WO2016183957A1 - Procédé et dispositif pour réduction d'ordre canal d'antenne - Google Patents

Procédé et dispositif pour réduction d'ordre canal d'antenne Download PDF

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Publication number
WO2016183957A1
WO2016183957A1 PCT/CN2015/088121 CN2015088121W WO2016183957A1 WO 2016183957 A1 WO2016183957 A1 WO 2016183957A1 CN 2015088121 W CN2015088121 W CN 2015088121W WO 2016183957 A1 WO2016183957 A1 WO 2016183957A1
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WIPO (PCT)
Prior art keywords
antenna
antenna channel
channel
compensation factor
downlink
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PCT/CN2015/088121
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English (en)
Chinese (zh)
Inventor
张玉杰
宋连坡
李刚
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中兴通讯股份有限公司
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Publication of WO2016183957A1 publication Critical patent/WO2016183957A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/10—Monitoring; Testing of transmitters
    • H04B17/11—Monitoring; Testing of transmitters for calibration
    • 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
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/0842—Weighted combining
    • H04B7/086—Weighted combining using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/04—Arrangements for maintaining operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0404—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas the mobile station comprising multiple antennas, e.g. to provide uplink diversity

Definitions

  • the present invention relates to an antenna channel management technology in wireless communication, and in particular, to a method and apparatus for reducing a frequency of an antenna channel.
  • Smart antenna technology which is a space division technology, has become the most attractive technology after frequency division multiplexing, time division multiplexing and code division multiplexing.
  • TD-LTE Time Division Long Term Evolution
  • a small inter-cell spacing is introduced on the base station side.
  • Antenna beamforming technology In order to ensure the correctness and reliability of beamforming, antenna calibration of smart antennas has become a key application technology. Specifically, the base station can reduce the amplitude and phase error of each channel of the antenna array by the calibration of the smart antenna to ensure the correctness and reliability of the beamforming.
  • the baseband processing unit (BBU) of the base station performs the processing of the baseband signal
  • the radio remote unit (RRU) of the base station implements radio frequency processing and signal amplification, and between the RRU and the BBU.
  • Connected via fiber optics When the individual antenna channels are faulty, the preset antenna channel number is skipped and decremented, and the faulty antenna channel is blocked, so that the faulty antenna channel is out of operation (ie, excluded from the antenna array), and the antenna array is lowered. The order makes the faulty antenna channel closed, thereby reducing the shape of the beam and ensuring the normal operation of the service.
  • the base station 8 antenna array when the base station detects that an antenna channel is faulty, it directly drops to the 4 antenna array to close the faulty antenna channel; when some antennas in the 4 antenna array fail At that time, drop to the 2 antenna array to close the faulty antenna channel.
  • the number of antenna channels is reduced in a leaping manner, and when the antenna channel is reduced, the number of antenna channels is leaped and decreased, which may result in system performance degradation.
  • the existing antenna reduction technique is used, and the base station needs to span multiple antenna arrays of multiple matrix dimensions, and the price reduction is relatively expensive; or the base station needs to support the maximum number of antennas.
  • the base station needs to support antenna arrays of 1, 2, 3, ... 64 dimensions, which is unbearable and achievable for the base station.
  • the embodiment of the present invention is to provide a method and a device for reducing the order of an antenna channel, which can easily implement an antenna channel reduction-order elimination antenna without affecting the performance of the base station system and without changing the dimension of the antenna matrix.
  • the influence of the channel on the beamforming ensures the normal operation of the service.
  • the embodiment of the invention provides a method for reducing the order of an antenna channel, and the method includes:
  • the antenna channel is detected
  • the first antenna channel calibration compensation factor corresponding to the first antenna channel is set to 0;
  • the calibration compensation factor matrix includes the first antenna channel calibration compensation factor and the second antenna channel calibration compensation factor.
  • the antenna calibration includes uplink antenna channel calibration and downlink antenna channel calibration
  • the antenna channel is detected, including:
  • the method further includes:
  • the method further includes:
  • the first antenna channel is an uplink antenna channel i
  • the first antenna channel calibration compensation factor is an uplink antenna channel calibration compensation factor A i corresponding to the uplink antenna channel i , where i ⁇ 0 , 1, 2, 3...K-1 ⁇ ;
  • the first antenna channel calibration compensation factor corresponding to the first antenna channel is set to 0, including:
  • the uplink antenna channel calibration compensation factor A i 0 is set.
  • the first antenna channel is a downlink antenna channel j, or the first antenna channel is a downlink antenna channel j and an uplink antenna channel j;
  • the first antenna channel calibration compensation factor is an uplink antenna channel calibration compensation factor A j corresponding to the uplink antenna channel j and a downlink antenna channel calibration compensation factor B j corresponding to the downlink antenna channel j , where j ⁇ 0 , 1, 2, 3...K-1 ⁇ ;
  • the first antenna channel calibration compensation factor corresponding to the first antenna channel is set to 0, including:
  • the first antenna channel is a downlink antenna channel j
  • the first antenna channel calibration compensation factor is a downlink antenna channel calibration compensation factor B j corresponding to the downlink antenna channel j , where j ⁇ 0 , 1, 2, 3...K-1 ⁇ ;
  • the first antenna channel calibration compensation factor corresponding to the first antenna channel is set to 0, including:
  • the downlink antenna channel calibration compensation factor B j 0 is set.
  • An embodiment of the present invention provides a reduced-order device for an antenna channel, where the device includes:
  • the detecting unit is configured to detect the antenna channel when performing antenna calibration
  • a setting unit configured to: when the detecting unit detects the first antenna channel that has a fault, set a first antenna channel calibration compensation factor corresponding to the first antenna channel to 0;
  • the setting unit is further configured to: when the detecting unit detects the second antenna channel that does not have a fault, set a second antenna channel calibration compensation factor corresponding to the second antenna channel to be unchanged;
  • the adjusting unit is configured to adjust the shaping weight of the antenna according to the antenna channel calibration compensation factor matrix set by the setting unit, so that the antenna corresponding to the first antenna channel calibration compensation factor set by the setting unit is used on the antenna The weighting of the antenna is reduced to 0, and the antenna channel calibration compensation factor matrix includes the first antenna channel calibration compensation factor and the second antenna channel calibration compensation factor set by the setting unit.
  • the antenna calibration includes uplink antenna channel calibration and downlink antenna channel calibration
  • the device further includes: an acquiring unit;
  • the first antenna channel detected by the detecting unit is an uplink antenna channel i
  • the first antenna channel calibration compensation factor acquired by the acquiring unit is an uplink antenna channel corresponding to the uplink antenna channel i Calibrating the compensation factor A i , where i ⁇ ⁇ 0, 1, 2, 3, ... K-1 ⁇ ;
  • the first antenna channel detected by the detecting unit is a downlink antenna channel j, or the first antenna channel detected by the detecting unit is a downlink antenna channel j and an uplink antenna channel j;
  • the first antenna channel calibration compensation factor obtained by the acquiring unit is an uplink antenna channel calibration compensation factor A j corresponding to the uplink antenna channel j and a downlink antenna channel calibration compensation factor B j corresponding to the downlink antenna channel j , Where j ⁇ 0, 1, 2, 3...K-1 ⁇ ;
  • the first antenna channel detected by the detecting unit is a downlink antenna channel j
  • the first antenna channel calibration compensation factor acquired by the acquiring unit is a downlink antenna channel corresponding to the downlink antenna channel j Calibrating the compensation factor B j , where j ⁇ ⁇ 0, 1, 2, 3, ... K-1 ⁇ ;
  • the detecting unit, the setting unit, the adjusting unit, and the obtaining unit adopt a central processing unit (CPU), a digital signal when performing processing.
  • CPU central processing unit
  • a processor DSP, Digital Singnal Processor
  • FPGA programmable logic array
  • the antenna channel reduction device corrects the compensation factor matrix according to the antenna channel and performs antenna compensation on the antenna in the antenna array
  • the antenna channel calibration factor corresponding to the faulty antenna channel is 0. Therefore, the subcarriers on the probe signal received by the antenna channel using the fault are all 0 (the frequency domain data is all 0), so that the channel estimation of the normalized fault antenna corresponds to 0, and the calculated The faulty antenna channel corresponds to a weighted value of zero.
  • the data of the shaped data on the faulty antenna is 0, so that the base station antenna can not affect the performance of the base station system and does not change. Based on the dimension of the antenna matrix, it is easier to reduce the influence of the antenna channel reduction to eliminate the faulty antenna channel on the beamforming, and ensure the normal operation of the service.
  • FIG. 1 is a structural block diagram of an implementation of an embodiment of the present invention.
  • FIG. 2 is a flowchart 1 of a method for reducing a channel of an antenna channel according to an embodiment of the present invention
  • FIG. 3 is a second flowchart of a method for reducing a channel of an antenna channel according to an embodiment of the present disclosure
  • FIG. 4 is a schematic structural diagram 1 of a reduced-order device for an antenna channel according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram 2 of a reduced-order device for an antenna channel according to an embodiment of the present invention.
  • OFDM Orthogonal Frequency Division Multiplexing
  • MIMO multiple input multiple output
  • beamforming is one of the most important and most common techniques for making full use of diversity gain, array gain, and interference suppression gain to improve system performance and improve spectral efficiency.
  • the beamforming technology is an antenna array-based signal processing technology, which generates a directional beam by adjusting weighting coefficients of each array element in the antenna array, thereby obtaining a significant array gain.
  • the beamforming technology is applied to the intelligent multi-antenna transmission technology of small-pitch antenna arrays.
  • the main principle is to generate strong directional radiation patterns by using the strong correlation of spatial channels and the interference principle of waves, so that the main lobe of the radiation pattern is adaptive.
  • the ground points to the user's incoming wave direction, thereby increasing the signal to noise ratio, increasing system capacity or coverage.
  • the signal is generally processed in the baseband unit, but the RF channel also belongs to a part of the wireless channel, which will cause the signal from the baseband unit to the RF unit to the wireless port process.
  • Many factors such as power amplifiers, filters, fiber optic cables, and temperature, can make the system's uplink and downlink wireless channels not maintain good consistency.
  • each antenna channel should be calibrated.
  • the conventional calibration is time domain calibration by the RRU.
  • the BBU performs frequency domain calibration to compensate for each channel. The phase difference and the amplitude difference are used to improve the accuracy of the calibration.
  • the reduced-order device 1 of the antenna channel in the embodiment of the present invention is disposed in the BBU or is a module connected to the BBU, and is implemented by the present invention. There are no restrictions on the case.
  • the BBU 2 is connected to the RRU 3 through an optical fiber, and the RRU is connected to the antenna array 5 through the antenna coupling disk 4.
  • An embodiment of the present invention provides a method for reducing the order of an antenna channel. As shown in FIG. 2, the method may include:
  • antenna calibration is performed by a reduced-order device of the antenna channel.
  • the antenna calibration is generally divided into three phases: (1) antenna phase amplitude estimation (amplitude estimation of the channel by transmitting and receiving training sequences); (2) state judgment of the antenna channel ( Determine whether the state of the antenna channel satisfies the condition of amplitude and phase adjustment); (3) Adjust the channel amplitude and phase (adjust the amplitude and phase of each antenna channel to be consistent according to certain rules).
  • the antenna calibration is designed to adjust the amplitude of each antenna channel.
  • the BBU can assist the BBU to complete the fault detection and judgment of the antenna channel.
  • the antenna channel calibration compensation factor (calibration) is used by means of the antenna calibration process. The coefficient) is used to implement a faulty antenna channel with a weighted weight of zero, thereby eliminating the effect of the faulty antenna on the beamforming of the antenna array.
  • embodiments of the present invention are applicable to any situation where antenna calibration can be performed and the smart antenna utilizes beamforming techniques.
  • the uplink antenna and the downlink antenna in the antenna array have the same number of uplink antennas and downlink antennas. Therefore, the uplink antenna channel and the downlink antenna channel correspond to each other.
  • the reduced channel device of the antenna channel can detect the uplink antenna channel first, and then detect the downlink antenna channel.
  • the antenna channel calibration device when the antenna channel calibration device performs antenna calibration, the amplitude, power, and hardware of the antenna channel can be detected.
  • the specific detection method is the prior art.
  • the embodiments of the present invention are not described herein.
  • an embodiment of the present invention implements an antenna channel calibration compensation factor (calibration coefficient) in an antenna calibration process to implement a weighted weight value of 0 in a faulty antenna channel, where the weighted weight is
  • the weighted objects are uplink service data (uplink received data) and downlink service data (downlink broadcast data), so that the data of the faulty antenna channel is 0, and the service operation of the faulty antenna channel is stopped to ensure the unfaulted antenna channel.
  • the business is running normally.
  • the uplink receiving service data is 0 on the faulty uplink antenna channel
  • the correct uplink demodulation is performed by using the received signals of other unfailed uplink antenna channels without changing the uplink receiving operation matrix, thereby causing faulty
  • the effects of the upstream antenna channel are minimized.
  • the downlink antenna channel calibration compensation factor corresponding to the faulty downlink antenna channel is 0, so that the broadcast data of the downlink broadcast antenna channel on the faulty downlink antenna is 0, thereby minimizing the influence of the faulty downlink antenna channel.
  • the antenna channel calibration compensation factor corresponding to each antenna channel is obtained during the antenna calibration process, and the reduced-order device of the antenna channel detects the faulty
  • the first antenna channel calibration compensation factor corresponding to the first antenna channel may be set to zero.
  • each antenna in the antenna array constitutes an antenna channel calibration compensation factor matrix.
  • each antenna is multiplied by its corresponding antenna channel calibration compensation factor to compensate for the difference in amplitude and phase between the antennas, ie, amplitude and phase adjustment.
  • the embodiment of the present invention may be configured to make the fault antenna in the beamforming process.
  • the weighting weight on the value is 0, and the final number of shapings is reached. According to the purpose of 0.
  • the antenna channel reduction device detects that the power value of the uplink antenna channel i is abnormal, and then the antenna channel calibration compensation factor corresponding to the uplink antenna channel i is used. It is set to 0.
  • i is numbered from 0, where i ⁇ ⁇ 0, 1, 2, 3, ..., K-1 ⁇ , and the specific numbering starts, which is not limited in the embodiment of the present invention.
  • the antenna channel calibration compensation factor for the detected non-faulty antenna channel does not need to change the antenna channel calibration compensation factor obtained when the antenna calibration is performed. Therefore, when the reduced-order device of the antenna channel detects the second antenna channel without the fault, the reduced-order device of the antenna channel may not change the second antenna channel calibration compensation factor corresponding to the second antenna channel.
  • S102 and S103 are optional steps after S101, and one step is selected according to the actual detection situation; that is, in the embodiment of the present invention, after S101, S102 may be executed, or S103 may be executed.
  • the order of execution may be determined according to the actual situation, and is not limited in the embodiment of the present invention.
  • the compensation factor matrix includes the first antenna channel calibration compensation factor and the second antenna channel calibration compensation factor.
  • the antenna channel reduction device performs antenna compensation on the antenna in the antenna array according to the antenna channel calibration compensation factor matrix.
  • the first antenna channel calibration factor is 0, the first The subcarriers on the received probe signal of the antenna channel are all 0 (the frequency domain data is all 0), so that the channel estimation of the normalized first antenna corresponds to 0, and the calculated corresponding to the first antenna channel The weighting weight is 0.
  • the shape weight matrix is multiplied and the data of all the space users is mapped to the antenna array, the data of the shaped data on the first antenna is 0, so that the normal operation of the service data on other antennas in the antenna array is not affected.
  • the antenna channel reduction device detects that the power value of the uplink antenna channel i is abnormal, and the antenna channel calibration compensation factor corresponding to the uplink antenna channel i is 0. Therefore, those skilled in the art can understand that the subcarriers on the detection signal received by using the uplink antenna channel i are all 0, so that the i+1th column in the channel estimation matrix of the normalized uplink antenna i is all 0. Further, the i+1th row in the shape of the weighting matrix of the uplink antenna channel i is all 0.
  • the data of the shaped data on the antenna i is 0, that is, substantially K-1 antennas normally perform service data. Does not affect the normal operation of the traffic data on other K-1 antennas in the antenna array; where i ⁇ ⁇ 0, 1, 2, 3, ... K-1 ⁇ .
  • failure of the uplink antenna channel and the failure of the downlink antenna channel may be classified into three types. The specific process will be described in the following embodiments.
  • the method for reducing the order of the antenna channel detects the antenna channel by performing antenna calibration; and detects the first antenna channel corresponding to the first antenna channel when the faulty first antenna channel is detected.
  • the factor is set to 0; when the second antenna channel without the fault is detected, the second antenna channel calibration compensation factor corresponding to the second antenna channel is set to be unchanged; and the shaping right of the antenna is adjusted according to the antenna channel calibration compensation factor matrix
  • the value is such that the shaping weight on the antenna corresponding to the first antenna channel calibration compensation factor is 0, and the antenna is reduced in order.
  • the antenna channel reduction device corrects the compensation factor matrix according to the antenna channel and performs antenna compensation on the antenna in the antenna array
  • the antenna channel calibration factor corresponding to the faulty antenna channel is 0. Therefore, the subcarriers on the probe signal received by the antenna channel using the fault are all 0 (the frequency domain data is all 0), so that the channel estimation of the normalized fault antenna corresponds to 0, and the calculated The corresponding antenna channel is shaped The weight is 0.
  • the data of the air separation user is mapped to the antenna array by multiplication with the weighting matrix, the data of the shaped data on the faulty antenna is 0, so that the base station antenna can not affect the performance of the base station system and does not change. Based on the dimension of the antenna matrix, it is easier to reduce the influence of the antenna channel reduction to eliminate the faulty antenna channel on the beamforming, and ensure the normal operation of the service.
  • An embodiment of the present invention provides a method for reducing the order of an antenna channel. As shown in FIG. 3, the embodiment of the present invention is described by using a reduced-order device of an antenna channel as an execution subject, and the method may include:
  • the antenna calibration is generally divided into three phases: (1) antenna phase amplitude estimation (amplitude estimation of the channel by transmitting and receiving training sequences); (2) state judgment of the antenna channel ( Determine whether the state of the antenna channel satisfies the condition of amplitude and phase adjustment); (3) Adjust the channel amplitude and phase (adjust the amplitude and phase of each antenna channel to be consistent according to certain rules).
  • the antenna calibration is designed to adjust the amplitude of each antenna channel.
  • the BBU can assist the BBU to complete the fault detection and judgment of the antenna channel.
  • the antenna channel calibration compensation factor (calibration) is used by means of the antenna calibration process. The coefficient) is used to implement a faulty antenna channel with a weighted weight of zero, thereby eliminating the effect of the faulty antenna on the beamforming of the antenna array.
  • the uplink antenna channel is a receiving channel and can receive signals.
  • embodiments of the present invention are applicable to any situation where antenna calibration can be performed and the smart antenna utilizes beamforming techniques.
  • the uplink antenna and the downlink antenna in the antenna array have the same number of uplink antennas and downlink antennas. Therefore, the uplink antenna channel and the downlink antenna channel correspond to each other.
  • the reduced channel device of the antenna channel can detect the uplink antenna channel first, and then detect the downlink antenna channel.
  • a k is a parameter representation of the uplink antenna channel calibration compensation factor used in the embodiment of the present invention, and may also be other representation symbols.
  • the specific uplink antenna channel calibration compensation factor is not limited in the embodiment of the present invention.
  • the reduced channel device of the antenna channel detects the uplink antenna channel.
  • the reduced-order device of the antenna channel can detect the amplitude, power, hardware, and the like of the uplink antenna channel.
  • the specific detection mode is the prior art, and is not described in the embodiment of the present invention.
  • the antenna channel calibration compensation factor A k corresponding to each uplink antenna channel is obtained during the uplink antenna calibration process, and the antenna channel is reduced by the device.
  • the shaping weight of the uplink antenna channel j is adjusted, that is, the uplink antenna channel i can be
  • the corresponding uplink antenna channel calibration compensation factor A i is set to 0; where i ⁇ ⁇ 0, 1, 2, 3, ... K-1 ⁇ .
  • each antenna in the antenna array constitutes an antenna channel calibration compensation factor matrix.
  • each antenna is multiplied by its corresponding antenna channel calibration compensation factor to compensate for the difference in amplitude and phase between the antennas. Different, that is, amplitude and phase adjustment.
  • the first antenna channel in the previous embodiment is the uplink antenna channel i
  • the first antenna channel calibration compensation factor in the previous embodiment is the uplink antenna channel calibration compensation factor A i corresponding to the uplink antenna channel i .
  • the embodiment of the present invention may be configured to make the fault antenna in the beamforming process.
  • the weighting weight on the top is 0, and the final shaping data is 0.
  • the antenna channel reduction device when the antenna channel reduction device detects that multiple antenna channels are faulty, the antenna channel reduction device sets the multiple antenna channel calibration compensation factors corresponding to the multiple failed antenna channels. Is 0.
  • the antenna channel reduction device detects that the power value of the uplink antenna channel i is abnormal, and then the antenna channel calibration compensation factor corresponding to the uplink antenna channel i is used.
  • a i is set to 0; embodiment of the present invention, numbered from I 0, wherein, i ⁇ ⁇ 0,1,2,3 & K-1 ⁇ , the initial number of specific embodiments of the present invention is not limited.
  • the uplink antenna channel calibration compensation factor A t corresponding to the uplink antenna channel t is set to be unchanged; wherein, t ⁇ 0, 1, 2, 3...K-1 ⁇ .
  • the uplink antenna channel calibration compensation factor A t of the detected uplink channel t without failure is an antenna channel calibration acquired when the antenna calibration is not necessary. Compensation factor. Therefore, when the reduced-order device of the antenna channel detects the uplink antenna channel t that does not have a fault, the reduced-order device of the antenna channel may not change the uplink antenna channel calibration compensation factor A t corresponding to the uplink antenna channel t , where t ⁇ ⁇ 0, 1, 2, 3... K-1 ⁇ .
  • t is numbered from 0, where t ⁇ ⁇ 0, 1, 2, 3, ..., K-1 ⁇ , The specific numbering starts, and the embodiment of the present invention is not limited.
  • S203 and S204 are optional steps after S202, and one step is selected according to the actual detection situation; that is, in the embodiment of the present invention, after S202, S203 may be performed, or S204 may be executed.
  • the order of execution may be determined according to the actual situation, and is not limited in the embodiment of the present invention.
  • the uplink antenna and the downlink antenna in the antenna array have the same number of uplink antennas and downlink antennas. Therefore, the uplink antenna channel and the downlink antenna channel correspond to each other.
  • the down-conversion device of the antenna channel can detect the uplink antenna channel first, and then complete the setting of the uplink antenna channel calibration compensation factor, and then detect the downlink antenna channel.
  • the downlink antenna channel is a transmission channel, and the signal can be transmitted.
  • B k is a parameter representation of the downlink antenna channel calibration compensation factor used in the embodiment of the present invention, and may also be other representation symbols.
  • the specific downlink antenna channel calibration compensation factor is not limited in the embodiment of the present invention.
  • the reduced channel device of the antenna channel detects the downlink antenna channel.
  • the reduced-order device of the antenna channel detects the K downlink antenna channels corresponding to the K downlink antennas.
  • the reduced-order device of the antenna channel can detect the amplitude, power, hardware, and the like of the downlink antenna channel.
  • the specific detection mode is the prior art, and is not described in the embodiment of the present invention.
  • the first antenna channel in the previous embodiment is the downlink antenna channel j
  • the first antenna channel calibration compensation factor in the previous embodiment is the uplink antenna channel calibration compensation factor A j corresponding to the uplink antenna channel j.
  • the downlink antenna channel calibration compensation factor B j corresponding to the downlink antenna channel j .
  • the antenna channel calibration compensation factor B k corresponding to each downlink antenna channel is obtained during the downlink antenna calibration process, and the antenna channel is reduced by the device.
  • the uplink antenna channel calibration compensation factor A j that can be the same number as the downlink antenna channel j is set to 0, and the downlink antenna channel calibration compensation factor B j corresponding to the downlink antenna channel j is set.
  • the uplink antenna channel calibration compensation factor A j that can be the same number as the downlink antenna channel j is set to 0, and the downlink antenna channel calibration compensation factor B j corresponding to the downlink antenna channel j is set.
  • the downlink antenna channel calibration compensation factor can be set to zero to ensure that the faulty channel's transmit signal is 0, and at the same time, in order to make the faulty downlink antenna channel j not affect the final antenna.
  • the shaping weight of the downlink antenna channel j is adjusted, that is, the uplink antenna channel calibration compensation factor A j corresponding to the number j is set to zero.
  • the reduced channel device of the antenna channel detects that there is a fault in the downlink antenna channel j
  • the first antenna channel in the previous embodiment is the downlink antenna channel j
  • the first antenna channel calibration compensation factor in the previous embodiment is the downlink antenna channel calibration compensation factor B j corresponding to the downlink antenna channel j .
  • the broadcast channel when the downlink antenna channel is a broadcast channel, the broadcast channel includes various control channels. It is more complicated to directly adjust the broadcast weight.
  • the faulty broadcast can be made by setting the downlink antenna channel calibration compensation factor of the faulty downlink channel to zero.
  • the transmission signal of the channel is zero, and the transmission signal of the broadcast channel has zero influence on the power gain of the broadcast coverage, but does not affect the shaping angle. Therefore, in this case, it is only necessary to set the downlink antenna channel calibration compensation factor to 0. can.
  • the specific processing procedure of the broadcast channel is as follows: Assume that the data of the port p is d p , and the data of the antenna ka RX after the port is mapped to the antenna is then:
  • d p is broadcast data
  • Broadcast data for weighted mapping For broadcasting weights, d p is broadcast data, Broadcast data for weighted mapping.
  • the mapped data is further Perform antenna calibration.
  • the compensation factor matrix is calibrated for the downlink antenna channel
  • d IFFT is the calibrated broadcast data.
  • the downlink antenna channel calibration compensation factor corresponding to the certain downlink antenna channel is set to zero.
  • the downlink broadcast antenna channel calibration compensation factor of the faulty antenna channel of the antenna channel has been set to 0, the downlink broadcast antenna channel on the downlink broadcast antenna channel is downlinked.
  • the broadcast data is 0, so that the normal operation of the services of other unfailed downlink broadcast antenna channels is not affected.
  • the first antenna channel in the previous embodiment is the downlink antenna channel j and the uplink antenna channel j.
  • the first antenna channel calibration compensation factor in the previous embodiment is the uplink antenna channel calibration corresponding to the uplink antenna channel j.
  • the compensation factor A j and the downlink antenna channel calibration compensation factor B j corresponding to the downlink antenna channel j .
  • the antenna channel calibration compensation factor B k corresponding to each downlink antenna channel and the antenna channel calibration compensation corresponding to each uplink antenna channel are obtained during the downlink antenna calibration process.
  • the downlink antenna channel calibration compensation factor Bn corresponding to the downlink antenna channel n is set to be unchanged; wherein, n ⁇ 0, 1, 2, 3...K-1 ⁇ .
  • the antenna channel calibration compensation factor B n of the detected downlink antenna channel n that is not faulty is an antenna channel calibration compensation that is acquired when the antenna calibration is not necessary. Factoric. Therefore, when the reduced-order device of the antenna channel detects the downlink antenna channel n that does not have a fault, the reduced-order device of the antenna channel may not change the downlink antenna channel calibration compensation factor B n corresponding to the downlink antenna channel n ; wherein, n ⁇ ⁇ 0, 1, 2, 3... K-1 ⁇ .
  • n is numbered from 0, where n ⁇ ⁇ 0, 1, 2, 3, ..., K-1 ⁇ , and the specific numbering starts, which is not limited in the embodiment of the present invention.
  • S207, S208 and S209 are optional steps after S206, according to the actual In the embodiment of the present invention, after S206, S207 may be performed, S208 may be performed, and S209 may be performed.
  • the specific execution sequence may be determined according to actual conditions. The embodiment is not limited.
  • the antenna channel reduction device adjusts the compensation factor matrix according to the antenna channel, and adjusts the shaping weight of the antenna, so that the shaping weight of the antenna with the antenna channel calibration compensation factor of 0 is 0, and the antenna is reduced.
  • the antenna channel calibration compensation factor matrix includes K antenna channel calibration compensation factors corresponding to the K antennas.
  • the antenna channel reduction device After the antenna channel reduction device sets the antenna channel calibration compensation factor of the faulty antenna channel, the antenna channel reduction device performs antenna compensation on the antenna in the antenna array according to the antenna channel calibration compensation factor matrix, and those skilled in the art may It is understood that since the antenna channel calibration factor corresponding to the faulty antenna channel is 0, the subcarriers on the sounding signals received by the antenna channel using the fault are all 0 (the frequency domain data is all 0), so that after normalization The channel estimation of the faulty antenna corresponds to 0, and the calculated weighting value corresponding to the faulty antenna channel is 0. When all the spatial user data is mapped onto the antenna array by multiplication with the shaped weight matrix, the shaped data is zero on the faulty antenna, so that it does not affect other non-faulty antennas in the antenna array.
  • the antenna channel reduction device detects that the power value of the uplink antenna channel i is abnormal, and the antenna channel calibration compensation factor corresponding to the uplink antenna channel i is 0. Therefore, those skilled in the art can understand that the subcarriers on the detection signal received by using the uplink antenna channel i are all 0, so that the i+1th column in the channel estimation matrix of the normalized uplink antenna i is all 0. Further, the i+1th row in the shape of the weighting matrix of the uplink antenna channel i is all 0.
  • the data of the shaped data on the antenna i is 0, that is, substantially K-1 antennas normally perform service data. Does not affect other K-1 antennas in the antenna array The normal operation of the business data; where i ⁇ ⁇ 0, 1, 2, 3 ... K-1 ⁇ .
  • the i+1th column of the above H matrix is all 0, it can be derived from the matrix operation, and the i+1th row of the matrix W MU (m) is all 0.
  • the data of port p is d p
  • the data of the antenna ka RX after the port is mapped to the antenna is Then the user data shaping process is According to the number of air separation users 2Ni, we know The dimension is [1 ⁇ 2N i ], and the data of all air separation users is mapped to the K and the antenna by matrix multiplication. Since the i+1th row of the matrix W MU (m) is all 0, the final shaped data is 0 on the i+1th antenna.
  • the uplink receiving channel failure also affects the uplink physical uplink shared channel (PUSCH, Physical Uplink Shared Channel) and the physical random access channel (PRACH) and the physical uplink control channel. (PUCCH, Physical Uplink Control Channel) antenna reception of channels. Since the antenna channel's reduced-order device has set the uplink antenna channel calibration compensation factor of the faulty antenna channel to 0, the impact of the faulty uplink antenna channel is minimized.
  • PUSCH Physical Uplink Shared Channel
  • PRACH physical random access channel
  • PUCCH Physical Uplink Control Channel
  • the antenna channel reduction device sets the uplink antenna channel calibration compensation factor, thereby making the uplink The antenna channel receives the frequency domain data as 0, which does not affect the receiving gain of the normal antenna channel.
  • the uplink receiving antenna channel is faulty when performing uplink receiving and demodulating on the uplink receiving antenna channel.
  • the uplink receiving data is 0, so that the normal operation of the services of other unfailed uplink antenna channels is not affected.
  • the channel estimation in the prior art is performed by the sub-antenna, and is not affected.
  • the PUSCH channel performs equalization processing, since the uplink antenna signal is zero, the interference matrix is missing. Can not be reversed, then you can use the small factor matrix compensation method in the prior art to avoid the process that cannot be reversed. Therefore, the step-down device of the antenna channel can set the uplink antenna channel calibration compensation factor to 0 by setting the uplink corresponding channel, which can ensure the downlink shaping performance and the uplink receiving demodulation performance when the base station antenna related processing dimension does not change.
  • the method for reducing the order of the antenna channel detects the antenna channel by performing antenna calibration; and detects the first antenna channel corresponding to the first antenna channel when the faulty first antenna channel is detected.
  • the factor is set to 0; when the second antenna channel without the fault is detected, the second antenna channel calibration compensation factor corresponding to the second antenna channel is set to be unchanged; and the shaping right of the antenna is adjusted according to the antenna channel calibration compensation factor matrix
  • the value is such that the shaping weight on the antenna corresponding to the first antenna channel calibration compensation factor is 0, and the antenna is reduced in order.
  • the antenna channel reduction device corrects the compensation factor matrix according to the antenna channel and performs antenna compensation on the antenna in the antenna array
  • the antenna channel calibration factor corresponding to the faulty antenna channel is 0. Therefore, the subcarriers on the probe signal received by the antenna channel using the fault are all 0 (the frequency domain data is all 0), so that the channel estimation of the normalized fault antenna corresponds to 0, and the calculated The faulty antenna channel corresponds to a weighted value of zero.
  • the data of the shaped data on the faulty antenna is 0, and the reduced-order device of the antenna channel enables the base station antenna to not affect the base station System performance, without changing the antenna matrix dimension, more The effect of antenna channel reduction to eliminate the faulty antenna channel on beamforming is realized in an easy manner, and the normal operation of the service is ensured.
  • the embodiment of the present invention provides a reduced-order device 1 for an antenna channel, and the device 1 may include:
  • the detecting unit 10 is configured to detect the antenna channel when performing antenna calibration.
  • the setting unit 11 is configured to set the first antenna channel calibration compensation factor corresponding to the first antenna channel to 0 when the detecting unit 10 detects that there is a faulty first antenna channel.
  • the setting unit 11 is further configured to set the second antenna channel calibration compensation factor corresponding to the second antenna channel to be unchanged when the detecting unit 10 detects the second antenna channel that does not have a fault.
  • the adjusting unit 12 is configured to adjust the shaping weight of the antenna according to the antenna channel calibration compensation factor matrix set by the setting unit 11 so as to correspond to the first antenna channel calibration compensation factor set by the setting unit 11
  • the antenna channel calibration compensation factor matrix includes the first antenna channel calibration compensation factor and the second antenna channel set by the setting unit 11 Calibrate the compensation factor.
  • the antenna calibration includes an uplink antenna channel calibration and a downlink antenna channel calibration.
  • the detecting unit 10 is configured to detect the uplink antenna channel when performing the uplink antenna calibration, and detect the downlink antenna channel when performing the downlink antenna calibration.
  • the apparatus 1 further includes: an obtaining unit 13.
  • the first antenna channel detected by the detecting unit 10 is an uplink antenna channel i
  • the first antenna channel calibration compensation factor acquired by the acquiring unit 13 is an uplink antenna corresponding to the uplink antenna channel i.
  • the channel calibration compensation factor A i where i ⁇ ⁇ 0, 1, 2, 3, ... K-1 ⁇ .
  • the first antenna channel detected by the detecting unit 10 is a downlink antenna channel j, or the first antenna channel detected by the detecting unit 10 is a downlink antenna channel j and an uplink antenna channel j.
  • the first antenna channel calibration compensation factor acquired by the acquiring unit 13 is an uplink antenna channel calibration compensation factor A j corresponding to the uplink antenna channel j and a downlink antenna channel calibration compensation factor B j corresponding to the downlink antenna channel j. , where j ⁇ 0, 1, 2, 3...K-1 ⁇ .
  • the first antenna channel detected by the detecting unit 10 is a downlink antenna channel j
  • the first antenna channel calibration compensation factor acquired by the acquiring unit 13 is a downlink antenna corresponding to the downlink antenna channel j.
  • the channel calibration compensation factor B j where j ⁇ ⁇ 0, 1, 2, 3, ... K-1 ⁇ .
  • the detecting unit 10, the setting unit 11, the adjusting unit 12, and the obtaining unit 13 in the embodiment of the present invention may all be performed by a processor.
  • the processor may be a central processing unit, or a specific integrated circuit, or one or more integrated circuits configured to implement the present invention.
  • the antenna degrading device in the embodiment of the present invention may be a separate device, or may be a combination of some modules in the beamforming and antenna calibration process of the existing antenna, and the specific implementation manner is not implemented in the embodiment of the present invention. limit.
  • the antenna price reduction device detects the antenna channel by performing antenna calibration; and when detecting the first antenna channel with the fault, sets the first antenna channel calibration compensation factor corresponding to the first antenna channel to 0; when detecting the second antenna channel without the fault, setting the second antenna channel calibration compensation factor corresponding to the second antenna channel to be unchanged; adjusting the compensation weight matrix according to the antenna channel calibration, adjusting the shaping weight of the antenna, so that The shaping weight on the antenna corresponding to the first antenna channel calibration compensation factor is 0, and the antenna is reduced in order.
  • the antenna channel reduction device corrects the compensation factor matrix according to the antenna channel and performs antenna compensation on the antenna in the antenna array
  • the antenna channel calibration factor corresponding to the faulty antenna channel is 0. Therefore, the subcarriers on the probe signal received by the antenna channel using the fault are all 0 (the frequency domain data is all 0), so that the channel estimation of the normalized fault antenna corresponds to 0, and the calculated The faulty antenna channel corresponds to a weighted value of zero.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention can take the form of a hardware embodiment, a software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.
  • the present invention is directed to a method, apparatus (system), and computer program in accordance with an embodiment of the present invention
  • the flow chart and/or block diagram of the product is described. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG.
  • These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.
  • the antenna channel reduction device corrects the compensation factor matrix according to the antenna channel and performs antenna compensation on the antenna in the antenna array
  • the antenna channel calibration factor corresponding to the faulty antenna channel is 0. Therefore, the subcarriers on the probe signal received by the antenna channel using the fault are all 0 (the frequency domain data is all 0), so that the channel estimation of the normalized fault antenna corresponds to 0, and the calculated The faulty antenna channel corresponds to a weighted value of zero.
  • the data of the shaped data on the faulty antenna is 0, so that the base station antenna can not affect the performance of the base station system and does not change. Based on the dimension of the antenna matrix, it is easier to reduce the influence of the antenna channel reduction to eliminate the faulty antenna channel on the beamforming, and ensure the normal operation of the service.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
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  • Electromagnetism (AREA)
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Abstract

Un mode de réalisation de la présente invention concerne un procédé de réduction d'ordre pour un canal d'antenne. Le procédé consiste à : pendant l'étalonnage d'antenne, effectuer une détection sur un canal d'antenne; si un premier canal d'antenne ayant un défaut est détecté, régler un premier facteur de compensation d'étalonnage de canal d'antenne correspondant au premier canal d'antenne comme étant 0; si un second canal d'antenne n'ayant aucun défaut n'est détecté, régler un second facteur de compensation d'étalonnage de canal d'antenne correspondant au second canal d'antenne comme étant inchangé; et ajuster une pondération de formation de l'antenne en fonction d'une matrice de facteurs de compensation d'étalonnage de canal d'antenne de sorte que la pondération de formation d'antenne correspondant au premier facteur de compensation d'étalonnage de canal d'antenne soit de 0 afin de réaliser une réduction d'ordre d'antenne. L'invention concerne également, dans le mode de réalisation, un dispositif de réduction d'ordre pour un canal d'antenne.
PCT/CN2015/088121 2015-05-19 2015-08-26 Procédé et dispositif pour réduction d'ordre canal d'antenne WO2016183957A1 (fr)

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WO2020135227A1 (fr) * 2018-12-29 2020-07-02 中兴通讯股份有限公司 Procédé de formation de faisceau, station de base, et support de données lisible par ordinateur
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