WO2016183957A1 - Order reducing method and device for antenna channel - Google Patents

Abstract

Disclosed in an embodiment of the present invention is an order reducing method for an antenna channel. The method comprises: during antenna calibration, performing detection on an antenna channel; if a first antenna channel having a fault is detected, setting a first antenna channel calibration compensation factor corresponding to the first antenna channel as 0; if a second antenna channel having no fault is detected, setting a second antenna channel calibration compensation factor corresponding to the second antenna channel to be unvaried; and adjusting a forming weight of the antenna according to an antenna channel calibration compensation factor matrix, such that the forming weight of the antenna corresponding to the first antenna channel calibration compensation factor is 0 to realize antenna order reduction. Also disclosed in the embodiment of the present invention is an order reducing device for an antenna channel.

Description

Method and device for reducing the order of antenna channel Technical field

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.

Background technique

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. In the Time Division Long Term Evolution (TD-LTE) system, in order to reduce the co-channel interference between terminals and increase the throughput and coverage of the cell edge users, 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.

In the prior art, the baseband processing unit (BBU) of the base station performs the processing of the baseband signal, and 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. For example, in the existing macro 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.

However, in the prior art, 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. Meanwhile, in a large-scale antenna array, even In a thousand antenna arrays, when an individual antenna channel failure occurs, 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. For all antenna arrays of the following matrix dimensions, such as 64 antenna arrays, the base station needs to support antenna arrays of 1, 2, 3, ... 64 dimensions, which is unbearable and achievable for the base station.

Summary of the invention

In order to solve the above technical problem, 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 technical solution of the present invention is implemented as follows:

The embodiment of the invention provides a method for reducing the order of an antenna channel, and the method includes:

When performing antenna calibration, the antenna channel is detected;

When the first antenna channel with the fault is detected, the first antenna channel calibration compensation factor corresponding to the first antenna channel is set to 0;

When detecting the second antenna channel that does not have a fault, setting a second antenna channel calibration compensation factor corresponding to the second antenna channel to be unchanged;

Adjusting the weighting value of the antenna according to the antenna channel calibration compensation factor matrix, so that the shaping weight on the antenna corresponding to the first antenna channel calibration compensation factor is 0, and the antenna is reduced; wherein the antenna channel The calibration compensation factor matrix includes the first antenna channel calibration compensation factor and the second antenna channel calibration compensation factor.

In the above solution, the antenna calibration includes uplink antenna channel calibration and downlink antenna channel calibration;

When the antenna is calibrated, the antenna channel is detected, including:

When performing the uplink antenna calibration, detecting the uplink antenna channel, and performing the downlink antenna calibration, detecting the downlink antenna channel;

Correspondingly, before the detecting the uplink antenna channel, the method further includes:

Obtaining an uplink antenna channel calibration compensation factor A _k ; wherein k=1, 2, 3, ..., K, K is the maximum number of uplink antennas in the antenna array;

Before the detecting the downlink antenna channel, the method further includes:

Obtaining a downlink antenna channel calibration compensation factor _Bk ; where k=1, 2, 3, ..., K, K is the maximum number of downlink antennas in the antenna array.

In the above solution, the first antenna channel is an uplink antenna channel i, and 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};

Correspondingly, when the first antenna channel with the fault is detected, the first antenna channel calibration compensation factor corresponding to the first antenna channel is set to 0, including:

When it is detected that there is a fault in the uplink antenna channel i, the uplink antenna channel calibration compensation factor A _i =0 is set.

In the above solution, 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};

Correspondingly, when the first antenna channel with the fault is detected, the first antenna channel calibration compensation factor corresponding to the first antenna channel is set to 0, including:

When detecting that there is a fault in the downlink antenna channel j, setting the uplink antenna channel calibration compensation factor A _j =0 and the downlink antenna channel calibration compensation factor B _j =0.

In the above solution, the first antenna channel is a downlink antenna channel j, and 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};

Correspondingly, when the first antenna channel with the fault is detected, the first antenna channel calibration compensation factor corresponding to the first antenna channel is set to 0, including:

When it is detected that there is a fault in the downlink antenna channel j, 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.

In the above solution, the antenna calibration includes uplink antenna channel calibration and downlink antenna channel calibration;

The detecting unit 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;

Correspondingly, the device further includes: an acquiring unit;

The acquiring unit is configured to obtain an uplink antenna channel calibration compensation factor A _k before the detecting unit detects the uplink antenna channel; where k=1, 2, 3, ..., K, K is the maximum uplink in the antenna array And determining, by the detecting unit, the downlink antenna channel calibration compensation factor B _k before detecting the downlink antenna channel; wherein k=1, 2, 3, ..., K, K is the maximum number of downlink antennas in the antenna array .

In the above solution, the first antenna channel detected by the detecting unit is an uplink antenna channel i, and 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 setting unit is configured to set the uplink antenna channel calibration compensation factor A _i =0 obtained by the acquiring unit when the detecting unit detects that the uplink antenna channel i has a fault.

In the above solution, 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 setting unit is configured to: when the detecting unit detects that the downlink antenna channel j is faulty, set the uplink antenna channel calibration compensation factor A _j =0 obtained by the acquiring unit, and set the acquiring unit to acquire The downlink antenna channel calibration compensation factor B _j =0.

In the above solution, the first antenna channel detected by the detecting unit is a downlink antenna channel j, and 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 setting unit is configured to set the downlink antenna channel calibration compensation factor B _j =0 obtained by the acquiring unit when the detecting unit detects that the downlink antenna channel j is faulty.

Here, 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. A processor (DSP, Digital Singnal Processor) or a programmable logic array (FPGA).

The embodiment of the invention provides a method and a device for reducing the antenna channel. When the antenna is calibrated, the antenna channel is detected. When the first antenna channel with the fault is detected, the first antenna corresponding to the first antenna channel is used. The channel calibration compensation 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; according to the antenna channel calibration compensation factor matrix, the antenna is adjusted The shaping weight 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. With the above technical implementation, since 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, those skilled in the art can understand that 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. When all 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.

DRAWINGS

1 is a structural block diagram of an implementation of an embodiment of the present invention;

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;

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.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings.

The new generation of broadband wireless mobile communication systems is based on Orthogonal Frequency Division Multiplexing (OFDM) and multi-antenna technology, and comprehensively optimizes packets for data transmission in mobile communication air interface technology. OFDM has frequency selectivity, which solves the problem of multipath channel and greatly improves the frequency band utilization. In multi-antenna technology, multiple input multiple output (MIMO) technology utilizes spatial freedom separation provided by multiple antennas. user. Different users can occupy the same time-frequency resources, so that signals can suppress interference between multiple users through signal processing algorithms, and improve cell throughput by means of time-frequency resource multiplexing. In smart antennas, 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.

Specifically, 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. For the asymmetry of the uplink and downlink of the RF channel before shaping, 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. In order to ensure the high quality of the beamforming, each antenna channel should be calibrated. The conventional calibration is time domain calibration by the RRU. In the embodiment of the present invention, 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. As shown in FIG. 1 , 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.

It should be noted that 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.

Embodiment 1

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:

S101: When performing antenna calibration, detecting an antenna channel.

In this step, antenna calibration is performed by a reduced-order device of the antenna channel.

It should be noted that 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. However, in actual operation, the BBU can assist the BBU to complete the fault detection and judgment of the antenna channel. In the embodiment of the present invention, 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.

In particular, embodiments of the present invention are applicable to any situation where antenna calibration can be performed and the smart antenna utilizes beamforming techniques.

It should be noted that 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.

Specifically, in the embodiment of the present invention, 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.

In an embodiment of the present invention, 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.

Specifically, on the one hand, the uplink receiving service data is 0 on the faulty uplink antenna channel, and 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. On the other hand, 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.

S102. When detecting the faulty first antenna channel, set a first antenna channel calibration compensation factor corresponding to the first antenna channel to 0.

Specifically, after the antenna channel is detected by the reduced-order device of the 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 When an antenna channel is used, the first antenna channel calibration compensation factor corresponding to the first antenna channel may be set to zero.

It should be noted that the antenna channel calibration compensation factor of each antenna in the antenna array constitutes an antenna channel calibration compensation factor matrix. During antenna calibration, 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.

It can be understood that, when there is an antenna failure in the antenna array, in order to prevent the fault antenna from affecting the beamforming of other antennas, 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.

Exemplarily, if the antenna array has K uplink antenna channels, K≥1, 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. In the embodiment of the present invention, 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.

S103. When detecting 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.

Specifically, after the antenna channel reduction device detects the antenna channel, 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.

It should be noted that 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.

S104. Adjust the compensation factor matrix according to the antenna channel, and adjust 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. The antenna channel is calibrated. The compensation factor matrix includes the first antenna channel calibration compensation factor and the second antenna channel calibration compensation factor.

Specifically, the antenna channel reduction device performs antenna compensation on the antenna in the antenna array according to the antenna channel calibration compensation factor matrix. It can be understood by those skilled in the art that since 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. When passed When 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.

Exemplarily, if the antenna array has K uplink antenna channels, K≥1, 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. When the data of all the air-divided users is mapped to the K antennas by multiplication with the weighted weight matrix, 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}.

It should be noted that the 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 provided by the embodiment of the present invention 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. With the above technical implementation, since 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, those skilled in the art can understand that 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. When all 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.

Embodiment 2

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:

S201. The antenna channel reduction device obtains an uplink antenna channel calibration compensation factor A _k when performing uplink antenna calibration; wherein k=1, 2, 3, ..., K, K is the maximum number of uplink antennas in the antenna array.

It should be noted that 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. However, in actual operation, the BBU can assist the BBU to complete the fault detection and judgment of the antenna channel. In the embodiment of the present invention, 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.

It should be noted that the uplink antenna channel is a receiving channel and can receive signals.

In particular, embodiments of the present invention are applicable to any situation where antenna calibration can be performed and the smart antenna utilizes beamforming techniques.

It should be noted that 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.

Specifically, when the antenna channel reduction device performs uplink antenna calibration, the uplink antenna channel calibration compensation factor A _k corresponding to the uplink antenna is respectively obtained by using an existing calculation manner; wherein k=1, 2, 3, . . . , K is the maximum number of uplink antennas in the antenna array.

It should be noted that 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.

S202. The reduced channel device of the antenna channel detects the uplink antenna channel.

When the antenna channel reduction device performs uplink antenna calibration, after obtaining the uplink antenna channel calibration compensation factor A _k , k=1, 2, 3, ..., K, K is the maximum uplink antenna number in the antenna array. It can be seen that the uplink antenna in the antenna array in the embodiment of the present invention has K roots. Therefore, the reduced channel device of the antenna channel detects the K uplink antenna channels corresponding to the K uplink antennas.

In the embodiment of the present invention, 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.

S203: The antenna channel reduction device detects that there is a fault in the uplink antenna channel i, and sets an uplink antenna channel calibration compensation factor A _i =0; wherein, i ∈ {0, 1, 2, 3, ..., K-1}.

Specifically, after the uplink channel is detected by the reduced channel device of the antenna channel, 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. When the faulty uplink antenna channel i is present, in order to make the faulty uplink antenna channel i not affect the final shaping angle of the antenna, 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}.

It should be noted that the antenna channel calibration compensation factor of each antenna in the antenna array constitutes an antenna channel calibration compensation factor matrix. During the antenna calibration process, 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.

In the embodiment of the present invention, the first antenna channel in the previous embodiment is the uplink antenna channel i, and 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 .

It can be understood that, when there is an antenna failure in the antenna array, in order to prevent the fault antenna from affecting the beamforming of other antennas, 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.

In an embodiment of the present invention, 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.

Exemplarily, if the antenna array has K uplink antenna channels, K≥1, 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.

S204: When the reduced-order device of the antenna channel detects the uplink antenna channel t that does not have a fault, 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}.

Specifically, after the downlink channel of the antenna channel is detected, 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}.

In the embodiment of the present invention, 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.

It should be noted that 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.

S205. The downlink channel calibration device of the antenna channel obtains a downlink antenna channel calibration compensation factor _Bk ; wherein k=1, 2, 3, ..., K, K is the maximum number of downlink antennas in the antenna array.

It should be noted that 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.

Specifically, when the downlink channel of the antenna channel performs the downlink antenna calibration, the downlink antenna channel calibration compensation factor B _k corresponding to the downlink antenna is respectively obtained by using an existing calculation manner; wherein k=1, 2, 3, . . . , K is the maximum number of downlink antennas in the antenna array.

In the embodiment of the present invention, the downlink antenna channel is a transmission channel, and the signal can be transmitted.

It should be noted that 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.

S206. The reduced channel device of the antenna channel detects the downlink antenna channel.

When the downlink channel calibration of the antenna channel is performed for downlink antenna calibration, after obtaining the downlink antenna channel calibration compensation factor B _k , k=1, 2, 3, ..., K, K is the maximum downlink antenna number in the antenna array, and the antenna channel calibration compensation factor is It can be seen that there are K roots in the downlink antenna in the antenna array in the embodiment of the present invention. Therefore, the reduced-order device of the antenna channel detects the K downlink antenna channels corresponding to the K downlink antennas.

In the embodiment of the present invention, 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.

S207. The antenna channel reduction device detects that the downlink antenna channel j has a fault, and sets an uplink antenna channel calibration compensation factor A _j =0 and a downlink antenna channel calibration compensation factor B _j =0; wherein, j∈{0, 1, 2, 3...K-1}.

In the embodiment of the present invention, the first antenna channel in the previous embodiment is the downlink antenna channel j, and 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 .

Specifically, after the downlink channel of the antenna channel is detected, 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. When the faulty downlink antenna channel j is present, 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.} Set to 0; where j∈{0, 1, 2, 3...K-1}.

It should be noted that when the downlink antenna channel j is faulty, 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. At the shaping angle, 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.

Further, when the reduced channel device of the antenna channel detects that there is a fault in the downlink antenna channel j, only the downlink antenna channel calibration compensation factor B _j =0 may be set.

At this time, the first antenna channel in the previous embodiment is the downlink antenna channel j, and 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 .

For example, 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. In this case, 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:

among them,

For broadcasting weights, d ^p is broadcast data,

Broadcast data for weighted mapping.

According to formula (2), the mapped data is further

Perform antenna calibration.

among them,

The compensation factor matrix is calibrated for the downlink antenna channel, and d _IFFT is the calibrated broadcast data. When a certain downlink antenna channel of the broadcast fails,

The downlink antenna channel calibration compensation factor corresponding to the certain downlink antenna channel is set to zero.

It can be understood that, since 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.

S208. When the downlink device of the antenna channel detects that there is a fault in the downlink antenna channel j and the uplink antenna channel j, set a downlink antenna channel calibration compensation factor B _j =0 and an uplink antenna channel calibration compensation factor A _j =0; wherein, j∈ {0, 1, 2, 3... K-1}.

In the embodiment of the present invention, 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 . Specifically, after the downlink channel is detected by the reduced channel device of the antenna channel, 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 factor A _k , when the reduced channel device of the antenna channel detects the faulty downlink antenna channel j and the uplink antenna channel j, the downlink antenna channel calibration compensation factor B _j corresponding to the downlink antenna channel _{j can be} set to 0. And an uplink antenna channel calibration compensation factor A _j =0 corresponding to the uplink antenna channel _j ; wherein j ∈ {0, 1, 2, 3, ..., K-1}.

S209. When the downlink device of the antenna channel detects the downlink antenna channel n that does not have a fault, 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}.

Specifically, after the downlink channel of the antenna channel is detected, 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}.

In the embodiment of the present invention, 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.

It should be noted that 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.

S210, 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.

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 shaping angle and normal operation of the downlink service data; wherein the antenna channel calibration compensation factor matrix includes K antenna channel calibration compensation factors corresponding to the K antennas.

Exemplarily, if the antenna array has K uplink antenna channels, K≥1, 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. When the data of all the air-divided users is mapped to the K antennas by multiplication with the weighted weight matrix, 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}.

It should be noted that, for the user service shaping data, by setting the uplink antenna channel failure in the above description, setting the uplink antenna channel calibration compensation factor of the corresponding antenna channel to 0, the adjustment of the shaping weight has been achieved.

Specifically, in the antenna calibration process of the array of 64 antennas, after the received signal of the uplink antenna is subjected to Fourier transform, the subcarriers of the extracted 1200 detection signals are yf(k, ka _RX , l), where k is The subcarrier index, ka _RX , is the receiving antenna index, l is the symbol index, and W _{up_AC} is the antenna channel calibration compensation factor matrix composed of K antenna channel calibration compensation factors, where ka _RX =0, 1, ... , K, a total of K receiving antennas, after the antenna calibration compensation signal f _srs (k, ka _RX , l) is:

f _srs (k,ka _RX ,l)=yf(k,ka _RX ,l).W _{up_AC} (k,ka _RX ) (3)

Set the antenna channel calibration compensation factor corresponding to the ka _RX antenna to 0, so that the subcarriers on the detection signal received by the faulty antenna channel are all zero, and further assume that the normalized channel estimation value is h _srs (ka _Rx , m, Ni, q), where ka _RX is the receiving antenna index, m is the RB index, Ni is the space division user index, and q is the single-user stream number index, then when calculating the weighting value, first construct An overall channel matrix is formed, that is, each RB constructs an H(m), m=1, . . . , 100. Assume that the number of streams per user is two streams, and H(m) is as follows.

The dimension of this matrix H(m) is 2Ni×K, and the horizontal direction is 64 antennas arranged in order, and the antennas 1 and 2 in which the vertical direction is Ni users are sequentially arranged. Since the subcarriers on the detection signal received by the faulty antenna channel are set to 0, the channel estimation H of the corresponding antenna channel obtained according to the linear operation is also 0, and if the faulty antenna channel is i (numbered from 0), then H ( m) The i+1th column of the matrix is all 0, then calculate the space division weight matrix W _MU (m), the matrix dimension is [K × 2N _i ], W _MU (m) = H ^H (m) ( H(m).H ^H (m)) ^-1 , m = 1, ..., 100. Since 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. Suppose the data of port p is d ^p , and 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.

It should be noted that 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.

Specifically, for the PRACH and PUCCH channels, because the sub-antenna performs the operation in the uplink demodulation process in the prior art, and then performs equal gain combining, 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.

It can be understood that, since the downlink channel of the antenna channel has set the uplink receiving antenna channel calibration compensation factor of the faulty antenna channel to 0, 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.

It should be noted that, for the PUSCH channel, the channel estimation in the prior art is performed by the sub-antenna, and is not affected. However, when 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 provided by the embodiment of the present invention 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. With the above technical implementation, since 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, those skilled in the art can understand that 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. When data of all air-divided users is mapped onto the antenna array by multiplication with the shaped weight matrix, 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.

Embodiment 3

As shown in FIG. 4, 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.

Optionally, 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.

Optionally, as shown in FIG. 5, the apparatus 1 further includes: an obtaining unit 13.

The acquiring unit 13 is configured to obtain an uplink antenna channel calibration compensation factor A _k before the detecting unit 10 detects the uplink antenna channel; where k=1, 2, 3, ..., K, K is in the antenna array The maximum number of uplink antennas; and the detection unit 10 acquires a downlink antenna channel calibration compensation factor B _k before detecting the downlink antenna channel; wherein k=1, 2, 3, ..., K, K is the largest in the antenna array Number of downlink antennas.

Optionally, the first antenna channel detected by the detecting unit 10 is an uplink antenna channel i, and 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 setting unit 11 is configured to set the uplink antenna channel calibration compensation factor A _i =0 obtained by the acquiring unit 13 when the detecting unit 10 detects that the uplink antenna channel i has a fault.

Optionally, 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 setting unit 11 is configured to set the uplink antenna channel calibration compensation factor A _j =0 obtained by the acquiring unit 13 when the detecting unit 10 detects that the downlink antenna channel j is faulty, and set the The downlink antenna channel calibration compensation factor B _j =0 obtained by the obtaining unit 13 .

Optionally, the first antenna channel detected by the detecting unit 10 is a downlink antenna channel j, and 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 setting unit 11 is configured to set the downlink antenna channel calibration compensation factor B _j =0 obtained by the acquiring unit 13 when the detecting unit 10 detects that the downlink antenna channel j is faulty.

It should be noted that 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 provided by the embodiment of the present invention 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. With the above technical implementation, since 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, those skilled in the art can understand that 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. When data of all air-divided users is mapped onto the antenna array by multiplication with the shaped weight matrix, 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 Based on the system performance and without changing the dimension of the antenna matrix, it is easier to realize the effect of the antenna channel reduction to eliminate the faulty antenna channel on the beamforming, and ensure the normal operation of the service.

Those skilled in the art will appreciate that 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. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

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 above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Industrial applicability

The embodiment of the invention provides a method and a device for reducing the antenna channel. When the antenna is calibrated, the antenna channel is detected. When the first antenna channel with the fault is detected, the first antenna corresponding to the first antenna channel is used. The channel calibration compensation 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; according to the antenna channel calibration compensation factor matrix, the antenna is adjusted The weighting 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 lowered. Order. With the above technical implementation, since 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, those skilled in the art can understand that 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. When all 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.

Claims (10)

1. A method for reducing the order of an antenna channel, the method comprising:

   When performing antenna calibration, the antenna channel is detected;

   When the first antenna channel with the fault is detected, the first antenna channel calibration compensation factor corresponding to the first antenna channel is set to 0;

   When detecting the second antenna channel that does not have a fault, setting a second antenna channel calibration compensation factor corresponding to the second antenna channel to be unchanged;

   Adjusting the weighting value of the antenna according to the antenna channel calibration compensation factor matrix, so that the shaping weight on the antenna corresponding to the first antenna channel calibration compensation factor is 0, and the antenna is reduced; wherein the antenna channel The calibration compensation factor matrix includes the first antenna channel calibration compensation factor and the second antenna channel calibration compensation factor.
2. The method for reducing the order of an antenna channel according to claim 1, wherein the antenna calibration comprises an uplink antenna channel calibration and a downlink antenna channel calibration;

   When the antenna is calibrated, the antenna channel is detected, including:

   When performing the uplink antenna calibration, detecting the uplink antenna channel, and performing the downlink antenna calibration, detecting the downlink antenna channel;

   Correspondingly, before the detecting the uplink antenna channel, the method further includes:

   Obtaining an uplink antenna channel calibration compensation factor A _k ; wherein k=1, 2, 3, ..., K, K is the maximum number of uplink antennas in the antenna array;

   Before the detecting the downlink antenna channel, the method further includes:

   Obtaining a downlink antenna channel calibration compensation factor _Bk ; where k=1, 2, 3, ..., K, K is the maximum number of downlink antennas in the antenna array.
3. The method for reducing the order of an antenna channel according to claim 2, wherein the first antenna channel is an uplink antenna channel i, and the first antenna channel calibration compensation factor is an uplink antenna channel calibration corresponding to the uplink antenna channel i Compensation factor A _i , where i ∈ {0, 1, 2, 3, ... K-1};

   Correspondingly, when the first antenna channel with the fault is detected, the first antenna channel calibration compensation factor corresponding to the first antenna channel is set to 0, including:

   When it is detected that there is a fault in the uplink antenna channel i, the uplink antenna channel calibration compensation factor A _i =0 is set.
4. The method of reducing the order of the antenna channel according to claim 2, wherein 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};

   Correspondingly, when the first antenna channel with the fault is detected, the first antenna channel calibration compensation factor corresponding to the first antenna channel is set to 0, including:

   When detecting that there is a fault in the downlink antenna channel j, setting the uplink antenna channel calibration compensation factor A _j =0 and the downlink antenna channel calibration compensation factor B _j =0.
5. The method for reducing the order of the antenna channel according to claim 2, wherein the first antenna channel is a downlink antenna channel j, and the first antenna channel calibration compensation factor is a downlink antenna channel calibration corresponding to the downlink antenna channel j Compensation factor B _j , where j ∈ {0, 1, 2, 3, ... K-1};

   Correspondingly, when the first antenna channel with the fault is detected, the first antenna channel calibration compensation factor corresponding to the first antenna channel is set to 0, including:

   When it is detected that there is a fault in the downlink antenna channel j, the downlink antenna channel calibration compensation factor B _j =0 is set.
6. A reduced-order device for an antenna channel, the device comprising:

   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.
7. The reduced-order device for an antenna channel according to claim 6, wherein the antenna calibration comprises an uplink antenna channel calibration and a downlink antenna channel calibration;

   The detecting unit 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;

   Correspondingly, the device further includes: an acquiring unit;

   The acquiring unit is configured to obtain an uplink antenna channel calibration compensation factor A _k before the detecting unit detects the uplink antenna channel; where k=1, 2, 3, ..., K, K is the maximum uplink in the antenna array. And determining, by the detecting unit, the downlink antenna channel calibration compensation factor B _k before detecting the downlink antenna channel; wherein k=1, 2, 3, ..., K, K is the maximum number of downlink antennas in the antenna array .
8. The apparatus for reducing the size of the antenna channel according to claim 7, wherein the first antenna channel detected by the detecting unit is an uplink antenna channel i, and the first antenna channel calibration compensation factor acquired by the acquiring unit is The uplink antenna channel corresponding to the uplink antenna channel i is calibrated by a compensation factor A _i , where i ∈ {0, 1, 2, 3, ..., K-1};

   The setting unit is configured to set the uplink antenna channel calibration compensation factor A _i =0 obtained by the acquiring unit when the detecting unit detects that the uplink antenna channel i has a fault.
9. The apparatus for reducing the size of an antenna channel according to claim 7, wherein said detecting unit The detected first antenna channel 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 setting unit is configured to: when the detecting unit detects that the downlink antenna channel j is faulty, set the uplink antenna channel calibration compensation factor A _j =0 obtained by the acquiring unit, and set the acquiring unit to acquire The downlink antenna channel calibration compensation factor B _j =0.
10. The apparatus for reducing the size of the antenna channel according to claim 7, wherein the first antenna channel detected by the detecting unit is a downlink antenna channel j, and the first antenna channel calibration compensation factor acquired by the acquiring unit 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 setting unit is configured to set the downlink antenna channel calibration compensation factor B _j =0 obtained by the acquiring unit when the detecting unit detects that the downlink antenna channel j is faulty.

Images