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WO2018119949A1 - Procédé et appareil de correction de phase d'informations d'état de canal - Google Patents

Procédé et appareil de correction de phase d'informations d'état de canal Download PDF

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Publication number
WO2018119949A1
WO2018119949A1 PCT/CN2016/113258 CN2016113258W WO2018119949A1 WO 2018119949 A1 WO2018119949 A1 WO 2018119949A1 CN 2016113258 W CN2016113258 W CN 2016113258W WO 2018119949 A1 WO2018119949 A1 WO 2018119949A1
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Prior art keywords
phase
measurement matrix
csi
carrier
csi phase
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Ceased
Application number
PCT/CN2016/113258
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English (en)
Chinese (zh)
Inventor
王洁
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Shenzhen Tinno Wireless Technology Co Ltd
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Shenzhen Tinno Wireless Technology Co Ltd
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Publication date
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Priority to PCT/CN2016/113258 priority Critical patent/WO2018119949A1/fr
Publication of WO2018119949A1 publication Critical patent/WO2018119949A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels

Definitions

  • CSI Channel State Information
  • the CSI describes the attenuation factor of the signal on each transmission path, that is, the value of each element in the channel gain matrix H, such as signal scattering, environmental attenuation, and distance attenuation.
  • RSS Received Signal Strength
  • CSI can not only provide multi-carrier signal strength information, but also provide multi-carrier signal phase information, which enriches the amount of useful information that the physical layer can provide, and can significantly improve wireless.
  • the performance of the positioning system constructs an offline position state fingerprint database by utilizing the multi-carrier amplitude information provided by the CSI, thereby implementing position estimation and positioning by means of the pattern recognition method in the online phase.
  • the embodiment of the present application provides a method and a device for correcting the phase of the channel state information, so as to solve the problem that the prior art lacks the proper correction of the original CSI phase information error.
  • the corrected CSI phase measurement matrix is calculated according to the original CSI phase measurement matrix and the preset phase correction algorithm.
  • any possible implementation manner further provide an implementation manner of calculating a modified CSI phase measurement matrix according to the original CSI phase measurement matrix and the preset phase correction algorithm, specifically including:
  • the corrected CSI phase measurement matrix is obtained by correcting each element by the phase correction formula.
  • the linear phase shift formula is among them, with Representing the optimal linear phase offset slope and intercept, respectively, ⁇ m,n is the element of the mth row and n columns in the original CSI phase measurement matrix, that is, the original CSI phase information of the mth antenna on the nth carrier, f For frequency differences between adjacent carriers, a and b represent the slope and intercept of the linear phase offset, respectively.
  • the phase correction formula is among them, To correct the elements of the mth row and n columns in the CSI phase measurement matrix, that is, the corrected CSI phase information of the mth antenna on the nth carrier.
  • the number of the carriers is at least 10, and the frequency differences between adjacent carriers are equal.
  • a channel state information phase correction method provided by an embodiment of the present application is applied to a multi-carrier multi-antenna communication system in which both a physical layer of a transmitting end and a physical layer of a receiving end adopt an OFDM modulation mode, by receiving the same time on each carrier.
  • the transmitted data signal collects the original CSI phase information of each antenna on each carrier, and then constructs the original CSI phase measurement matrix according to the original CSI phase information, and corrects the original CSI phase measurement matrix by the preset phase correction algorithm to obtain the corrected CSI phase measurement. matrix.
  • the present application provides a technical solution for correcting original CSI phase information, which can directly utilize the phase difference between the corrected CSI phase information received by each antenna (ie, the corrected original CSI phase information).
  • the corrected original CSI phase information can directly utilize the phase difference between the corrected CSI phase information received by each antenna (ie, the corrected original CSI phase information).
  • the embodiment of the present application provides a channel state information phase correction device, which is applied to a multi-carrier multi-antenna communication system, and the device includes:
  • a receiving module configured to receive data signals transmitted on each carrier at the same time
  • An acquisition module collecting original CSI phase information of each antenna on each carrier according to the data signal, to obtain an original CSI phase measurement matrix
  • the correction module calculates a modified CSI phase measurement matrix according to the original CSI phase measurement matrix and the preset phase correction algorithm.
  • the linear phase shift formula is among them, with Representing the optimal linear phase offset slope and intercept, respectively, ⁇ m,n is the element of the mth row and n columns in the original CSI phase measurement matrix, that is, the original CSI phase information of the mth antenna on the nth carrier, f For frequency differences between adjacent carriers, a and b represent the slope and intercept of the linear phase offset, respectively.
  • the number of the antennas is at least three, and the antennas are arranged at equal intervals with a spacing of 1/2 of the average wavelength of each carrier;
  • the number of the carriers is at least 10, and the frequency differences between adjacent carriers are equal.
  • a channel state information phase correction apparatus provided in an embodiment of the present application is applied to a multi-carrier multi-antenna communication system in which a physical layer of a transmitting end and a physical layer of a receiving end adopt an OFDM modulation mode.
  • the receiving module receives the same time.
  • the data signal transmitted on each carrier and then the acquisition module collects the original CSI phase information of each antenna on each carrier according to the data signal.
  • the correction module calculates the correction according to the original CSI phase measurement matrix and the preset phase correction algorithm.
  • CSI phase measurement matrix Compared with the prior art, the present application provides a technical solution for correcting original CSI phase information, which can directly utilize the phase difference between the corrected CSI phase information received by each antenna (ie, the corrected original CSI phase information). To estimate the location information of the target, thereby avoiding the complicated process of constructing the location fingerprint database, and enriching the location fingerprint database by increasing the CSI phase information to provide more robust signal characteristics, thereby improving the positioning accuracy.
  • Embodiment 1 is a schematic flow chart of Embodiment 1 of the present application.
  • FIG. 2 is a schematic structural diagram of a multi-carrier multi-antenna communication system according to Embodiment 2 of the present application;
  • FIG. 3 is a schematic structural view of Embodiment 3 of the present application.
  • the word “if” as used herein may be interpreted as “when” or “when” or “in response to determining” or “in response to detecting.”
  • the phrase “if determined” or “if detected (conditions or events stated)” may be interpreted as “when determined” or “in response to determination” or “when detected (stated condition or event) “Time” or “in response to a test (condition or event stated)”.
  • the embodiment of the present application provides a method for correcting the phase of the channel state information, which is applied to a multi-carrier multi-antenna communication system in which the physical layer of the transmitting end and the physical layer of the receiving end adopt the OFDM modulation mode, please refer to FIG.
  • a schematic flowchart of a method provided by applying the embodiment, as shown in the figure, the method includes the following steps:
  • the physical layer of the transmitter adopts an OFDM modulation method to simultaneously transmit data packets to be transmitted on N carriers;
  • the physical layer of the receiver also adopts an OFDM modulation method, and uses M antennas to simultaneously receive data on N carriers.
  • the packet wherein the number of antennas is at least three, the antennas are arranged at equal intervals and the spacing is 1/2 of the average wavelength of each carrier, the number of carriers is at least 10, and the frequency differences between adjacent carriers are equal.
  • the receiver separately collects M*N elements of CSI original phase information of the M antennas on the N carriers according to the received data packet, thereby obtaining a CSI phase measurement matrix ⁇ , and the matrix can be expressed as
  • the corrected CSI phase measurement matrix is calculated by a preset phase correction algorithm. Specific steps are as follows:
  • linear phase shift formula used in this step is specifically among them, with Representing the optimal linear phase offset slope and intercept, respectively, ⁇ m,n is the element of the mth row and n columns in the original CSI phase measurement matrix, that is, the original CSI phase information of the mth antenna on the nth carrier, f
  • a and b represent the slope and intercept of the linear phase offset, respectively.
  • the corrected CSI phase measurement matrix is obtained by correcting each element by the phase correction formula.
  • each element is corrected to obtain each modified CSI phase information, and each modified CSI phase information is used as an element to obtain a modified CSI phase measurement matrix.
  • the matrix can be expressed as among them, To correct the elements of the mth row and n columns in the CSI phase measurement matrix, that is, the corrected CSI phase information of the mth antenna on the nth carrier, with Indicates the optimal linear phase offset slope and intercept, respectively, f is the frequency difference between adjacent carriers, ⁇ m,n is the element of the mth row and n columns in the original CSI phase measurement matrix, that is, the mth antenna is in the first Original CSI phase information on n carriers.
  • a channel state information phase correction method provided by an embodiment of the present application is applied to a multi-carrier multi-antenna communication system in which both a physical layer of a transmitting end and a physical layer of a receiving end adopt an OFDM modulation mode, by receiving the same time on each carrier.
  • the transmitted data signal collects the original CSI phase information of each antenna on each carrier, and then constructs the original CSI phase measurement matrix according to the original CSI phase information, and corrects the original CSI phase measurement matrix by the preset phase correction algorithm to obtain the corrected CSI phase measurement. matrix.
  • the present application provides a technical solution for correcting original CSI phase information, which can directly utilize the phase difference between the corrected CSI phase information received by each antenna (ie, the corrected original CSI phase information).
  • the corrected original CSI phase information can directly utilize the phase difference between the corrected CSI phase information received by each antenna (ie, the corrected original CSI phase information).
  • terminals involved in the embodiments of the present application may include, but are not limited to, a personal computer (PC), a personal digital assistant (PDA), a wireless handheld device, a tablet computer, and a tablet computer.
  • PC personal computer
  • PDA personal digital assistant
  • Mobile phones MP3 players, MP4 players, etc.
  • the execution body of S101 to S103 may be a channel state information phase correction device, and the device may be located in an application of a local terminal, or may be a plug-in or a software development toolkit in an application of a local terminal (Software Development) Functional units such as Kit, SDK, and the like are not specifically limited in the embodiment of the present application.
  • the application may be an application (nativeApp) installed on the terminal, or may be a web application (webApp) of the browser on the terminal, which is not limited by the embodiment of the present application.
  • FIG. 2 is a schematic structural diagram of a multi-carrier multi-antenna communication system according to an embodiment.
  • the system is composed of an OFDM transmitter 1, a transmit antenna 2, an OFDM receiver 3, a receive antenna 4, a receive antenna 5, and a receive antenna 6.
  • OFDM transmitter is based on Intel5300 chip design, meets WiFi standard, supports 802.11a/b/g/n protocol, supports 2.4GHz, 5GHz dual-frequency operation, adopts OFDM modulation; transmit antenna adopts 10dB gain omnidirectional dual-frequency antenna, SMA Interface, support 2.4GHz, 5GHz dual-band operation; OFDM receiver based on Intel5300 chip design, meet WiFi standard, support 802.11a/b/g/n protocol, support 2.4GHz, 5GHz dual-band operation, adopt OFDM modulation; three receiving antennas The antenna array is composed of 2.45cm, and each of the three antennas adopts a 10dB gain omnidirectional dual-frequency antenna, and the SMA interface supports 2.4GHz and 5GHz dual-frequency operation.
  • the OFDM receiver receives the original CSI phase information of the three antennas on the 64 carriers at the same time, and obtains the corresponding CSI phase measurement matrix ⁇ , which can be expressed as
  • Each element is corrected to obtain each modified CSI phase information, and each modified CSI phase information is used as an element to obtain a modified CSI phase measurement matrix.
  • the matrix can be expressed as
  • the test results show that if the original CSI phase measurement matrix ⁇ is used, the CSI phase information of each antenna measured in each data packet has no correlation, and the phase is randomly distributed in the range of 0 to 2 ⁇ , which cannot provide effective CSI phase information. If the CSI phase correction method provided by the present application is used, the phase deviation of each antenna of each carrier between different data packets is within 0.05 ⁇ , which effectively improves the accuracy of the CSI phase information, and makes the CSI phase information change useful.
  • FIG. 3 is a functional block diagram of a multi-channel state information phase correction apparatus according to an embodiment of the present application.
  • the device is applied to a multi-carrier multi-antenna communication system, and the device includes:
  • the receiving module 310 is configured to receive data signals transmitted on each carrier at the same time;
  • the acquiring module 320 is configured to collect original CSI phase information of each antenna on each carrier according to the data signal to obtain an original CSI phase measurement matrix;
  • the correction module 330 calculates a modified CSI phase measurement matrix according to the original CSI phase measurement matrix and the preset phase correction algorithm.
  • the calibration module is specifically configured to:
  • the corrected CSI phase measurement matrix is obtained by correcting each element by the phase correction formula.
  • the linear phase shift formula is among them, with Representing the optimal linear phase offset slope and intercept, respectively, ⁇ m,n is the element of the mth row and n columns in the original CSI phase measurement matrix, that is, the original CSI phase information of the mth antenna on the nth carrier, f For frequency differences between adjacent carriers, a and b represent the slope and intercept of the linear phase offset, respectively.
  • the phase correction formula is among them, To correct the elements of the mth row and n columns in the CSI phase measurement matrix, that is, the corrected CSI phase information of the mth antenna on the nth carrier.
  • the number of the antennas is at least three, and the antennas are arranged at equal intervals with a spacing of 1/2 of the average wavelength of each carrier;
  • the number of the carriers is at least 10, and the frequency differences between adjacent carriers are equal.
  • a channel state information phase correction apparatus provided in an embodiment of the present application is applied to a multi-carrier multi-antenna communication system in which a physical layer of a transmitting end and a physical layer of a receiving end adopt an OFDM modulation mode.
  • the receiving module receives the same time.
  • the data signal transmitted on each carrier then,
  • the acquisition module collects original CSI phase information of each antenna on each carrier according to the data signal.
  • the correction module calculates a modified CSI phase measurement matrix according to the original CSI phase measurement matrix and a preset phase correction algorithm.
  • the present application provides a technical solution for correcting original CSI phase information, which can directly utilize the phase difference between the corrected CSI phase information received by each antenna (ie, the corrected original CSI phase information).
  • the corrected original CSI phase information To estimate the location information of the target, thereby avoiding the complicated process of constructing the location fingerprint database, and enriching the location fingerprint database by increasing the CSI phase information to provide more robust signal characteristics, thereby improving the positioning accuracy.
  • the disclosed system, apparatus, and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • multiple units or components may be combined.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or hard.
  • the form is implemented in the form of a software functional unit.
  • the above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium.
  • the software functional unit is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform the methods of the various embodiments of the present application. Part of the steps.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes. .

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé et un appareil de correction de phase d'informations d'état de canal, se rapportant au domaine technique des communications sans fil. D'une part, dans les modes de réalisation de la présente invention, le procédé consiste à : recevoir des signaux de données transmis simultanément sur diverses porteuses ; puis recueillir, selon les signaux de données, des informations de phase de CSI d'origine sur les diverses porteuses de diverses antennes de façon à obtenir une matrice de mesure de phase de CSI d'origine ; et, enfin, calculer, en fonction de la matrice de mesure de phase de CSI d'origine et d'un algorithme de correction de phase prédéfini, une matrice de mesure de phase de CSI corrigée, ce qui améliore la précision des informations de phase de CSI corrigées, et leur permet d'avoir une meilleure valeur d'utilisation. Par conséquent, les informations de phase de CSI corrigées par la solution technique fournie par les modes de réalisation de la présente invention peuvent être appliquées à la technologie de localisation sans fil.
PCT/CN2016/113258 2016-12-29 2016-12-29 Procédé et appareil de correction de phase d'informations d'état de canal Ceased WO2018119949A1 (fr)

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CN112054885A (zh) * 2019-06-05 2020-12-08 大唐移动通信设备有限公司 一种确定校准信息的方法及装置
CN113939016A (zh) * 2021-12-21 2022-01-14 广州优刻谷科技有限公司 基于wifi双频融合的智能终端室内定位方法及系统
CN114757227A (zh) * 2022-06-13 2022-07-15 海南省电力学校(海南省电力技工学校) 一种基于信道状态信息的用户存在感知技术
CN115166636A (zh) * 2022-09-05 2022-10-11 南京信息工程大学 基于多特征信道状态信息边缘计算的工厂人员监管方法
CN115499912A (zh) * 2022-09-19 2022-12-20 西安理工大学 一种基于Wi-Fi信道状态信息的视距识别方法
CN117377062A (zh) * 2023-11-08 2024-01-09 中科晶锐(苏州)科技有限公司 一种利用通道状态信息进行定位的机器学习样本增强方法
CN119183065A (zh) * 2024-10-08 2024-12-24 武汉盛帆电子股份有限公司 一种智能电能表的定位模组、定位方法和智能电能表

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Cited By (10)

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Publication number Priority date Publication date Assignee Title
CN112054885A (zh) * 2019-06-05 2020-12-08 大唐移动通信设备有限公司 一种确定校准信息的方法及装置
CN112054885B (zh) * 2019-06-05 2021-12-28 大唐移动通信设备有限公司 一种确定校准信息的方法及装置
CN113939016A (zh) * 2021-12-21 2022-01-14 广州优刻谷科技有限公司 基于wifi双频融合的智能终端室内定位方法及系统
CN114757227A (zh) * 2022-06-13 2022-07-15 海南省电力学校(海南省电力技工学校) 一种基于信道状态信息的用户存在感知技术
CN115166636A (zh) * 2022-09-05 2022-10-11 南京信息工程大学 基于多特征信道状态信息边缘计算的工厂人员监管方法
CN115166636B (zh) * 2022-09-05 2022-12-20 南京信息工程大学 基于多特征信道状态信息边缘计算的工厂人员监管方法
CN115499912A (zh) * 2022-09-19 2022-12-20 西安理工大学 一种基于Wi-Fi信道状态信息的视距识别方法
CN117377062A (zh) * 2023-11-08 2024-01-09 中科晶锐(苏州)科技有限公司 一种利用通道状态信息进行定位的机器学习样本增强方法
CN117377062B (zh) * 2023-11-08 2024-04-09 中科晶锐(苏州)科技有限公司 一种利用通道状态信息进行定位的机器学习样本增强方法
CN119183065A (zh) * 2024-10-08 2024-12-24 武汉盛帆电子股份有限公司 一种智能电能表的定位模组、定位方法和智能电能表

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