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WO2018117335A1 - Procédé et appareil de correction de phase d'antenne dans un système d'antennes de grande capacité - Google Patents

Procédé et appareil de correction de phase d'antenne dans un système d'antennes de grande capacité Download PDF

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Publication number
WO2018117335A1
WO2018117335A1 PCT/KR2017/002745 KR2017002745W WO2018117335A1 WO 2018117335 A1 WO2018117335 A1 WO 2018117335A1 KR 2017002745 W KR2017002745 W KR 2017002745W WO 2018117335 A1 WO2018117335 A1 WO 2018117335A1
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WIPO (PCT)
Prior art keywords
antenna
signal
port
sequence
output
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Ceased
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PCT/KR2017/002745
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English (en)
Korean (ko)
Inventor
심세준
김종돈
양하영
이주현
최찬호
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Samsung Electronics Co Ltd
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Samsung Electronics Co Ltd
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Publication date
Priority claimed from KR1020170018454A external-priority patent/KR102520406B1/ko
Application filed by Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Priority to US16/463,123 priority Critical patent/US10680726B2/en
Publication of WO2018117335A1 publication Critical patent/WO2018117335A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
    • H01Q5/25—Ultra-wideband [UWB] systems, e.g. multiple resonance systems; Pulse systems

Definitions

  • the present invention relates to a method and apparatus for correcting the phase of an antenna in a large capacity antenna system.
  • a 5G communication system or a pre-5G communication system is referred to as a Beyond 4G network communication system or a post LTE system.
  • 5G communication systems are being considered for implementation in the ultra-high frequency (mmWave) band (eg, such as the 60 Gigabit (60 GHz) band).
  • mmWave ultra-high frequency
  • 60 GHz 60 Gigabit
  • beamforming, massive array multiple input / output (FD-MIMO) in 5G communication systems Array antenna, analog beam-forming, and large scale antenna techniques are discussed.
  • 5G communication system has evolved small cells, advanced small cells, cloud radio access network (cloud RAN), ultra-dense network , Device to device communication (D2D), wireless backhaul, moving network, cooperative communication, coordinated multi-points (CoMP), and interference cancellation
  • cloud RAN cloud radio access network
  • D2D Device to device communication
  • CoMP coordinated multi-points
  • FQAM Hybrid FSK and QAM Modulation
  • SWSC sliding window superposition coding
  • ACM Advanced Coding Modulation
  • FBMC Fan Bank Multi Carrier
  • NOMA non orthogonal multiple access
  • SCMA sparse code multiple access
  • a technique for performing phase alignment between antennas by acquiring phase information between antennas in advance is required.
  • This technique of utilizing phase alignment is called an antenna calibration technique.
  • Antenna correction techniques are commonly utilized when using beamforming (BF).
  • BF beamforming
  • the large-capacity multiple input / multi-output system uses a large-capacity antenna to increase the signal-to-noise ratio (SNR) of the transmitted / received signals in order to improve data transmission efficiency. It is standardized to dimension multiple-input multiple-output (FD-MIMO), and is also discussed as a key element technology in 5G communication systems.
  • SNR signal-to-noise ratio
  • the present invention provides an apparatus and method which may be time required for antenna correction in a large capacity multiple input / multi output system.
  • the present invention provides a method and apparatus for reducing the burden of the system by reducing the antenna correction time in a large capacity multiple input / multiple output system.
  • a method of correcting a phase of an antenna in a large capacity antenna system comprising: grouping the large capacity antennas into a predetermined number of groups; Establishing a path such that the grouped antenna ports have a feedback path; Adding a code or sequence having orthogonality to test signals to be output to each antenna port of each group; Separating a signal for each antenna port in the group using the orthogonal code or sequence from the signal received through the feedback path; And calculating a compensation value by detecting a phase change of the separated signal.
  • An apparatus is a device for phase correction of an antenna in a large-capacity antenna system, including antenna ports corresponding to each antenna, and including a feedback port grouped by the predetermined number of antennas.
  • Wireless unit A switching and A / D converter including transmission / reception switches corresponding to respective antenna ports of the radio unit and analog-to-digital converters corresponding to the transmission / reception switches; And controlling the setting of a path so that the grouped antenna ports have a feedback path, generating a test signal to be output to each antenna port of each group, and adding different codes or sequences having orthogonality to each generated test signal.
  • An apparatus is a device for phase correction of an antenna in a high-capacity antenna system, including a radio port corresponding to each antenna, and a wireless unit including a feedback port corresponding to each antenna port. ; Switching and A / D conversion including transmission / reception switches corresponding to respective antenna ports of the radio unit and analog-to-digital converters corresponding to the transmission / reception switches and receiving a signal output from the feedback ports. part; And a modem for generating and outputting a test signal to be output to each of the antenna ports, and detecting a phase change from a signal received through each feedback path to calculate a compensation value.
  • the use of a large capacity multiple input / multiple output system there is an advantage that can reduce the time required for antenna correction to reduce the burden on the system, and increase the efficiency of communication.
  • FIG. 1 is a functional block diagram of a large capacity multiple input / multi output (massive MIMO) antenna system.
  • FIG. 2 is a configuration diagram for correcting a reception phase of antennas in a large capacity multiple input / multi output antenna system.
  • FIG. 3 is a configuration diagram for correcting a transmission phase of antennas in a large capacity multiple input / multi output antenna system.
  • 4 is an output timing diagram of a test signal output for testing each antenna port in a modem.
  • FIG. 5 is a configuration diagram for correcting the transmission phase of the antennas in a large capacity multiple input / multiple output antenna system according to an embodiment of the present invention.
  • 6A and 6B are timing diagrams illustrating a case in which a test signal is transmitted for each group according to an exemplary embodiment of the present invention.
  • FIG. 7 is a control flowchart when a transmission phase of antennas is corrected in a large capacity multiple input / multi output antenna system according to an exemplary embodiment of the present invention.
  • FIG. 8 is a block diagram for correcting the transmission phase of the antennas in a large capacity multiple input / multiple output antenna system according to another embodiment of the present invention.
  • FIG. 9 is a block diagram for correcting the transmission phase of the antennas in a large capacity multiple input / multiple output antenna system according to another embodiment of the present invention.
  • FIG. 1 is a functional block diagram of a large capacity multiple input / multi output (massive MIMO) antenna system.
  • a large capacity multiple input / multi output antenna system includes a very large number of antennas.
  • Antennas 1, 2, 3,... , k-2, k-1, and k are connected to the radio unit 10 and are located at the terminal for transmitting / receiving a signal.
  • k representing the number of antennas may be a very large number.
  • the radio unit 10 has antennas 1, 2, 3,... , signals k-2, k-1, k, or antennas 1, 2, 3,... may include ports (not shown in FIG. 1) for receiving signals from k-2, k-1, and k.
  • the radio unit 10 converts a signal into a band required by a corresponding system and outputs the converted signal, and converts and outputs a signal received from a specific antenna or a plurality of antennas into a signal of an intermediate frequency or baseband. Configurations of the wireless unit 10 required for the description of the present invention will be described with reference to the drawings to be described later.
  • the switching and A / D converter 20 separates a path for transmitting a signal from a path for receiving a signal, switches the signal, converts an analog signal received from the radio unit 10 into a digital signal, and outputs the digital signal received from the modem. Convert to analog signal and output. Configuration of the switching and A / D conversion unit 20 required for the description of the present invention will also be described in more detail in the following drawings.
  • Modem 30 may be arranged in accordance with the invention in accordance with the respective antennas 1, 2, 3,. , and generates and outputs signals for processing k-2, k-1, and k, and controls the routing and routing of signals in the A / D converter 20 and the wireless unit 10.
  • the modem 30 has the antennas 1, 2, 3,...
  • the signals for correcting the phases of the antennas may be measured corresponding to the transmission path and the reception path with k-2, k-1, and k, and compensation may be performed according to the measured result.
  • the modem 30 may be configured in the form of a communication processor to control the above-described operation.
  • the modem 30 may include a memory for measuring a phase of a signal, storing measured information, and storing correction information.
  • the modem 30 does not include a memory, the above-described data may be stored or read in a separate memory (not illustrated in FIG. 1) provided externally. This specific operation will be described in more detail in the following drawings.
  • the controller 40 performs overall control of the base station. For example, the controller 40 controls transmission / reception of data and / or signals with a specific electronic device located in its cell. In addition, the controller 40 may perform scheduling for transmission / reception of data with a specific electronic device. In addition, the controller 40 may control to communicate with other devices connected to the upper network. Most of the control performed by the base station may be performed by the control unit 40. Since these control operations are well known, further description thereof will be omitted.
  • FIG. 2 is a configuration diagram for correcting a reception phase of antennas in a large capacity multiple input / multi output antenna system.
  • FIG. 2 lines corresponding to a reception operation are denoted by solid lines in order to explain measurement of a reception phase, and lines related to a transmission operation not related to reception of a signal are denoted by a dotted line.
  • a detailed operation of the transmission will be described in more detail with reference to the accompanying drawings.
  • each antenna port 11, 12, 13,... , 1k is basically the antennas 1, 2, 3,...
  • the signals received from k-2, k-1, and k may be output to the switching and A / D converter 20.
  • the wireless unit 10 transmits a test signal for a test to each antenna port 11, 12, 13,. And a feedback feedback port 101 for feedback back to 1k.
  • the configuration of the switching and A / D converter 20 will be described with reference to the antenna ports 11, 12, 13,. , Transmit / receive switches 211, 212, 213,... Corresponding to 1k. , 21k and A / D converters 221, 222, 223,... Contains 22k. Transmit / receive switches 211, 212, 213,... , 21k denotes each of the antenna ports 11, 12, 13,... , 1k and 1: 1 can be mapped. As illustrated in FIG. 2, the antenna port # 1 11 of the radio unit 10 corresponds to the transmit / receive switch # 1 211 of the switching and A / D converter 20, and the antenna port # 2 12 corresponds to the transmit / receive switch # 2 212.
  • Antenna port # 3 13 corresponds to transmit / receive switch # 3 213, and antenna port #k 1k corresponds to transmit / receive switch #k 21k.
  • the transmit / receive switches 211, 212, 213,... , 21k are the respective A / D converters 221, 222, 223,... Corresponds to 22k.
  • the respective A / D converters 221, 222, 223,... 22k may include a D / A converter for converting a digital signal to be transmitted therein into an analog signal and a band-up converter for band-up converting the converted analog signal.
  • a / D converters 221, 222, 223,... The 22k may include a band down converter for converting a high frequency signal of a band received therein into an intermediate frequency or baseband signal, and an A / D converter for converting a band down converted analog signal into a digital signal.
  • FIG. 2 a form including all of these components is illustrated as an A / D converter.
  • the modem 30 has its own A / D converters 221, 222, 223,... It may include a signal calculation unit or a signal calculation module corresponding to 22k.
  • compensation signal calculators 311, 312, 313,... , 31k is illustrated.
  • the modem 30 may include a reception port test signal transmitter 301 for generating and transmitting a reception port test signal.
  • Such a transmitter and a calculator may be configured by hardware modules, hardware logic, software, or firmware.
  • the reception port test signal transmitter 301 performs the antenna ports 11, 12, 13,.
  • a test signal for checking the phase of the received signal is generated and output to the switching and A / D converter 20.
  • the test signal is a signal previously known to the modem 30.
  • the test signal output from the reception port test signal generator 301 may be converted into an analog signal through one of the plurality of A / D converters, and may be band-up converted and output.
  • FIG. 2 illustrates a case in which the A / D converter #k 22k illustrated in the last example converts a digital test signal into an analog test signal, and performs band-up conversion. However, it may be output through another A / D converter illustrated in FIG. 2 or through a separate A / converter (not illustrated in FIG. 2).
  • a / D converter #k 22k is converted into an analog signal and output the test signal to the transmit feedback port 101.
  • Transmit feedback port 101 is each of the antenna ports 11, 12, 13,... It is connected to a feedback path for providing a signal at 1k. Therefore, the test signal output from the transmission feedback port 101 is applied to all antenna ports 11, 12, 13,... The same test signal is input at 1k. Accordingly, each antenna port 11, 12, 13,... , 1k may receive the same test signal at the same time.
  • the antenna ports 11, 12, 13,... , The test signal received at 1k is the transmit / receive switches 211, 212, 213,... Corresponding to the respective antenna ports. , 21k is entered.
  • the test signal can be switched to the reception route by the control of the modem 30 or by the control of the controller 40.
  • the lines of the drawing are complicated, these control lines are not shown, only the signal transmission / reception paths are shown.
  • the test signal connected to the receive path through 21k is then applied to the respective A / D converters 221, 222, 223,... , 22k.
  • the respective A / D converters 221, 222, 223,... , 22k is a band-down conversion of the test signal of the rising band, and then converted to a digital signal and output.
  • the signal output from 22k is returned to each antenna port compensation signal calculator 311, 312, 313,... , 31k.
  • Antenna port compensation signal calculators 311, 312, 313,... , 31k may detect the change in phase by using a known transmission signal after receiving the input test signal fed back. When the phase change is detected in this manner, the phase change in the reception path can be calculated by contrasting the phase of the received signal from the transmitted signal. Thus, the modem 30 may select the antenna ports 11, 12, 13,. , Phase correction may be performed for each antenna with respect to reception paths corresponding to 1k.
  • the compensation for the received signal can easily detect a phase change for each path through the feedback path by transmitting one signal.
  • the phase may be corrected from a table in which necessary phase correction values are stored for each reception path, or the phase of an antenna may be adjusted for each reception path through a preset correction operation.
  • FIG. 3 is a configuration diagram for correcting a transmission phase of antennas in a large capacity multiple input / multi output antenna system.
  • FIG. 3 unlike FIG. 2, the configuration for explaining the measurement of the transmission phase is indicated by the solid line corresponding to the transmission operation, and the lines related to the reception operation not related to the transmission of the signal are indicated by the dotted line.
  • the radio receiver 10 includes a reception feedback port 102, and each of the antenna ports 11, 12, 13,... , 1k is a path connected to the reception feedback port 102. That is, the signals output from the respective antenna ports are not directly output to the antenna, but are connected to the reception feedback port 102 configured for the test.
  • the modem 30 generates signals to be output to each antenna port and outputs the signals to the switching and A / D converter 20.
  • the configuration of the switching and A / D converter 20 has the same configuration as that of FIG.
  • the switching and A / D conversion section 20 is connected to the respective antenna ports 11, 12, 13,.
  • Transmit / receive switches 211, 212, 213,... Corresponding to 1k. , 21k and A / D converters 221, 222, 223,... Contains 22k.
  • Transmit / receive switches 211, 212, 213,... , 21k denotes each of the antenna ports 11, 12, 13,... , 1k and 1: 1 can be mapped.
  • the 22k may include a D / A converter for converting a digital signal to be transmitted into an analog signal and a band-up converter for band-up converting the converted analog signal, and the A / D converters 221, 222, 223, ...
  • the 22k may include a band down converter for converting a high frequency signal of a band received therein into an intermediate frequency or baseband signal, and an A / D converter for converting a band down converted analog signal into a digital signal.
  • Modem 30 has respective antenna ports 11, 12, 13,...
  • a signal for outputting at 1k is generated, and a test signal is sequentially generated corresponding to each antenna port and output.
  • the test signal is a signal that the modem 30 knows in advance.
  • each of the A / D converters 221, 222, 223,... , 22k converts the input test signal into an analog signal, and band-up converts the outputted test signal.
  • the respective A / D converters 221, 222, 223,... At 22k the transmit / receive switches 211, 212, 213,... Output is made by setting the transmission path to the antenna port at 21k. Then each antenna port 11, 12, 13,... At 1k, the transmission signal is fed back to the reception feedback port 102.
  • the receive feedback port 102 sends the input signal back to the A / D converters 221, 222, 223,. , 22k. 3 illustrates an example of inputting the A / D converter #k 22k shown at the end. Therefore, the A / D converter #k 22k converts the input signal back down, converts the analog signal into a digital signal, and outputs the signal to the modem 30.
  • the antenna ports of the radio unit 10 has a very large number of antenna ports corresponding to a very large number of antennas.
  • antenna ports 11, 12, 13,. We have only one port for feedback test signal from 1k. Therefore, when signals are transmitted to all the antenna ports at once, all the signals are input in a mixed state at the reception feedback port 102. Therefore, there is a problem in that it is not possible to distinguish which signal is input from the antenna port. Therefore, the modem 30 may output a test signal to be output to each antenna port in a continuous form in time.
  • the reason for leaving only one path of the reception feedback port 102 is to transmit a test signal to measure a phase, and when compensation is performed, a phase between each reception path. And to exclude additional considerations due to differences in amplitude.
  • 4 is an output timing diagram of a test signal output for testing each antenna port in a modem.
  • each antenna port 11, 12, 13,... , Test signals 401, 402, 403, ... sequentially in 1k. , 40k is outputted. That is, the test signal 401 for outputting to the antenna port # 1 11 is output from the modem 30 from the time point t0 to the time point t1, and the test signal for outputting to the second antenna port # 2 12 from the time point t11 to the time point t12. 402 is output from the modem 30, and a test signal 403 for outputting to the antenna port # 3 13 is output from the modem 30 from the time point t2 to the time point t3, and the time point t (k) from the time point t (k-1). So far, the test signal 40k for outputting to the k-th antenna port #k 1k is output from the modem 30.
  • the figure of FIG. 4 is illustrated without considering the time for changing the output path of some signals between the respective test signals.
  • each of the test signals is input from 1k to the form as shown in FIG. 4, and as a result, the input to the A / D converter 22k is the same. Accordingly, each antenna port 11, 12, 13,... For example, the phase of each antenna port can be measured by receiving a test signal for 1k.
  • FIG. 5 is a configuration diagram for correcting the transmission phase of the antennas in a large capacity multiple input / multiple output antenna system according to an embodiment of the present invention.
  • the basic block configuration may be understood to be the same as the configuration of FIGS. 2 and 3 described above.
  • grouping is performed in units of a plurality of antenna ports to process a transmission test signal.
  • antenna ports are shown in a form of two groups for convenience of description. However, unlike illustrated in FIG. 5, antenna ports may be grouped into two or more groups.
  • the respective antenna ports 11, 12,... , 1 (k-p-1) is formed in one group and is input to one receiving feedback port # 1 111. Also in another group of antenna ports 1 (k-p), 1 (k-p + 1),... , 1k is input to the other receiving feedback port # 2 112.
  • Each antenna port 11, 12,... , 1 (k-p-1), 1 (k-p), 1 (k-p + 1),... 1k denotes each of the transmit / receive switches 211, 212,... Included in the respective switching and A / D converters 20 as described above. , 21 (k-p), 21 (k-p + 1),... 1: 1 mapped to 21k.
  • each of the transmit / receive switches 211, 212,... , 21 (k-p), 21 (k-p + 1),... 21k represents the respective A / D converters 221, 222,. , 22 (k-p-1), 22 (k-p), 22 (k-p + 1),... , 1: 1 mapped with 22k.
  • the radio section 10 has a plurality of receiving feedback ports, such as the receiving feedback port # 1 111 and the receiving feedback port # 2, each of the receiving feedback ports 111 and 112 is an A / D converter in a corresponding group.
  • the path is set to output a signal to the channel.
  • the feedback path of the reception feedback port # 1 111 is input to the A / D converter 22 (k-p-1), and the feedback path of the reception feedback port # 2 112 is illustrated to be input to the A / D converter 22k.
  • the number of antennas and the number of antenna ports of the radio unit 10 are the same as those of FIG. 3.
  • the modem 30 may generate and output reference signals to the respective antenna ports grouped at the same time.
  • the present invention first corrects the average delay between the groups, and generates and outputs a transmission test signal. Orthogonal code for test signals to be transmitted to each port to transmit the same test signals at the same time point for phase correction corresponding to a path to each antenna port included in each group. Multiply by Therefore, the number of groups of antenna ports may be determined according to the number of codes having orthogonality with the number that can be processed at one time in response to transmission and reception of a test signal in the modem 30.
  • the modem 30 may include the antenna ports 11, 12,... Outputs a path of 1 (k-p-1) and multiplies the codes having orthogonality to each of the test signals to be fed back and outputs them simultaneously. Then each of the A / D converters 221, 222,... , 22 (k-p-1) converts the test signals multiplied by the orthogonal code into an analog signal, and outputs the band up. Accordingly, the respective A / D converters 221, 222,... , Transmit / receive switches corresponding to 22 (k-p-1) 211, 212,... , 21 (k-p-1) denotes the respective antenna ports 11, 12,... , 1 (k-p-1) is set to be inputted and output.
  • each antenna port 11, 12,... , 1 (k-p-1) outputs a signal to receive feedback port # 1 111.
  • the A / D converter 22 (k-p-1) converts the input signal to the band down and converts the analog signal into a digital signal and outputs the analog signal to the modem 30.
  • the modem 30 may include transmission port compensation signal calculators 501 and 502 corresponding to each group therein.
  • Each of the transmission port compensation signal calculators 501 and 502 included in the modem 30 may be implemented in a program form, in a logic form, or in a firmware form. Since the transmission port compensation signal calculators 501 and 502 perform the same operation, only one operation will be described.
  • the transmission port compensation signal calculation unit # 1 501 performs the antenna ports 11, 12,... , By receiving the test signals output as 1 (k-p-1) at once and multiplying each code again to remove each port 11, 12,... , 1 (k-p-1) can be distinguished from the output signal. This makes it easy to detect the phase change along the transmission path of the test signal for each port.
  • the second group of antenna ports 1 (k-p), 1 (k-p + 1),... , 1k output signals may use the same code as the code of the first group, may be configured to transmit the signal at the same time, and the signal for the test of the second group after the signal of the first group is transmitted You can also configure to send them at once.
  • the determination of this time point may be configured such that the test signal is transmitted with a predetermined time difference for each group according to the processing capability of the modem 30, or the test signal is simultaneously transmitted to each group.
  • a sequence or code that satisfies the above code sequence characteristics and can be code-divided and used as a test signal includes a Zadoff-Chu sequence, a Walsh code, and a Hadarmad sequence. Also, using the above sequences or codes, a phase response for each antenna can be calculated as in Equation 1 below.
  • Equation 1 Is a test signal corresponding to the k th frequency of the m th antenna among the test signals, Is the phase response corresponding to the kth subcarrier of the mth antenna. Transmitted at the same time on each antenna The sum of the antennas at the receiving end is a signal received through the k-th frequency is expressed as Equation (1).
  • Equation 2 the code sequence of Equation 1 is established according to the following Equation 2.
  • Equation 1 and Equation 2 the response of the k th subcarrier of the m th antenna is Can be calculated. Only the response of the kth subcarrier of the mth antenna Since is a value calculated by the accumulation of subbands, the subcarriers of the number of tones (Ntone) are the same. Should be applied. In other words, it is necessary to assume that the antenna phase characteristic is flat within the number of tones of subbands. Accordingly, it may be determined as in Equation 3 below.
  • 6A and 6B are timing diagrams illustrating a case in which a test signal is transmitted for each group according to an exemplary embodiment of the present invention.
  • a test signal is transmitted from a time point t0 to a time point t1 to all ports without division of the ports divided into groups.
  • each test signal is multiplied by a code having different orthogonality in the group divided by port. That is, the test signal 601 outputted to the antenna port # 1 11 and the test signal 602 outputted to the antenna port # 2 12 are the same test signals, but codes having different orthogonalities are multiplied.
  • Such code may use CDM code. In this case, the same codes may be used between groups.
  • an orthogonal code multiplied by a signal output to antenna port # 1 11 and an orthogonal code multiplied by antenna port # k-p 1 (k-p) may be the same code. That is, the orthogonal code can be reused for each group.
  • 6A is a timing diagram illustrating a case in which a test signal is transmitted from antenna port # 1 11 to antenna port #k at once using FIG. 6A.
  • a time point at which a test signal is transmitted for each group is different. That is, antenna ports 11, 12,... Each test signal output as 1k-p-1 is transmitted from the time point t0 to the time point t1.
  • the respective test signals 601, 602,... 60k-p-1 is a signal multiplied by codes having different orthogonalities, for example, CDM codes may be multiplied.
  • test signals may be transmitted and feedback with respect to the antenna ports of the first group, thereby checking the phase change for each path of each antenna port and performing compensation corresponding to each.
  • antenna port 1 (k-p), 1 (k-p + 1),... which is the second group from the time t21 to the time t22.
  • Each test signal output in 1k is transmitted.
  • the test signals 60k-p, 60k-p + 1,... 60k is a signal multiplied by codes having different orthogonalities, for example, CDM codes may be multiplied.
  • the same code since the first group and the second group are different groups, the same code may be used. For example, an orthogonal code multiplied by a signal output to antenna port # 1 11 and an orthogonal code multiplied by antenna port # k-p 1 (k-p) may be the same code. That is, the orthogonal code can be reused for each group.
  • the test signal is transmitted and fed back to the antenna ports of the second group, and the phase change of each antenna port is examined. Compensation corresponding to may be performed.
  • only one receiving feedback port may be configured in FIG. 5. That is, it is possible to use only one receiving feedback port, and to configure the grouping for each antenna port to be the same, and to configure the test signal to be transmitted at different times for each group.
  • An advantage of transmitting as in the case of FIG. 6B is that the present invention can be applied when it is difficult to additionally configure the feedback port in the radio unit 10. The physical configuration of FIG. 6B will be described later with reference to FIG. 8.
  • FIG. 7 is a control flowchart when a transmission phase of antennas is corrected in a large capacity multiple input / multi output antenna system according to an exemplary embodiment of the present invention.
  • the flowchart of FIG. 7 may be performed by the controller 40 or may be performed by the modem 30.
  • the modem 30 may be performed by the controller 40 or may be performed by the modem 30.
  • a description will be given of a case made in the modem 30 for convenience of description.
  • the modem 30 controls to set the feedback path of the test signal in step 700. That is, in Fig. 5, the transmit / receive switches 211, 212,... , 21 (k-p-1), 21 (k-p), 21 (k-p + 1),... Set the 21k transmit / receive switch path to be the transmit path.
  • the modem 30 controls the antenna ports 11, 12, and 1 (kp-1) to be connected to the reception feedback port # 1 111 in step 700, and the antenna ports 1 (kp) and 1 (k- p + 1),... Up to 1k antenna ports perform switching to connect to receive feedback port # 2 112.
  • step 710 the modem 30 compensates an average delay of antenna paths for each group between the transmit / receive switch and the radio unit 10. For example, if a delay between the feedback path to the reception feedback port # 1 111 and the feedback path to the reception feedback port # 2 112 is different, the corresponding value is compensated. For example, when the feedback path to the reception feedback port # 1 111 has a speed 0.1 ms faster than the feedback path to the reception feedback port # 2 112, the signal to the reception feedback port # 1 111 may be delayed by 0.1 ms and output. Alternatively, the delay time may be compensated for in the received signal. It is noted that step 710 is a step of recognizing a compensation value for each feedback path in advance.
  • the modem 30 After compensating for the delay of step 710, the modem 30 proceeds to step 720 and transmits a test signal multiplied by an orthogonal code to all antenna ports. That is, as illustrated in FIG. 6A, signals are transmitted to all ports, and the transmitted signals are output as multiplied by orthogonal codes or sequences as described above. Therefore, when a signal is transmitted in step 720, the A / D converters 221, 222,... , 22 (k-p-1), 22 (k-p), 22 (k-p + 1),... , 22k and transmit / receive switches 211, 212,... , 21 (k-p-1), 21 (k-p), 21 (k-p + 1),... Corresponding antenna ports 11, 12,...
  • 1 (k-p-1), 1 (k-p), 1 (k-p + 1),... , 1k is outputted to corresponding receive feedback ports 111 and 112.
  • the feedback ports are fed back to modem 30 via the reconnected A / D converters 22 (k-p-1), 22k.
  • the modem 30 may be in a state where all signals are transmitted at the same time or time compensation is performed. If the time compensation is performed without performing the time compensation, the modem 30 performs the time compensation using the received signal. Then, the signal for each antenna port is separated from the signal received for each feedback port. This separation may use Equation 3 described above. After separating the signals, the modem 30 proceeds to step 740 to detect or calculate the phase change of each antenna port from the separated signals.
  • the modem 30 may detect a phase change for each antenna for each of the signals separated in operation 740, and generate a correction value of the transmission signal based on the phase change detected in operation 750.
  • FIG. 8 is a block diagram for correcting the transmission phase of the antennas in a large capacity multiple input / multiple output antenna system according to another embodiment of the present invention.
  • the wireless part 10 of FIG. 8 has the same configuration as the case of FIG. 3 described above.
  • the configuration of the switching and A / D converter 20 also has the same configuration as that of FIG.
  • antennas that is, antenna ports are grouped as shown in FIG. 5, and a signal is transmitted to the grouped antenna ports. Therefore, the test signal needs to be transmitted in time division for the antenna ports grouped as shown in FIG. 6B. Compensation for the antenna port for each group can be used as described in FIG.
  • FIG. 9 is a block diagram for correcting the transmission phase of the antennas in a large capacity multiple input / multiple output antenna system according to another embodiment of the present invention.
  • FIG. 9 illustrates a case in which reception feedback ports are included in each antenna port.
  • a reception feedback port # 1 121 corresponding to the antenna port # 1 11 is connected, a reception feedback port # 2 122 corresponding to the antenna reception port # 2 12 is connected, and an antenna Receive feedback port #k 12k corresponding to port #k is connected.
  • the receiving feedback ports 121, 122,... , 12k, and each of the feedback ports 121, 122,... 12k denotes the corresponding antenna port and corresponding A / D converters 221, 222,. Connect to return the signal to 22k.
  • the modem 30 has transmission port compensation signal calculators 901, 902,... Corresponding to each antenna port therein. , May include 90k. Also, the transmission port compensation signal calculators 901, 902,... As described above, 90k may be configured as separate logic, program, or firmware.
  • the load of the wireless unit 10 and the switching and A / D converter 20 may be increased in a large capacity multiple input / multi output antenna system.
  • modem 30 may need to account for the delay of each transmission path for each antenna port, so additional calculations may be needed. The overall burden on the system increases.
  • the configuration as shown in FIG. 9 requires a code having an orthogonality since an additional operation such as multiplying a code or a sequence and removing the signal from a received signal is not required when generating a signal to test a transmission path. I never do that.
  • the measurement can be performed for each subcarrier without accumulating in a subband manner.
  • the advantages of each method described above will be summarized.
  • the Tx calibration processing time that is linearly increased according to the number of antennas is divided according to the code group. This can be reduced by the number of groups or the number of feedback ports.
  • the compensation processing time is ⁇ for each transmission path. Therefore, in FIG. 5, the generalized case is composed of L groups instead of two feedback loops.
  • the total number of antennas is assumed to be NTx.
  • Table 1 according to embodiments of the present invention, as shown in FIG. 3, there is an advantage in that the time required for calibration, which must be performed for each antenna port, can be reduced efficiently.
  • the present invention can be used in a large capacity antenna system.

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  • Mobile Radio Communication Systems (AREA)
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Abstract

La présente invention se rapporte à un système de communication 5G ou pré-5G permettant de prendre en charge un débit de transfert de données supérieur à celui d'un système de communication 4G, tel qu'un système LTE. Selon un mode de réalisation de l'invention, un procédé de correction de phase d'une antenne dans un système d'antennes de grande capacité comprend les étapes consistant : à regrouper des antennes de grande capacité en un nombre prédéterminé de groupes ; à établir un trajet de telle sorte que les ports des antennes groupées disposent d'un trajet de rétroaction ; à délivrer un signal d'essai à délivrer à chacun des ports d'antenne de chaque groupe par ajout d'une séquence ou d'un code doté d'une orthogonalité ; à séparer des signaux de chaque port d'antenne dans le groupe à l'aide d'une séquence ou d'un code doté de l'orthogonalité dans un signal reçu par l'intermédiaire du trajet de rétroaction ; et à calculer une valeur de compensation par détection d'un changement de phase du signal séparé. La présente recherche a été réalisée avec le soutien du " Projet GiGA Corée interministériel " du Ministère de la Science, des TIC et de la Futurologie, de la République de Corée.
PCT/KR2017/002745 2016-12-23 2017-03-14 Procédé et appareil de correction de phase d'antenne dans un système d'antennes de grande capacité Ceased WO2018117335A1 (fr)

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KR20160177809 2016-12-23
KR10-2016-0177809 2016-12-23
KR1020170018454A KR102520406B1 (ko) 2016-12-23 2017-02-10 대용량 안테나 시스템에서 안테나 위상 보정 방법 및 장치
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WO2025082202A1 (fr) * 2023-10-19 2025-04-24 华为技术有限公司 Procédé de correction de phase et dispositif de communication

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