the classification algorithms for the RF signals received at each of the plurality of gestures of the user 110 to obtain the parameters. The user identification device 100 stores the parameters obtained by training the classification algorithm in the user identification device 100 and analyzes the RF signals passed through the body part of the user 110 by the trained classification algorithm, And reads and uses the parameters stored in the memory 100.

FIG. 2 is an example of RF signals passing through the wrist tissue of a user 110 according to a plurality of gestures of a user 110. FIG. The RF signals shown in FIG. 2 may be referred to as RF signals that have passed a particular body part according to a plurality of gestures of a particular body part of the user 110.

2, a plurality of gestures of the user 110 may include, for example, a gesture 1 indicating a state in which the hand of the user 110 is neutral, A gesture 3 indicating a hand of the user 110 is down; a gesture 4 indicating a hand of the user 110 moving in a left direction; And a gesture 5 indicating that the hand of the user 110 has moved in the right direction. However, the plurality of gestures of the user 110 are not limited thereto.

Referring to FIG. 2, RF signals passing through the wrist of the user 110 according to each gesture of the user 110 are distorted differently. The distortion of the RF signals is represented, for example, by attenuation of the RF signal (change in amplitude) and phase shift of the RF signal. The user identification device 100 may identify the user or identify the user and the user gesture based on the RF signals that have passed through the wrist of the user 110 corresponding to each gesture of the user 110. [

As the user gesture is identified, the user identification device 100 may perform an action according to each user gesture or transmit a command according to each user gesture to the external device 120. [ The user identification device 100 may set different user commands, different authentication ranges, and / or different control ranges, for example, for different user gestures.

For example, if the user gesture indicates that the smart home 120-1 is unlocked by a signal transmitted from the user identification device 100 to the smart home 120-1 when the hand of the user 110 indicates a neutral state, the user identification device 100 may set information about the user gesture so that the user gesture is unlocked. The smart car 120-2 is unlocked by a signal transmitted from the user identification device 100 to the smart car 120-2 in the case where the user gesture indicates that the user 110 is in the raised state, (100) can set information about the user gesture.

In addition, when the user gesture indicates that the hand of the user 110 has moved to the right direction, a signal transmitted from the user identification device 100 to the smart IoT (Internet of Things) The user identification device 100 can set information about the user gesture such that the power of the device 120-3 is turned on. The smart IoT device 120-3 is activated by a signal transmitted from the user identification device 100 to the smart IoT device 120-3 in the case where the user gesture indicates that the hand of the user 110 has moved leftward. The user identification device 100 may set information about the user gesture so that the power of the user gesture is turned off.

When the user gesture indicates that the hand of the user 110 is down, the user for payment in the smartphone 120-4 by the signal transmitted from the user identification device 100 to the smartphone 120-4, The user identification device 100 may set information about the user gesture such that the authentication process is performed.

Setting different user commands, different control ranges, and / or different authentication ranges for the different user gestures mentioned in this disclosure is not limited to the one just described.

Figure 3 is an example of RF signals passing through the tissues of different people's wrists according to a plurality of gestures of different persons. Figure 3 is an example of RF signals passing through the tissue of each user's wrist in accordance with the five user gestures (or wrist gestures) shown in Figure 2 of three people. Referring to FIG. 3, it can be seen that the RF signals passing through the tissue of the same body part for each person and each gesture are distorted differently.

The RF signals passing through the tissue of the same body part of different people according to the examples of the RF signals shown in Fig. 3 are distorted differently, and when the tissue of the body part moves according to the user gesture, It can be seen that the RF signals are distorted differently according to the user gesture. This is because even though the same body part is different for each person, the tissues such as muscles and tendons of the body parts are different from each other. In addition, depending on each gesture, the positions of the muscles and tendons of the body part may be changed, and the RF signals passing through the tissue of the body part may be distorted according to the changes of such muscles or tendons. For example, the positions of the muscles and tendons of the human 1's wrist may be different for the gesture 1, the gesture 2, the gesture 3, the gesture 4, and the gesture 5 of Person 1, respectively.

Thus, the RF signals that have passed through the tissue of the body portion of each person can be recognized as the unique biometric data of each person, so that the user identification device 100 is based on the RF signal passed through the tissue of each person ' Thereby identifying the user. In the present disclosure, user identification may be referred to as biometric user identification or biometric user authentication. The biometric user authentication in this disclosure refers to confirming the access qualification of the user 110 to the external device 120 based on the biometric data (RF signals) obtained by the user identification device 100. [

In this disclosure, a user gesture can be used as a user's authentication key. A plurality of user gestures may be defined in advance. Thus, a plurality of user gestures may be referred to as predefined gestures or predefined calibration gestures.

After storing the parameters of the trained classification algorithm, the user identification device 100 may transmit RF signals to the wrist organization of the user 110, if the user 110 rewrites or worn the user identification device 100 And receives an RF signal that has passed through the wrist tissue of the user 110. The user identification device 100 analyzes the received RF signals using parameters of the trained classification algorithm and identifies the user 110 and / or identifies a user gesture.

The user identification result obtained by the user identification device 100 may indicate whether the user 110 is an owner of the user identification device 100. [ The user identification device 100 may transmit the user identification result to the external device 120. [ The result of the user identification transmitted to the external device 120 may indicate a positive user identification result. The positive user identification result may indicate that the user 110 is the owner of the user identification device 100. The user identification result transmitted from the user identification device 100 to the external device 120 may include the identified user information (e.g., authentication information).

The user identification result indicating that the user 110 is not the owner of the user identification device 100 may represent a negative user identification result. If the user identification result is negative, the user identification device 100 may not transmit the user identification result to the external device 120. If the user identification result indicates that the user 110 is not the owner of the user identification device 100, the user identification device 100 may determine that the user 110 wearing the user identification device 100 has access to the external device 120 To prevent it.

The user identification device 100 may request the external device 120 to allow the user 110 to access the external device 120 if the user identification result indicates that the user is the owner of the user identification device 100 . The fact that the access to the external device 120 is permitted means that the user 110 wearing the user identification device 100 can not access the smart home 120-1 ), It can indicate that the door lock is released.

The fact that access to the external device 120 is allowed means that when the user 110 wearing the user identification device 100 is connected to the smart car 120 -2), it may indicate that the smart car 120-2 is unlocked. The fact that the access to the external device 120 is allowed means that the user 110 wearing the user identification device 100 in the case where the external device 120 is the smart car 120-2 is the smart car 120-2, The smart car 120-2 can set the operating conditions of the personalized smart car 120-2 to the user 110. [

Access to the external device 120 is permitted when the user 110 wearing the user identification device 100 is in the home and the temperature of the home, lighting, music volume, As shown in FIG. Allowing access to the external device 120 may indicate unlocking a smart device, such as a smart phone, tablet, or TV, without a fingerprint or iris scan. Allowing access to the external device 120 may indicate that a personalized ticket for various events is issued or that the payment system is easily accessible without performing additional authentication procedures.

Thus, the user 110 does not perform an operation to authenticate the user 110, for example, an iris scan, a fingerprint scan, a PIN code input, a password input, The user authentication procedure can be performed in all applications requiring authentication to the user. Accordingly, the user 110 can connect to the event requiring various authentication only by wearing the user identification device 100 without performing an additional authentication procedure, and can provide an ID (Identification) certificate for authenticating the user 110 You do not need to show.

The user identification device 100 may store parameters of a trained classification algorithm for a plurality of users and may set the same or different access ranges for a plurality of user-specific external devices 120. For example, in the case of storing the parameters of the trained classification algorithm that can identify user 1, user 2, and user 3, respectively, the user identification device 100 may be used by user 1, user 2, It is possible to unlock the smart home 120-1 and set the access range for the external device 120 so that the user 1 can unlock the smart car 120-2. In addition, the user identification device 100 may set an access range for the external device 120 to access different payment systems for each of the users 1, 2, and 3.

As described above, the application can be used in all applications requiring user authentication by the user identification device 100 according to the present disclosure without performing an additional authentication procedure. User authentication in all applications may be performed based on user identification results performed in accordance with the present disclosure. Identification and authentication of the user 110 may be performed continuously while the user 110 is wearing the user identification device 100. [

  The user identification device 100 according to the present disclosure can be used when accessing various electronic services when accessing various devices such as, for example, mobile phones, smart phones, computers, etc., It can be used for unlocking various smart devices.

The user 110 need not perform a login or unlock operation every time an attempt is made to access a device, network or payment system by the user identification device 100 according to the present disclosure. Further, the user identification device 100 according to the present disclosure allows the user 110 to perform continuous authentication, which can be spoofing proof without additional security. This is because the user identification device 100 according to the present disclosure uses the biometric data of the user 110 to identify the user. The user identification device 100 according to the present disclosure allows the user 110 to register the identity of the user only once without having to re-login in the IoT network environment and to perform seamless access have.

The external device 120 shown in FIG. 1 may be any device that provides accessible electronic devices for user authentication or any device that is accessible through user authentication. The external device 120 may include an external user authentication device. The external device 120 may include a smart home 120-1, a smart car 120-2, an IoT device 120-3, and a smartphone 120-4, as shown in FIG. 1 But is not limited thereto. For example, the external device 120 may further include a billing system, a device capable of notifying the occurrence of an event. Events may include, but are not limited to, events related to purchases, such as, for example, purchase of items, purchase of tickets, and the like.

4 is a block diagram of a user identification device 400 in accordance with one embodiment.

4, the user identification device 400 includes a transmitter 410, a receiver 420, a processor 430, and a memory 440, but the components of the user identification device 400 are not limited thereto . For example, the user identification device 400 may further include a user interface 450.

Transmitter 410 may generate an RF signal and scatter the RF signal generated by the user's body part. The transmitter 410 may be controlled by the processor 430 to generate an RF signal and scatter the RF signal generated by the user's body part. The transmitter 410 may generate an RF signal and scatter the RF signal generated by the user's body part, if the user wears the user identification device 400, regardless of the control of the processor 430. [

Whether or not the user wears the user identification device 400 is detected by a sensor not shown in the user identification device 400 and the sensed result is transmitted to the transmitter 410 to enable the operation of the transmitter 410 enable). The result sensed by the sensor is sent to the processor 430 and the processor 430 can control the operation of the transmitter 410 based on the sensed result. Determining whether a user has worn the user identification device 400 may follow, but is not limited to, user input indicating wear of the user identification device 400. [ A user input indicating wear of the user identification device 400 may include a user input that turns on the power of the user identification device 400. [

The transmitter 410 may scatter an ultra-wideband RF signal of 1 to 15 GHz, but the frequency band of the scattered RF signal is not limited thereto. Transmitter 410 may include a transmit antenna that scatters the RF signal.

Receiver 420 receives an RF signal that has passed through the body part of the user. Receiver 420 may receive an ultra-wideband RF signal that has passed through the body part of the user. The receiver 420 may include a receive antenna or a receive sensor for receiving an RF signal that has passed through the body portion of the user. Receiver 420 may be controlled by processor 430 to receive an RF signal. The receiver 420 may be enabled for operation of the receiver 420 by a signal sensed from a sensor (not shown) that senses whether the user identification device 400 is worn. The processor 430 may control the operation of the receiver 420 by a signal sensed by the sensor.

The processor 430 trains the RF signals received via the receiver 420 by a classification algorithm and obtains the parameters of the trained classification algorithm. The processor 430 stores the obtained parameters in the memory 440. After storing the parameters in the memory 440, the processor 430 reads the parameters stored in the memory 440 as the RF signals are received via the receiver 420 and analyzes the RF signals received by the trained classification algorithm Identify the user.

When the processor 430 obtains the parameters of the classification algorithm, it may request the user through the user interface 450 for at least one predefined user gesture. The user interface 450 may be configured to have a function to receive user input and output information, such as a touch screen. The user interface 450 may be configured to request the user to at least one user gesture controlled by the processor 430 and predefined as an audio signal and / or a video signal.

The processor 430 may output the user identification result via the user interface 450. The user identification result output through the user interface 450 may have an alarm form, a character form, and / or an image form, but is not limited thereto. The alarm form can be represented by an audio signal or / and light. The user identification result output through the user interface 450 may indicate the completion of the identification operation or the identification operation. The user identification result output through the user interface 450 may indicate whether the user wearing the user identification device 400 is the owner of the user identification device 400. [

The user interface 450 may be a user interface of the wearable device when the user identification device 400 is incorporated into a wearable device that the user wears. The processor 430 may be a processor of the wearable device when the user identification device 400 is integrated into a user wearable wearable device. The processor 430 may be referred to as a central processing unit that controls the overall functionality of the user identification device 400.

The memory 440 may store parameters obtained according to the training of the classification algorithm for the received RF signals. The memory 440 may be configured to train the classification algorithm for the RF signals on which the user identification device 400 is received in accordance with this disclosure as it is recognized that the user has worn the user identification device 400, And may include a program and / or application that includes one or more instructions that can be obtained, used to identify the user using the obtained parameters, and to perform the process of using or transmitting the identification results of the user. The memory 440 may store an RF signal received via the receiver 420 for a predetermined period of time. Processor 430 may read the RF signals stored in memory 440 to train the classification algorithm to obtain parameters.

The memory 440 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory), a RAM (Random Access Memory), SRAM (Static Random Access Memory), ROM (Read Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), PROM (Programmable Read-Only Memory) A disk, and / or an optical disk.

The processor 430 may execute programs and / or applications stored in the memory 440 to perform the user identification method in accordance with the present disclosure. The processor 430 may include a converter that converts the RF signal received from the receiver 420 into a digital signal. If processor 430 does not include a transducer as described above, receiver 420 may include a transducer that converts the received RF signals into a digital signal.

The user identification device 400 shown in FIG. 4 may be configured to further include various sensors such as an Accelerometers sensor, a Gyroscopes sensor, a Magnetometers sensor, and the like. When the user identification device 400 further includes the various sensors described above, the user identification device 400 can use the sensed results through the various sensors described above to more accurately identify the user gesture and / or user have.

5 is a block diagram of a user identification device 500 according to another embodiment. 5, a user identification device 500 includes a transmit antenna 101, a receive antenna 102, a transmitter 103, a receiver 104, an analog-to-digital converter 105, a memory 106, 107). The RF radar in the present disclosure may include a transmit antenna 101, a receive antenna 102, a transmitter 103, a receiver 104, and an analog-to-digital converter 105. The processor 107 may be configured and operated with the processor 430 shown in FIG. The memory 106 may be configured and operated as the memory 440 shown in FIG.

5, the user identification device 500 includes one transmit antenna 101, one receive antenna 102, one transmitter 103, one receiver 104, and one analog-to-digital converter (ADC) And includes a plurality of transmit antennas 101, a plurality of receive antennas 102, a plurality of transmitters 103, a plurality of receivers 104 and a plurality of ADCs 105 . The receiving antenna 102 shown in FIG. 5 may be configured as a receiving sensor. The transmit antenna 101 and the receive antenna 102 may be disposed adjacent to the transmitter 103 and the receiver 104, respectively.

In FIG. 5, the processor 107 includes a memory 106. The memory 106 may be separate from the processor 107. The memory 106 may comprise any type of computer-writable storage device and / or any computer-writable storage medium. The memory 106 stores the parameters of the trained classification algorithm. The memory 106 may be configured as the memory 440 shown in FIG. If the processor 107 is an external processor of the user identification device 500, the digital signal output from the ADC 105 may be transferred to an external processor. The external processor may be, but is not limited to, a processor of the device in which the user identification device 500 is integrated.

The transmitting antenna 101 may be coupled to the transmitter 103 and the receiving antenna 102 may be coupled to the receiver 104. The transmitting antenna 101 may scatter the UWB signals. The receive antenna 102 may receive ultra-wideband signals. The transmit antenna 101 and the receive antenna 102 may be disposed across a user's body part and disposed within the user identification device 500 when the user wears the user identification device 500, It is not limited.

6 is an example of the arrangement of components included in the user identification device 500 shown in FIG. Referring to FIG. 6, an example in which the user identification device 500 is integrated into the watch 60 is shown. Thus, in the case of FIG. 6, the watch 60 incorporating the user identification device 500 can be worn on the wearer's wrist 61. In the case of FIG. 6, the transmitting antenna 101 and the receiving antenna 102 are disposed inside the watch 60 and opposite to each other when the user wears the watch 60.

Devices in which the user identification device 500 may be integrated in this disclosure are not limited to the watch 60. The device from which the user identification device 500 may be integrated may include the device referred to in Fig. Depending on the device into which the user identification device 500 is integrated, the location and number of the transmit antenna 101 and the receive antenna 102 may be determined.

FIG. 7 is another example of the arrangement of the components included in the user identification device 500 shown in FIG. Referring to FIG. 7, the transmitting antenna 101 and the receiving antenna 102 are arranged as shown in FIG. 6, but the transmitter 103 and the receiver 104 may be disposed adjacent to each other. The transmitter 103 and the receiver 104 may be configured as an integrated transceiver.

  When the user wears the user identification device 500, the transmitter 103 generates ultra-wideband signals and scatters ultra-wideband signals to the tissues of the user's body part by the transmission antenna 101. [ The transmitter 103 may be configured to operate in the range of 1 to 15 GHz.

The scattered ultra-wideband signal passes through the tissue of the user's body part. At the same time, the tissues of the user's body part distort the UWB signal. Distortions of the received ultra-wideband signal are represented, for example, by attenuation (change in amplitude) of the RF signal and phase shift of the RF signal. The receiver 104 is thus distorted to receive signals passing through the body part of the user.

The ADC 105 is connected to the receiver 104. The ADC 105 converts the signals received by the receiver 104 into digital signals provided to the processor 107. The processor 107 analyzes the received digital signals using the parameters of the trained classification algorithm stored in the memory 106 to identify the user.

The processor 107 trains the classification algorithm stored in the memory 106 for the received RF signal to obtain parameters for identifying the user and stores the obtained parameters in the memory 106. [ After storing the parameters in the memory 106, the processor 107 reads the parameters stored in the memory 106 and analyzes the received RF signals by a trained classification algorithm to obtain a user identification result. The analysis of RF signals by the trained classification algorithm using parameters of the trained classification algorithm uses techniques known in the art.

Optionally, the processor 107 may perform pre-processing before analyzing the received RF signals. The preprocessing is performed by a method such as averaging, moving average, moving median, etc., scaling of signal values within the entire frequency range, wavelet transform, Fourier transform, Taking the logarithm, exponent, exponentiation, multiplication / division by a constant, subtraction / addition of a constant, differentiation, integration, etc. From the resulting data set, such as various mathematical transformations on the received data, signal transforms and inverse transforms from complex numbers to amplitude phase representations, data sets obtained with errors as a result of interference, calculation errors, etc., outliers " of the received digital signal. Since the preprocessing operation is well known in the art, no detailed description is required. The user identification device 500 may be configured such that the above-described pre-processing is performed between the ADC 105 and the processor 107. [ In addition, the above-described preprocessing can also be performed on the received RF signals to train the classification algorithm.

8 is a configuration diagram of a user identification device 800 according to another embodiment.

Referring to FIG. 8, the user identification device 800 further includes a communication interface 108 to the user identification device 500 of FIG. The communication interface 108 may be referred to as an auxiliary transmitter. The communication interface 108 may transmit the user identification result to the external device 120 shown in FIG. The communication interface 108 can transmit the digital signal output from the ADC 105 to the external device 120. [ If the processor 107 is an external processor of the user identification device 800, the digital signal output from the ADC 105 may be transferred to an external processor.

The communication interface 108 can transmit and receive data based on local communication with the external device 120. [ The near field communication may be, for example, a Bluetooth communication, a Bluetooth low energy (BLE) communication, a near field communication, a WLAN communication, a Zigbee communication, an infrared data association (IrDA) But is not limited to, WFD (Wi-Fi Direct) communication, UWB (ultra wideband) communication, Ant + communication, and the like. For example, the communication interface 108 may be configured based on wired communication. The communication interface 108 may transmit data received from the external device 120 to the processor 107. The processor 107 may send user information stored in the memory 106 to the external device 120 via the communication interface 108 based on data received from the communication interface 108. [ The processor 107 may transmit the user identification result to the external device 120 via the communication interface 108 based on the data received from the communication interface 108. [ The user identification result transmitted to the external device 120 through the communication interface 108 may include a user identification result that can be output through the user interface 450 of FIG.

9 is a flowchart illustrating an operation of a method for identifying a user according to an exemplary embodiment of the present invention. The user identification method shown in FIG. 9 may be performed by the user identification devices 400, 500, 800 shown in FIGS. 4 to 8 based on the user identification device 100 shown in FIG. 1 .

In step S910, the user identification device 100 generates RF signals and scatters the generated RF signals into the body part of the user 110. [ For example, the user identification device 100 generates RF signals at the transmitter 103 and scatters the generated RF signals via the transmit antenna 101 to the user's body part. The RF signal scattered into the user's body part is not limited to the frequency band of the ultra-wideband signal of 1 to 15 GHz or the scattered RF signal. The user identification device 100 may perform step S910 if the user 110 wears the user identification device 100. [ Determining whether the user 110 wore the user identification device 100 can be performed as described in Fig. Step S910 is performed after the user identification device 100 stores the parameters obtained by training the RF signal passed through the body part of the user by the classification algorithm.

In step S920, the user identification device 100 receives RF signals that have passed through the user body portion. For example, the user identification device 100 receives RF signals that have passed through the user's body part via the receive antenna 102 or the receive sensor. When the RF signal scattered from the user identification device 100 is an ultra-wideband signal of 1 to 15 GHz, the received RF signal is an ultra-wideband signal of 1 to 15 GHz.

In step S930, the user identification device 100 identifies the user by analyzing the RF signals received by the trained classification algorithm using the parameters of the stored trained classification algorithm. Analyzing the RF signal received by the trained classification algorithm may be used to classify received RF signals using parameters and to identify whether the classified RF signal corresponds to an RF signal that has passed through the body part of the user have. When the classified RF signal corresponds to an RF signal that has passed through the body part of the user, the user identification device 100 determines whether the user wearing the user identification device 100 is the user identification device 100 .

10 is a flowchart of a training process of a classification algorithm in a user identification method according to an exemplary embodiment. FIG. 10 may be performed before performing the user identification method shown in FIG. 9, but is not limited thereto. Figure 10 may be performed when a user first wears the user identification device 100. [ 10 may be performed for each of a plurality of users. 10 may be performed for a plurality of users, the user identification device 100 may identify a plurality of users. 10 may be performed for each of a plurality of gestures of a user. A user may register at least one gesture among a plurality of gestures as a unique signature of the user.

In step S1010, the user identification device 100 generates RF signals when the user's body part performs a gesture, and scatters the generated RF signals to the user's body part. In step S1010, the user identification device 100 may detect whether the user 110 wears the user identification device 100 and then detect whether the user 110 performs the gesture. To this end, the user identification device 100 may utilize a sensor included in the user identification device 100. [ The user identification device 100 may request the user to predefine the user gesture before performing step S1010. A method of requesting a user for a user gesture can be performed using the user interface 450 as described in FIG.

In step S1020, the user identification device 100 receives RF signals that have passed through the body part of the user. In the case where the RF signals scattered in step S1010 are ultra-wideband signals of 1 to 15 GHz, the received RF signals are ultra-wideband signals of 1 to 15 GHz distorted as they pass through the user's body part.

In step S1030, the user identification device 100 trains the received RF signals with a classification algorithm to obtain the parameters of the trained classification algorithm. The obtained parameters include reference values, parameters or information for classifying the RF signals received by the training classification algorithm into RF signals corresponding to user and / or user gestures.

In step S1040, the user identification device 100 stores the obtained parameters. When storing the parameters, the user identification device 100 may further store the additional information so that at least one of the plurality of gestures or each of the plurality of gestures may be registered as a unique signature of the user. The stored additional information may indicate that the user gesture identified by the stored parameters is registered with the user's unique signature.

11 is a flowchart illustrating an operation of a user identification method according to another embodiment. Steps S1110, S1120, and S1140 shown in Fig. 11 are performed similarly to steps S910 to S930 of Fig. 9 described above.

In step S1130, the user identification device 100 converts the received RF signals into a digital signal. In step S1140, the user identification device 100 identifies the user by analyzing by a trained analysis algorithm for the RF signals converted into digital signals.

12 is a flowchart of a training process of a classification algorithm in a user identification method according to another embodiment. Steps S1210, S1220, S1240, and S1250 shown in Fig. 12 are performed similarly to steps S1010 to S1040 shown in Fig.

In step S1230, the user identification device 100 converts the received RF signals into digital signals. In step S1240, the user identification device 100 trains the RF signals converted into digital signals into a classification algorithm to obtain the parameters.

13 is a flowchart illustrating an operation of a user identification method according to another embodiment. FIG. 13 is an example in which a technical configuration for transmitting a user identification result to an external device is added to the operation flow chart of FIG. Steps S1310 to S1330 in Fig. 13 are performed similarly to steps S910 to S930 in Fig.

In step S1340, the user identification device 100 transmits the user identification result to the external device 120. [ The user identification device 100 may transmit the user identification result to the external device 120 via the communication interface 108 shown in Fig. The user identification device 100 may transmit the user identification result to the external device 120 in response to a request from the external device 120 via the communication interface 108. [ The user identification result may include user authentication information (e.g., user login information, user authentication password information). The user authentication information may be previously stored in the user identification device 100. [ The user identification result may be substituted for the user authentication information.

14 is a flowchart illustrating an operation of a user identification method according to another embodiment. FIG. 14 is an example of adding the feature of transmitting the user identification result and the identified user gesture to the external device, respectively, in the example shown in FIG. Steps S1410 and S1420 in Fig. 14 are performed similarly to steps S910 and S920 in Fig.

In step S1430, the user identification device 100 analyzes the RF signal received by the classified classification algorithm using the stored parameters to identify the user and the user gesture, respectively. The stored parameters may comprise information that can classify received RF signals by user and by user gesture.

In step S1440, the user identification device 100 transmits the result of identifying the user identification result and the user gesture to the external device 120 through the communication interface 108 in Fig. The user identification device 100 may transmit a result of identifying the user identification result and the user gesture to the external device 120 when a request is received from the external device 120 through the communication interface 108. [

15 is a flowchart illustrating an operation of a user authentication method according to an embodiment. Fig. 15 is operated on the basis of a device 1510, an external device 1520, and a payment system 1530 having a user identification function according to the present disclosure.

In step S1501, the device 1510 identifies the user using the RF signal according to the present disclosure. After the user is identified, the connection between the device 1510 and the external device 1520 is established (S1502), and the information input process based on the event is performed in the external device 1520 (S1503) (S1504), the device 1510 transmits the user identification information to the external device 1520 (S1505). The user identification information may include user authentication information stored in the device 1510, and user identification information may be used as user authentication information.

The information input process based on the event performed in step S1503 may include, for example, inputting information for issuing a ticket. For example, when the ticket is a train ticket, the information described above may include the departure information, the destination information, the boarding time information, and the passenger information. The above-described information input can be directly input by the user wearing the device 1510 using the external device 1520. [ For example, the external device 1520 may be a ticketing machine that is installed in a smartphone or a train station. Ticket issuing machine is a device having a communication function. When the external device 1520 is a smart phone, the above-described information input process can be performed based on the ticket issuing application executed by the external device 1520. [ Connection establishment between the device 1510 and the external device 1520 performed in step S1502 may be performed after the information input process is completed in step S1503 and when a user authentication request is performed in step S1504. The owner of the external device 1520 and the device 1510 may be the same, but may be different.

When the user identification information is received from the device 1510, the external device 1520 requests the payment system 1530 in step S1506 for a settlement process based on the user identification information. The payment system 1530 may be an Internet based payment server.

The payment system 1530 obtains information about the device 1510 based on the received user identification information and establishes a connection between the device 1510 and the payment system 1530 based on the acquired information about the device 1510 (S1507). To this end, the payment system 1530 may include a database that stores information that maps user identification information and information about the device 1510. The information about the device 1510 includes information that can be associated with the device 1510 based on a communication network such as the Internet.

When a connection is established with the device 1510, the payment system 1530 transmits a user authentication request for payment to the device 1510 in step S1508. Accordingly, in step S1509, the device 1510 transmits the user identification information to the payment system 1530. [ When the user identification information is received from the device 1510, the payment system 1530 performs payment processing based on the received user identification information. When the payment processing is completed, guidance information on completion of the payment processing is transmitted to the external device 1520 (S1510). Accordingly, the external device 1520 outputs a payment completion notification message to notify the user of the device 1510 of the completion of the payment. The payment system 1530 can transmit the payment completion guide information to the device 1510 when transmitting the payment completion guide information to the external device 1520. [ The external device 1520 can output the payment completion notification as an audio signal and / or a video signal.

The technical features of the present disclosure can be clearly described by the embodiments described in the specification and the accompanying drawings. It will be apparent to those skilled in the art that the technical features of the present disclosure can be modified and embodied by other embodiments without departing from the technical features of the present disclosure. It is therefore to be understood that the embodiments disclosed in the specification and the accompanying drawings are illustrative and not restrictive. Unless otherwise specified, an element disclosed in a single form in a claim does not exclude the presence of a plurality of such elements.

Meanwhile, the disclosed embodiments may be embodied in the form of a computer-readable recording medium for storing instructions and data executable by a computer. The command may be stored in the form of program code, and when executed by the processor, may generate a predetermined program module to perform a predetermined operation. In addition, the instructions, when executed by a processor, may perform certain operations of the disclosed embodiments. ≪ / RTI > Figure 3 is an example of RF signals passing through the tissue of each user's wrist in accordance with the five user gestures (or wrist gestures) shown in Figure 2 of three people. Referring to FIG. 3, it can be seen that the RF signals passing through the tissue of the same body part for each person and each gesture are distorted differently.

The RF signals passing through the tissue of the same body part of different people according to the examples of the RF signals shown in Fig. 3 are distorted differently, and when the tissue of the body part moves according to the user gesture, It can be seen that the RF signals are distorted differently according to the user gesture. This is because even though the same body part is different for each person, the tissues such as muscles and tendons of the body parts are different from each other. In addition, depending on each gesture, the positions of the muscles and tendons of the body part may be changed, and the RF signals passing through the tissue of the body part may be distorted according to the changes of such muscles or tendons. For example, the positions of the muscles and tendons of the human 1's wrist may be different for the gesture 1, the gesture 2, the gesture 3, the gesture 4, and the gesture 5 of Person 1, respectively.

Thus, the RF signals that have passed through the tissue of the body portion of each person can be recognized as the unique biometric data of each person, so that the user identification device 100 is based on the RF signal passed through the tissue of each person ' Thereby identifying the user. In the present disclosure, user identification may be referred to as biometric user identification or biometric user authentication. The biometric user authentication in this disclosure refers to confirming the access qualification of the user 110 to the external device 120 based on the biometric data (RF signals) obtained by the user identification device 100. [

In this disclosure, a user gesture can be used as a user's authentication key. A plurality of user gestures may be defined in advance. Thus, a plurality of user gestures may be referred to as predefined gestures or predefined calibration gestures.

After storing the parameters of the trained classification algorithm, the user identification device 100 may transmit RF signals to the wrist organization of the user 110, if the user 110 rewrites or worn the user identification device 100 And receives an RF signal that has passed through the wrist tissue of the user 110. The user identification device 100 analyzes the received RF signals using parameters of the trained classification algorithm and identifies the user 110 and / or identifies a user gesture.

The user identification result obtained by the user identification device 100 may indicate whether the user 110 is an owner of the user identification device 100. [ The user identification device 100 may transmit the user identification result to the external device 120. [ The result of the user identification transmitted to the external device 120 may indicate a positive user identification result. The positive user identification result may indicate that the user 110 is the owner of the user identification device 100. The user identification result transmitted from the user identification device 100 to the external device 120 may include the identified user information (e.g., authentication information).

The user identification result indicating that the user 110 is not the owner of the user identification device 100 may represent a negative user identification result. If the user identification result is negative, the user identification device 100 may not transmit the user identification result to the external device 120. If the user identification result indicates that the user 110 is not the owner of the user identification device 100, the user identification device 100 may determine that the user 110 wearing the user identification device 100 has access to the external device 120 To prevent it.

The user identification device 100 may request the external device 120 to allow the user 110 to access the external device 120 if the user identification result indicates that the user is the owner of the user identification device 100 . The fact that the access to the external device 120 is permitted means that the user 110 wearing the user identification device 100 can not access the smart home 120-1 ), It can indicate that the door lock is released.

The fact that access to the external device 120 is allowed means that when the user 110 wearing the user identification device 100 is connected to the smart car 120 -2), it may indicate that the smart car 120-2 is unlocked. The fact that the access to the external device 120 is allowed means that the user 110 wearing the user identification device 100 in the case where the external device 120 is the smart car 120-2 is the smart car 120-2, The smart car 120-2 can set the operating conditions of the personalized smart car 120-2 to the user 110. [

Access to the external device 120 is permitted when the user 110 wearing the user identification device 100 is in the home and the temperature of the home, lighting, music volume, As shown in FIG. Allowing access to the external device 120 may indicate unlocking a smart device, such as a smart phone, tablet, or TV, without a fingerprint or iris scan. Allowing access to the external device 120 may indicate that a personalized ticket for various events is issued or that the payment system is easily accessible without performing additional authentication procedures.

Thus, the user 110 does not perform an operation to authenticate the user 110, for example, an iris scan, a fingerprint scan, a PIN code input, a password input, The user authentication procedure can be performed in all applications requiring authentication to the user. Accordingly, the user 110 can connect to the event requiring various authentication only by wearing the user identification device 100 without performing an additional authentication procedure, and can provide an ID (Identification) certificate for authenticating the user 110 You do not need to show.

The user identification device 100 may store parameters of a trained classification algorithm for a plurality of users and may set the same or different access ranges for a plurality of user-specific external devices 120. For example, in the case of storing parameters of a trained classification algorithm that can identify user 1, user 2, and user 3 respectively, the user identification device 100 may be configured for each of user 1, user 2, It is possible to unlock the smart home 120-1 and set the access range for the external device 120 so that the user 1 can unlock the smart car 120-2. In addition, the user identification device 100 may set an access range for the external device 120 to access different payment systems for each of the users 1, 2, and 3.

As described above, the application can be used in all applications requiring user authentication by the user identification device 100 according to the present disclosure without performing an additional authentication procedure. User authentication in all applications may be performed based on user identification results performed in accordance with the present disclosure. Identification and authentication of the user 110 may be performed continuously while the user 110 is wearing the user identification device 100. [

  The user identification device 100 according to the present disclosure can be used when accessing various electronic services when accessing various devices such as, for example, mobile phones, smart phones, computers, etc., It can be used for unlocking various smart devices.

The user 110 need not perform a login or unlock operation every time an attempt is made to access a device, network or payment system by the user identification device 100 according to the present disclosure. Further, the user identification device 100 according to the present disclosure allows the user 110 to perform continuous authentication, which can be spoofing proof without additional security. This is because the user identification device 100 according to the present disclosure uses the biometric data of the user 110 to identify the user. The user identification device 100 according to the present disclosure allows the user 110 to register the identity of the user only once without having to re-login in the IoT network environment and to perform seamless access have.

The external device 120 shown in FIG. 1 may be any device that provides accessible electronic devices for user authentication or any device that is accessible through user authentication. The external device 120 may include an external user authentication device. The external device 120 may include a smart home 120-1, a smart car 120-2, an IoT device 120-3, and a smartphone 120-4, as shown in FIG. 1 But is not limited thereto. For example, the external device 120 may further include a billing system, a device capable of notifying the occurrence of an event. Events may include, but are not limited to, events related to purchases, such as, for example, purchase of items, purchase of tickets, and the like.

4 is a block diagram of a user identification device 400 in accordance with one embodiment.

4, the user identification device 400 includes a transmitter 410, a receiver 420, a processor 430, and a memory 440, but the components of the user identification device 400 are not limited thereto . For example, the user identification device 400 may further include a user interface 450.

Transmitter 410 may generate an RF signal and scatter the RF signal generated by the user's body part. The transmitter 410 may be controlled by the processor 430 to generate an RF signal and scatter the RF signal generated by the user's body part. The transmitter 410 may generate an RF signal and scatter the RF signal generated by the user's body part, if the user wears the user identification device 400, regardless of the control of the processor 430. [

Whether or not the user wears the user identification device 400 is detected by a sensor not shown in the user identification device 400 and the sensed result is transmitted to the transmitter 410 to enable the operation of the transmitter 410 enable). The result sensed by the sensor is sent to the processor 430 and the processor 430 can control the operation of the transmitter 410 based on the sensed result. Determining whether a user has worn the user identification device 400 may follow, but is not limited to, user input indicating wear of the user identification device 400. [ A user input indicating wear of the user identification device 400 may include a user input that turns on the power of the user identification device 400. [

The transmitter 410 may scatter an ultra-wideband RF signal of 1 to 15 GHz, but the frequency band of the scattered RF signal is not limited thereto. Transmitter 410 may include a transmit antenna that scatters the RF signal.

Receiver 420 receives an RF signal that has passed through the body part of the user. Receiver 420 may receive an ultra-wideband RF signal that has passed through the body part of the user. The receiver 420 may include a receive antenna or a receive sensor for receiving an RF signal that has passed through the body portion of the user. Receiver 420 may be controlled by processor 430 to receive an RF signal. The receiver 420 may be enabled for operation of the receiver 420 by a signal sensed from a sensor (not shown) that senses whether the user identification device 400 is worn. The processor 430 may control the operation of the receiver 420 by a signal sensed by the sensor.

The processor 430 trains the RF signals received via the receiver 420 by a classification algorithm and obtains the parameters of the trained classification algorithm. The processor 430 stores the obtained parameters in the memory 440. After storing the parameters in the memory 440, the processor 430 reads the parameters stored in the memory 440 as the RF signals are received via the receiver 420 and analyzes the RF signals received by the trained classification algorithm Identify the user.

When the processor 430 obtains the parameters of the classification algorithm, it may request the user through the user interface 450 for at least one predefined user gesture. The user interface 450 may be configured to have a function to receive user input and output information, such as a touch screen. The user interface 450 may be configured to request the user to at least one user gesture controlled by the processor 430 and predefined as an audio signal and / or a video signal.

The processor 430 may output the user identification result via the user interface 450. The user identification result output through the user interface 450 may have an alarm form, a character form, and / or an image form, but is not limited thereto. The alarm form can be represented by an audio signal or / and light. The user identification result output through the user interface 450 may indicate the completion of the identification operation or the identification operation. The user identification result output through the user interface 450 may indicate whether the user wearing the user identification device 400 is the owner of the user identification device 400. [

The user interface 450 may be a user interface of the wearable device when the user identification device 400 is incorporated into a wearable device that the user wears. The processor 430 may be a processor of the wearable device when the user identification device 400 is integrated into a user wearable wearable device. The processor 430 may be referred to as a central processing unit that controls the overall functionality of the user identification device 400.

The memory 440 may store parameters obtained according to the training of the classification algorithm for the received RF signals. The memory 440 may be configured to train the classification algorithm for the RF signals on which the user identification device 400 is received in accordance with this disclosure as it is recognized that the user has worn the user identification device 400, And may include a program and / or application that includes one or more instructions that can be obtained, used to identify the user using the obtained parameters, and to perform the process of using or transmitting the identification results of the user. The memory 440 may store an RF signal received via the receiver 420 for a predetermined period of time. Processor 430 may read the RF signals stored in memory 440 to train the classification algorithm to obtain parameters.

The memory 440 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory), a RAM (Random Access Memory), SRAM (Static Random Access Memory), ROM (Read Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), PROM (Programmable Read-Only Memory) A disk, and / or an optical disk.

The processor 430 may execute programs and / or applications stored in the memory 440 to perform the user identification method in accordance with the present disclosure. The processor 430 may include a converter that converts the RF signal received from the receiver 420 into a digital signal. If processor 430 does not include a transducer as described above, receiver 420 may include a transducer that converts the received RF signals into a digital signal.

The user identification device 400 shown in FIG. 4 may be configured to further include various sensors such as an Accelerometers sensor, a Gyroscopes sensor, a Magnetometers sensor, and the like. When the user identification device 400 further includes the various sensors described above, the user identification device 400 can use the sensed results through the various sensors described above to more accurately identify the user gesture and / or user have.

5 is a block diagram of a user identification device 500 according to another embodiment. 5, a user identification device 500 includes a transmit antenna 101, a receive antenna 102, a transmitter 103, a receiver 104, an analog-to-digital converter 105, a memory 106, 107). The RF radar in the present disclosure may include a transmit antenna 101, a receive antenna 102, a transmitter 103, a receiver 104, and an analog-to-digital converter 105. The processor 107 may be configured and operated with the processor 430 shown in FIG. The memory 106 may be configured and operated as the memory 440 shown in FIG.

5, the user identification device 500 includes one transmit antenna 101, one receive antenna 102, one transmitter 103, one receiver 104, and one analog-to-digital converter (ADC) And includes a plurality of transmit antennas 101, a plurality of receive antennas 102, a plurality of transmitters 103, a plurality of receivers 104 and a plurality of ADCs 105 . The receiving antenna 102 shown in FIG. 5 may be configured as a receiving sensor. The transmit antenna 101 and the receive antenna 102 may be disposed adjacent to the transmitter 103 and the receiver 104, respectively.

In FIG. 5, the processor 107 includes a memory 106. The memory 106 may be separate from the processor 107. The memory 106 may comprise any type of computer-writable storage device and / or any computer-writable storage medium. The memory 106 stores the parameters of the trained classification algorithm. The memory 106 may be configured as the memory 440 shown in FIG. If the processor 107 is an external processor of the user identification device 500, the digital signal output from the ADC 105 may be transferred to an external processor. The external processor may be, but is not limited to, a processor of the device in which the user identification device 500 is integrated.

The transmitting antenna 101 may be coupled to the transmitter 103 and the receiving antenna 102 may be coupled to the receiver 104. The transmitting antenna 101 may scatter the UWB signals. The receive antenna 102 may receive ultra-wideband signals. The transmit antenna 101 and the receive antenna 102 may be disposed across a user's body part and disposed within the user identification device 500 when the user wears the user identification device 500, It is not limited.

6 is an example of the arrangement of components included in the user identification device 500 shown in FIG. Referring to FIG. 6, an example in which the user identification device 500 is integrated into the watch 60 is shown. Thus, in the case of FIG. 6, the watch 60 incorporating the user identification device 500 can be worn on the wearer's wrist 61. In the case of FIG. 6, the transmitting antenna 101 and the receiving antenna 102 are disposed inside the watch 60 and opposite to each other when the user wears the watch 60.

Devices in which the user identification device 500 may be integrated in this disclosure are not limited to the watch 60. The device from which the user identification device 500 may be integrated may include the device referred to in Fig. Depending on the device into which the user identification device 500 is integrated, the location and number of the transmit antenna 101 and the receive antenna 102 may be determined.

FIG. 7 is another example of the arrangement of the components included in the user identification device 500 shown in FIG. Referring to FIG. 7, the transmitting antenna 101 and the receiving antenna 102 are arranged as shown in FIG. 6, but the transmitter 103 and the receiver 104 may be disposed adjacent to each other. The transmitter 103 and the receiver 104 may be configured as an integrated transceiver.

  When the user wears the user identification device 500, the transmitter 103 generates ultra-wideband signals and scatters ultra-wideband signals to the tissues of the user's body part by the transmission antenna 101. [ The transmitter 103 may be configured to operate in the range of 1 to 15 GHz.

The scattered ultra-wideband signal passes through the tissue of the user's body part. At the same time, the tissues of the user's body part distort the UWB signal. Distortions of the received ultra-wideband signal are represented, for example, by attenuation (change in amplitude) of the RF signal and phase shift of the RF signal. The receiver 104 is thus distorted to receive signals passing through the body part of the user.

The ADC 105 is connected to the receiver 104. The ADC 105 converts the signals received by the receiver 104 into digital signals provided to the processor 107. The processor 107 analyzes the received digital signals using the parameters of the trained classification algorithm stored in the memory 106 to identify the user.

The processor 107 trains the classification algorithm stored in the memory 106 for the received RF signal to obtain parameters for identifying the user and stores the obtained parameters in the memory 106. [ After storing the parameters in the memory 106, the processor 107 reads the parameters stored in the memory 106 and analyzes the received RF signals by a trained classification algorithm to obtain a user identification result. The analysis of RF signals by the trained classification algorithm using parameters of the trained classification algorithm uses techniques known in the art.

Optionally, the processor 107 may perform pre-processing before analyzing the received RF signals. The preprocessing is performed by a method such as averaging, moving average, moving median, etc., scaling of signal values within the entire frequency range, wavelet transform, Fourier transform, Taking the logarithm, exponent, exponentiation, multiplication / division by a constant, subtraction / addition of a constant, differentiation, integration, etc. From the resulting data set, such as various mathematical transformations on the received data, signal transforms and inverse transforms from complex numbers to amplitude phase representations, data sets obtained with errors as a result of interference, calculation errors, etc., outliers " of the received digital signal. Since the preprocessing operation is well known in the art, no detailed description is required. The user identification device 500 may be configured such that the above-described pre-processing is performed between the ADC 105 and the processor 107. [ In addition, the above-described preprocessing can also be performed on the received RF signals to train the classification algorithm.

8 is a configuration diagram of a user identification device 800 according to another embodiment.

Referring to FIG. 8, the user identification device 800 further includes a communication interface 108 to the user identification device 500 of FIG. The communication interface 108 may be referred to as an auxiliary transmitter. The communication interface 108 may transmit the user identification result to the external device 120 shown in FIG. The communication interface 108 can transmit the digital signal output from the ADC 105 to the external device 120. [ If the processor 107 is an external processor of the user identification device 800, the digital signal output from the ADC 105 may be transferred to an external processor.

The communication interface 108 can transmit and receive data based on local communication with the external device 120. [ The near field communication may be, for example, a Bluetooth communication, a Bluetooth low energy (BLE) communication, a near field communication, a WLAN communication, a Zigbee communication, an infrared data association (IrDA) But is not limited to, WFD (Wi-Fi Direct) communication, UWB (ultra wideband) communication, Ant + communication, and the like. For example, the communication interface 108 may be configured based on wired communication. The communication interface 108 may transmit data received from the external device 120 to the processor 107. The processor 107 may send user information stored in the memory 106 to the external device 120 via the communication interface 108 based on data received from the communication interface 108. [ The processor 107 may transmit the user identification result to the external device 120 via the communication interface 108 based on the data received from the communication interface 108. [ The user identification result transmitted to the external device 120 through the communication interface 108 may include a user identification result that can be output through the user interface 450 of FIG.

9 is a flowchart illustrating an operation of a method for identifying a user according to an exemplary embodiment of the present invention. The user identification method shown in FIG. 9 may be performed by the user identification devices 400, 500, 800 shown in FIGS. 4 to 8 based on the user identification device 100 shown in FIG. 1 .

In step S910, the user identification device 100 generates RF signals and scatters the generated RF signals into the body part of the user 110. [ For example, the user identification device 100 generates RF signals at the transmitter 103 and scatters the generated RF signals via the transmit antenna 101 to the user's body part. The RF signal scattered into the user's body part is not limited to the frequency band of the ultra-wideband signal of 1 to 15 GHz or the scattered RF signal. The user identification device 100 may perform step S910 if the user 110 wears the user identification device 100. [ Determining whether the user 110 wore the user identification device 100 can be performed as described in Fig. Step S910 is performed after the user identification device 100 stores the parameters obtained by training the RF signal passed through the body part of the user by the classification algorithm.

In step S920, the user identification device 100 receives RF signals that have passed through the user body portion. For example, the user identification device 100 receives RF signals that have passed through the user's body part via the receive antenna 102 or the receive sensor. When the RF signal scattered from the user identification device 100 is an ultra-wideband signal of 1 to 15 GHz, the received RF signal is an ultra-wideband signal of 1 to 15 GHz.

In step S930, the user identification device 100 identifies the user by analyzing the RF signals received by the trained classification algorithm using the parameters of the stored trained classification algorithm. Analyzing the RF signal received by the trained classification algorithm may be used to classify received RF signals using parameters and to identify whether the classified RF signal corresponds to an RF signal that has passed through the body part of the user have. When the classified RF signal corresponds to an RF signal that has passed through the body part of the user, the user identification device 100 determines whether the user wearing the user identification device 100 is the user identification device 100 .

10 is a flowchart of a training process of a classification algorithm in a user identification method according to an exemplary embodiment. FIG. 10 may be performed before performing the user identification method shown in FIG. 9, but is not limited thereto. Figure 10 may be performed when a user first wears the user identification device 100. [ 10 may be performed for each of a plurality of users. 10 may be performed for a plurality of users, the user identification device 100 may identify a plurality of users. 10 may be performed for each of a plurality of gestures of a user. A user may register at least one gesture among a plurality of gestures as a unique signature of the user.

In step S1010, the user identification device 100 generates RF signals when the user's body part performs a gesture, and scatters the generated RF signals to the user's body part. In step S1010, the user identification device 100 may detect whether the user 110 wears the user identification device 100 and then detect whether the user 110 performs the gesture. To this end, the user identification device 100 may utilize a sensor included in the user identification device 100. [ The user identification device 100 may request the user to predefine the user gesture before performing step S1010. A method of requesting a user for a user gesture can be performed using the user interface 450 as described in FIG.

In step S1020, the user identification device 100 receives RF signals that have passed through the body part of the user. In the case where the RF signals scattered in step S1010 are ultra-wideband signals of 1 to 15 GHz, the received RF signals are ultra-wideband signals of 1 to 15 GHz distorted as they pass through the user's body part.

In step S1030, the user identification device 100 trains the received RF signals with a classification algorithm to obtain the parameters of the trained classification algorithm. The obtained parameters include reference values, parameters or information for classifying the RF signals received by the training classification algorithm into RF signals corresponding to user and / or user gestures.

In step S1040, the user identification device 100 stores the obtained parameters. When storing the parameters, the user identification device 100 may further store the additional information so that at least one of the plurality of gestures or each of the plurality of gestures may be registered as a unique signature of the user. The stored additional information may indicate that the user gesture identified by the stored parameters is registered with the user's unique signature.

11 is a flowchart illustrating an operation of a user identification method according to another embodiment. Steps S1110, S1120, and S1140 shown in Fig. 11 are performed similarly to steps S910 to S930 of Fig. 9 described above.

In step S1130, the user identification device 100 converts the received RF signals into a digital signal. In step S1140, the user identification device 100 identifies the user by analyzing by a trained analysis algorithm for the RF signals converted into digital signals.

12 is a flowchart of a training process of a classification algorithm in a user identification method according to another embodiment. Steps S1210, S1220, S1240, and S1250 shown in Fig. 12 are performed similarly to steps S1010 to S1040 shown in Fig.

In step S1230, the user identification device 100 converts the received RF signals into digital signals. In step S1240, the user identification device 100 trains the RF signals converted into digital signals into a classification algorithm to obtain the parameters.

13 is a flowchart illustrating an operation of a user identification method according to another embodiment. FIG. 13 is an example in which a technical configuration for transmitting a user identification result to an external device is added to the operation flow chart of FIG. Steps S1310 to S1330 in Fig. 13 are performed similarly to steps S910 to S930 in Fig.

In step S1340, the user identification device 100 transmits the user identification result to the external device 120. [ The user identification device 100 may transmit the user identification result to the external device 120 via the communication interface 108 shown in Fig. The user identification device 100 may transmit the user identification result to the external device 120 in response to a request from the external device 120 via the communication interface 108. [ The user identification result may include user authentication information (e.g., user login information, user authentication password information). The user authentication information may be previously stored in the user identification device 100. [ The user identification result may be substituted for the user authentication information.

14 is a flowchart illustrating an operation of a user identification method according to another embodiment. FIG. 14 is an example of adding the feature of transmitting the user identification result and the identified user gesture to the external device, respectively, in the example shown in FIG. Steps S1410 and S1420 in Fig. 14 are performed similarly to steps S910 and S920 in Fig.

In step S1430, the user identification device 100 analyzes the RF signal received by the classified classification algorithm using the stored parameters to identify the user and the user gesture, respectively. The stored parameters may comprise information that can classify received RF signals by user and by user gesture.

In step S1440, the user identification device 100 transmits the result of identifying the user identification result and the user gesture to the external device 120 through the communication interface 108 in Fig. The user identification device 100 may transmit a result of identifying the user identification result and the user gesture to the external device 120 when a request is received from the external device 120 through the communication interface 108. [

15 is a flowchart illustrating an operation of a user authentication method according to an embodiment. Fig. 15 is operated on the basis of a device 1510, an external device 1520, and a payment system 1530 having a user identification function according to the present disclosure.

In step S1501, the device 1510 identifies the user using the RF signal according to the present disclosure. After the user is identified, the connection between the device 1510 and the external device 1520 is established (S1502), and the information input process based on the event is performed in the external device 1520 (S1503) (S1504), the device 1510 transmits the user identification information to the external device 1520 (S1505). The user identification information may include user authentication information stored in the device 1510, and user identification information may be used as user authentication information.

The information input process based on the event performed in step S1503 may include, for example, inputting information for issuing a ticket. For example, when the ticket is a train ticket, the information described above may include the departure information, the destination information, the boarding time information, and the passenger information. The above-described information input can be directly input by the user wearing the device 1510 using the external device 1520. [ For example, the external device 1520 may be a ticketing machine that is installed in a smartphone or a train station. Ticket issuing machine is a device having a communication function. When the external device 1520 is a smart phone, the above-described information input process can be performed based on the ticket issuing application executed by the external device 1520. [ Connection establishment between the device 1510 and the external device 1520 performed in step S1502 may be performed after the information input process is completed in step S1503 and when a user authentication request is performed in step S1504. The owner of the external device 1520 and the device 1510 may be the same, but may be different.

When the user identification information is received from the device 1510, the external device 1520 requests the payment system 1530 in step S1506 for a settlement process based on the user identification information. The payment system 1530 may be an Internet based payment server.

The payment system 1530 obtains information about the device 1510 based on the received user identification information and establishes a connection between the device 1510 and the payment system 1530 based on the acquired information about the device 1510 (S1507). To this end, the payment system 1530 may include a database that stores information that maps user identification information and information about the device 1510. The information about the device 1510 includes information that can be associated with the device 1510 based on a communication network such as the Internet.

When a connection is established with the device 1510, the payment system 1530 transmits a user authentication request for payment to the device 1510 in step S1508. Accordingly, in step S1509, the device 1510 transmits the user identification information to the payment system 1530. [ When the user identification information is received from the device 1510, the payment system 1530 performs payment processing based on the received user identification information. When the payment processing is completed, guidance information on completion of the payment processing is transmitted to the external device 1520 (S1510). Accordingly, the external device 1520 outputs a payment completion notification message to notify the user of the device 1510 of the completion of the payment (S1511). The payment system 1530 can transmit the payment completion guide information to the device 1510 when transmitting the payment completion guide information to the external device 1520. [ The external device 1520 can output the payment completion notification as an audio signal and / or a video signal.

The technical features of the present disclosure can be clearly described by the embodiments described in the specification and the accompanying drawings. It will be apparent to those skilled in the art that the technical features of the present disclosure can be modified and embodied by other embodiments without departing from the technical features of the present disclosure. It is therefore to be understood that the embodiments disclosed in the specification and the accompanying drawings are illustrative and not restrictive. Unless otherwise specified, an element disclosed in a single form in a claim does not exclude the presence of a plurality of such elements.

Meanwhile, the disclosed embodiments may be embodied in the form of a computer-readable recording medium for storing instructions and data executable by a computer. The command may be stored in the form of program code, and when executed by the processor, may generate a predetermined program module to perform a predetermined operation. In addition, the instructions, when executed by a processor, may perform certain operations of the disclosed embodiments.

Claims (15)

A user identification device using a radio frequency (RF) radar, A transmitter for transmitting a radio frequency signal to a user's body part; A receiver for receiving a radio frequency signal transmitted from the transmitter and passed through a body part of the user; A memory for storing parameters of a classification algorithm trained for a radio frequency signal that has passed through a body part of the user; And And a processor for identifying the user by analyzing the received radio frequency signal by the trained classification algorithm using the parameters as the radio frequency signal passed through the body portion is received via the receiver, . 2. The method of claim 1, wherein the user identification device further comprises a user interface, wherein the processor is configured to: request the user to predefine at least one user gesture via the user interface; Training a classification algorithm for a radio frequency signal that has passed through the body part of the user to obtain said parameters and store said obtained parameters in said memory. 2. The method of claim 1, wherein the processor is further configured to: scatters the radio frequency signals through the transmitter to a new portion of the user; and when radio frequency signals that have passed through the body portion of the user through the receiver are received, Training a classification algorithm for radio frequency signals to obtain the parameters, and storing the obtained parameters in the memory. 2. The apparatus of claim 1, wherein the user identification device further comprises a communication interface for communicating with an external device, Wherein the processor transmits a result of identifying the user to the external device via the communication interface. 2. The user identification device of claim 1, wherein the processor controls the user identification device to continue to identify the user using the transmitter and the receiver. 2. The apparatus of claim 1, wherein the transmitter comprises a transmit antenna, the receiver comprises a receive antenna, Wherein the user identification device further comprises a converter for converting radio frequency signals received through the receiver to a digital signal. 2. The user identification device of claim 1, wherein the user identification device is integrated into a wearable device, and wherein the processor is a processor of the wearable device. 2. The user identification device of claim 1, wherein the radio frequency signal is an ultra-wideband signal. A method of identifying a user using a radio frequency radar by a device, Generating radio frequency signals by a transmitter of the device and scattering the generated radio frequency to a body part of the user; Receiving a radio frequency signal that has passed through a body part of the user by a receiver of the device; Analyzing the received radio frequency signal by the trained classification algorithm running on the processor of the device using parameters of the trained classification algorithm as the radio frequency signal passed through the body part of the user is received, And identifying the user. 10. The method of claim 9, Requesting at least one predefined user gesture through the user interface of the device to the user; Training, by the processor, a classification algorithm for a radio frequency signal passing through a body part of the user based on each user gesture to obtain the parameters; And And storing, by the processor, the obtained parameters in the device. 10. The method of claim 9, Scattering the radio frequency signals to a body part of the user via a transmitter of the device; Receiving a radio frequency signal through a body portion of the user through a receiver of the device; Training, by the processor, a classification algorithm for the received radio frequency signals to obtain the parameters; And And storing, by the processor, the obtained parameters in the device. 10. The method of claim 9, And transmitting the result of identifying the user to an external device via a communication interface of the device. 10. The method of claim 9, Distributing the radio frequency signals to the body part of the user, receiving the radio frequency signals passed through the body part of the user, and identifying the user. . 10. The method of claim 9, wherein the radio frequency signal is an ultra wideband signal. A computer-readable recording medium storing computer program code for performing a user identification method, The user identification method comprising: Generating radio frequency signals by a transmitter of the device and scattering the generated radio frequency to a body part of the user; Receiving a radio frequency signal that has passed through a body part of the user by a receiver of the device; Analyzing the received radio frequency signal by the trained classification algorithm running on the processor of the device using parameters of a classification algorithm trained for a radio frequency signal that has passed through the body part of the user to identify the user Readable medium having computer readable program code embodied thereon.

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