CN106301508B - Order reduction method and device for antenna channel - Google Patents

Order reduction method and device for antenna channel Download PDF

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Publication number
CN106301508B
CN106301508B CN201510256342.4A CN201510256342A CN106301508B CN 106301508 B CN106301508 B CN 106301508B CN 201510256342 A CN201510256342 A CN 201510256342A CN 106301508 B CN106301508 B CN 106301508B
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antenna channel
antenna
channel
compensation factor
uplink
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CN106301508A (en
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张玉杰
宋连坡
李刚
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ZTE Corp
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ZTE Corp
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    • 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
    • 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
    • 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

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

Abstract

The embodiment of the invention discloses an order reduction method of an antenna channel, which comprises the following steps: when the antenna is calibrated, detecting an antenna channel; when a first antenna channel with a fault is detected, setting a first antenna channel calibration compensation factor corresponding to the first antenna channel to be 0; when a second antenna channel without faults is detected, setting a second antenna channel calibration compensation factor corresponding to the second antenna channel to be unchanged; and adjusting the forming weight of the antenna according to the antenna channel calibration compensation factor matrix to enable the forming weight on the antenna corresponding to the first antenna channel calibration compensation factor to be 0, thereby realizing the order reduction of the antenna. The embodiment of the invention also discloses an order reducing device of the antenna channel.

Description

Order reduction method and device for antenna channel
Technical Field
The present invention relates to antenna channel management technologies in wireless communications, and in particular, to an antenna channel order reduction method and apparatus.
Background
Smart antenna technology, which is a space division technology, has become the most attractive technology following frequency division multiplexing, time division multiplexing, and code division multiplexing. In a Time Division Long Term Evolution (TD-LTE) system, in order to reduce co-channel interference between terminals and increase throughput and coverage of cell edge users, a multi-antenna beam forming technology with small array element spacing is introduced at a base station side. In order to ensure the correctness and reliability of beam forming, antenna calibration of the smart antenna becomes a key application technology. Specifically, the base station can reduce the amplitude and phase errors of each channel of the antenna array through the calibration of the smart antenna, so as to ensure the accuracy and reliability of beam forming.
In the prior art, a Base Band Unit (BBU) of a Base station completes processing of a Base band signal, a Radio Remote Unit (RRU) of the Base station realizes Radio frequency processing and signal amplification functions, and the RRU and the BBU are connected by an optical fiber. When individual antenna channel is in fault, the preset antenna channel number step-down processing mode is adopted to block the antenna channel with fault, so that the antenna channel with fault exits from operation (namely, is eliminated from the antenna array), the order of the antenna array is reduced, the antenna channel with fault is closed, the beam forming is reduced, and the normal operation of service is ensured. For example: in an existing macro base station 8 antenna array, when a base station detects that a certain antenna channel has a fault, the base station directly drops to a 4 antenna array to close the antenna channel with the fault; when some antennas in the 4-antenna array fail, the system is lowered to the 2-antenna array again to close the failed antenna channel.
However, when the step reduction is performed on the antenna channels by adopting the processing manner of the step-over decreasing of the number of antenna channels in the prior art, the step-over decreasing of the number of antenna channels may cause the performance of the system to be reduced; meanwhile, in a large-scale antenna array, even thousands of antenna arrays, when individual antenna channel faults occur, the base station supports the antenna arrays with various matrix dimensions in a crossing manner by using the conventional antenna order reduction technology, and the price reduction cost is high; alternatively, the base station needs to support antenna arrays with all matrix dimensions below the maximum number of antennas, for example, 64 antenna arrays, and the base station needs to support antenna arrays with 1, 2, 3 … … 64 dimensions, which is difficult for the base station to withstand and implement.
Disclosure of Invention
In order to solve the above technical problems, embodiments of the present invention are expected to provide a method and an apparatus for reducing the order of an antenna channel, which can easily implement the order reduction of the antenna channel to eliminate the influence of a faulty antenna channel on beam forming and ensure the normal operation of a service on the basis of not affecting the system performance of a base station and not changing the dimension of an antenna matrix.
The technical scheme of the invention is realized as follows:
the embodiment of the invention provides an order reduction method of an antenna channel, which comprises the following steps:
when the antenna is calibrated, detecting an antenna channel;
when a first antenna channel with a fault is detected, setting a first antenna channel calibration compensation factor corresponding to the first antenna channel to be 0;
when a second antenna channel without faults is detected, setting a second antenna channel calibration compensation factor corresponding to the second antenna channel to be unchanged;
adjusting the forming weight of the antenna according to the antenna channel calibration compensation factor matrix to enable the forming weight on the antenna corresponding to the first antenna channel calibration compensation factor to be 0, and realizing antenna order reduction; wherein the antenna channel calibration compensation factor matrix includes the first antenna channel calibration compensation factor and the second antenna channel calibration compensation factor.
In the above scheme, the antenna calibration includes uplink antenna channel calibration and downlink antenna channel calibration;
when carrying out antenna calibration, detect the antenna channel, include:
detecting an uplink antenna channel when the uplink antenna is calibrated, and detecting a downlink antenna channel when the downlink antenna is calibrated;
correspondingly, before the detecting the uplink antenna channel, the method further includes:
obtaining the calibration compensation factor A of the uplink antenna channelk(ii) a K is 1, 2, 3 … … K, where 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 calibration compensation factor B of a downlink antenna channelk(ii) a And K is 1, 2 and 3 … … K, and K is the maximum number of downlink antennas in the antenna array.
In the above scheme, the first antenna channel is an uplink antenna channel i, and the first antenna is a downlink antenna channel iThe line channel calibration compensation factor is an uplink antenna channel calibration compensation factor A corresponding to the uplink antenna channel iiWherein, i ∈ {1, 2, 3 … … K };
correspondingly, when the first antenna channel with the fault is detected, setting the first antenna channel calibration compensation factor corresponding to the first antenna channel to 0 includes:
when the uplink antenna channel i is detected to have faults, setting the calibration compensation factor A of the uplink antenna channeli＝0。
In the above scheme, 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 corresponding to the uplink antenna channel jjA downlink antenna channel calibration compensation factor B corresponding to the downlink antenna channel jjWherein, j ∈ {1, 2, 3 … … K };
correspondingly, when the first antenna channel with the fault is detected, setting the first antenna channel calibration compensation factor corresponding to the first antenna channel to 0 includes:
when detecting that the downlink antenna channel j has a fault, setting the calibration compensation factor A of the uplink antenna channelj0 and the downlink antenna channel calibration compensation factor Bj＝0。
In the above scheme, 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 corresponding to the downlink antenna channel jjWherein, j ∈ {1, 2, 3 … … K };
correspondingly, when the first antenna channel with the fault is detected, setting the first antenna channel calibration compensation factor corresponding to the first antenna channel to 0 includes:
when detecting that the downlink antenna channel j has a fault, setting a calibration compensation factor B of the downlink antenna channelj＝0。
The embodiment of the invention provides a device for reducing the order of an antenna channel, which comprises:
the detection unit is used for detecting the antenna channel when the antenna is calibrated;
the setting unit is used for setting a first antenna channel calibration compensation factor corresponding to a first antenna channel to be 0 when the detection unit detects that the first antenna channel with a fault exists;
the setting unit is further configured to set a calibration compensation factor of a second antenna channel corresponding to the second antenna channel to be unchanged when the detecting unit detects that the second antenna channel without the fault exists;
the adjusting unit is used for adjusting the forming weight of the antenna according to the antenna channel calibration compensation factor matrix set by the setting unit, so that the forming weight on the antenna corresponding to the first antenna channel calibration compensation factor set by the setting unit is 0, and the antenna order reduction is realized; wherein 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 scheme, the antenna calibration includes uplink antenna channel calibration and downlink antenna channel calibration;
the detection unit is specifically configured to detect an uplink antenna channel during the uplink antenna calibration, and detect a downlink antenna channel during the downlink antenna calibration;
correspondingly, the device further comprises: an acquisition unit;
the obtaining unit is used for obtaining the calibration compensation factor A of the uplink antenna channel before the detection unit detects the uplink antenna channelk(ii) a K is 1, 2, 3 … … K, where K is the maximum number of uplink antennas in the antenna array; and before the detection unit detects the downlink antenna channel, acquiring a calibration compensation factor B of the downlink antenna channelk(ii) a And K is 1, 2 and 3 … … K, and K is the maximum number of downlink antennas in the antenna array.
In the above-mentioned directionIn a case, the first antenna channel detected by the detecting unit is an uplink antenna channel i, and the first antenna channel calibration compensation factor obtained by the obtaining unit is an uplink antenna channel calibration compensation factor a corresponding to the uplink antenna channel iiWherein, i ∈ {1, 2, 3 … … K };
the setting unit is specifically configured to set the uplink antenna channel calibration compensation factor a obtained by the obtaining unit when the detecting unit detects that the uplink antenna channel i has a faulti＝0。
In the above scheme, 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 obtaining unit is an uplink antenna channel calibration compensation factor A corresponding to the uplink antenna channel jjA downlink antenna channel calibration compensation factor B corresponding to the downlink antenna channel jjWherein, j ∈ {1, 2, 3 … … K };
the setting unit is specifically configured to set the uplink antenna channel calibration compensation factor a obtained by the obtaining unit when the detecting unit detects that the downlink antenna channel j has a faultj0, and setting the calibration compensation factor B of the downlink antenna channel acquired by the acquisition unitj＝0。
In the foregoing solution, the first antenna channel detected by the detecting unit is a downlink antenna channel j, and the first antenna channel calibration compensation factor obtained by the obtaining unit is a downlink antenna channel calibration compensation factor B corresponding to the downlink antenna channel jjWherein, j ∈ {1, 2, 3 … … K };
the setting unit is specifically configured to set the calibration compensation factor B of the downlink antenna channel acquired by the acquiring unit when the detecting unit detects that the downlink antenna channel j has a faultj＝0。
The embodiment of the invention provides a method and a device for reducing the order of an antenna channel, which are used for detecting the antenna channel when the antenna is calibrated; when a first antenna channel with a fault is detected, setting a first antenna channel calibration compensation factor corresponding to the first antenna channel to be 0; when a second antenna channel without faults is detected, setting a second antenna channel calibration compensation factor corresponding to the second antenna channel to be unchanged; and adjusting the forming weight of the antenna according to the antenna channel calibration compensation factor matrix to enable the forming weight on the antenna corresponding to the first antenna channel calibration compensation factor to be 0, thereby realizing the order reduction of the antenna. By adopting the above technical implementation scheme, since the order reduction device of the antenna channel performs antenna compensation on the antenna in the antenna array according to the antenna channel calibration compensation factor matrix, as can be understood by those skilled in the art, since the antenna channel calibration factor corresponding to the antenna channel with the fault is 0, all the subcarriers on the detection signal received by using the antenna channel with the fault are 0 (all the frequency domain data are 0), so that the channel estimation of the antenna with the fault after normalization corresponds to 0, and further the calculated forming weight corresponding to the antenna channel with the fault is 0. When the data of all space division users are mapped onto the antenna array by multiplying with the shaped weight matrix, the data of the shaped data on the antenna with the fault is 0, so that the antenna of the base station can more easily realize the reduction of the order of the antenna channel and the elimination of the influence of the antenna channel with the fault on the beam shaping on the basis of not influencing the system performance of the base station and not changing the dimension of the antenna matrix, and the normal operation of the service is ensured.
Drawings
FIG. 1 is a block diagram of an implementation of an embodiment of the present invention;
fig. 2 is a first flowchart of a method for reducing an order of an antenna channel according to an embodiment of the present invention;
fig. 3 is a second flowchart of a method for reducing the order of an antenna channel according to an embodiment of the present invention;
fig. 4 is a first schematic structural diagram of a reduced order apparatus of an antenna channel according to an embodiment of the present invention;
fig. 5 is a second schematic structural diagram of a reduced order apparatus of an antenna channel according to an embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
The new generation of broadband wireless mobile communication system is based on Orthogonal Frequency Division Multiplexing (OFDM) and multi-antenna technology, and performs data transmission with optimized packets comprehensively in the mobile communication air interface technology. The OFDM has frequency selectivity, solves the problem of multipath channel, and greatly improves the utilization rate of frequency band; among the Multiple antenna technologies, the Multiple Input Multiple Output (MIMO) technology separates users using spatial degrees of freedom provided by Multiple antennas. Different users can occupy the same time-frequency resource, so that the signal can inhibit the interference among multiple users through a signal processing algorithm, and the cell throughput is improved through a time-frequency resource multiplexing mode. In smart antennas, beamforming is the most important and common key technology, and makes full use of diversity gain, array gain, and interference suppression gain to improve system performance and improve spectral efficiency.
Specifically, the beamforming technology is a signal processing technology based on an antenna array, and generates a beam with directivity by adjusting a weighting coefficient of each array element in the antenna array, so as to obtain an obvious array gain. The beam forming technology is applied to the antenna array intelligent multi-antenna transmission technology with small distance, and the main principle is that a strong directional radiation directional diagram is generated by utilizing the strong correlation of a space channel and the interference principle of waves, so that the main lobe of the radiation directional diagram is self-adaptively pointed to the incoming wave direction of a user, the signal-to-noise ratio is improved, and the system capacity or the coverage range is increased. For the asymmetry of the uplink and downlink of the wireless radio frequency channel before forming, signals are generally processed in the baseband unit, but the radio frequency channel also belongs to a part of the wireless channel, so that the signals are influenced in various aspects from the baseband unit to the radio frequency unit and then to the wireless port, for example, the uplink and downlink wireless channels of the system cannot keep good consistency due to power amplifiers, filtering, optical cables, temperature and the like. In order to ensure high quality of beamforming, each antenna channel should be calibrated, where the conventional calibration is time domain calibration by RRU, and the embodiment of the present invention is to perform frequency domain calibration by BBU, so as to compensate phase difference and amplitude difference of each channel and improve accuracy of calibration, that is, as shown in fig. 1, the order reduction apparatus 1 for an antenna channel in the embodiment of the present invention is disposed in BBU or is a module connected to BBU, which is not limited in the embodiment of the present invention.
It should be noted that the BBU2 is connected to the RRU3 through an optical fiber, and the RRU is connected to the antenna array 5 through the antenna coupling disk 4.
Example one
An embodiment of the present invention provides a method for reducing an order of an antenna channel, as shown in fig. 2, the method may include:
and S101, detecting an antenna channel when the antenna is calibrated.
In this step, the antenna calibration is performed by the order reduction device of the antenna channel.
It should be noted that the antenna calibration is generally divided into three stages: (1) estimating the amplitude and phase of an antenna channel (estimating the amplitude and phase of the channel by transmitting and receiving a training sequence); (2) judging the state of the antenna channel (judging whether the state of the antenna channel meets the condition of amplitude and phase adjustment); (3) and adjusting the channel amplitude and phase (adjusting the amplitude and phase of each antenna channel to be consistent according to a certain rule).
The antenna calibration is designed for adjusting the amplitudes of all antenna channels to be consistent, but in actual work, the BBU can be assisted to finish fault detection and judgment of the antenna channels, and the embodiment of the invention realizes that the forming weight value in the antenna channel with the fault is 0 by means of an antenna channel calibration compensation factor (calibration coefficient) in the antenna calibration process, thereby eliminating the influence of the antenna with the fault on the beam forming of an antenna array.
In particular, the embodiment of the invention is suitable for any occasion where antenna calibration can be carried out and the intelligent antenna utilizes the beam forming technology.
It should be noted that there are uplink antennas and downlink antennas in the antenna array, and the number of the uplink antennas is the same as that of the downlink antennas, so that the uplink antenna channels correspond to the downlink antenna channels. The order reduction device of the antenna channel can detect the uplink antenna channel firstly and then detect the downlink antenna channel.
Specifically, in the embodiment of the present invention, when the order reduction device of the antenna channel performs antenna calibration, the amplitude phase, the power, hardware, and the like of the antenna channel may be detected. The specific detection method is the prior art, and the embodiment of the invention is not explained here.
Further, in the embodiment of the present invention, the weighting weight in the failed antenna channel is 0 by using the antenna channel calibration compensation factor (calibration coefficient) in the antenna calibration process, where the weighting object of the weighting weight is uplink service data (uplink received data) and downlink service data (downlink broadcast data), so that the data of the failed antenna channel is 0, and the service operation of the failed antenna channel is stopped, thereby ensuring that the service of the antenna channel that has not failed normally operates.
Specifically, on the one hand, the uplink reception service data is 0 on the failed uplink antenna channel, and correct uplink demodulation is performed by using the received signals of other uplink antenna channels that are not failed without changing the uplink reception operation matrix, so that the influence of the failed uplink antenna channel is minimized. On the other hand, the calibration compensation factor of the downlink antenna channel corresponding to the downlink antenna channel with the fault is 0, so that the broadcast data of the downlink broadcast antenna channel on the downlink antenna with the fault is 0, and the influence of the downlink antenna channel with the fault is reduced to the minimum.
S102, when the first antenna channel with the fault is detected, setting a first antenna channel calibration compensation factor corresponding to the first antenna channel to be 0.
Specifically, after the order reduction device of the antenna channel detects the antenna channel, since the antenna channel calibration compensation factor corresponding to each antenna channel is obtained in the antenna calibration process, when the order reduction device of the antenna channel detects the first antenna channel with the fault, the first antenna channel calibration compensation factor corresponding to the first antenna channel may be set to 0.
It should be noted that the antenna channel calibration compensation factors of each antenna in the antenna array form an antenna channel calibration compensation factor matrix. In the process of antenna calibration, each antenna compensates for the difference of amplitude and phase between the antennas, i.e. amplitude and phase adjustment, by multiplying with its corresponding antenna channel calibration compensation factor.
It can be understood that, when an antenna in the antenna array fails, in order to enable the failed antenna not to affect the beam forming of other antennas, the embodiment of the present invention may further achieve the purpose that the final formed data is 0 by enabling the forming weight of the failed antenna on the failed antenna in the beam forming process to be 0.
Exemplarily, assuming that an antenna array has K uplink antenna channels, where K is greater than or equal to 1, a step-down device of the antenna channels detects that a power value of an uplink antenna channel i is abnormal, and then, an antenna channel calibration compensation factor corresponding to the uplink antenna channel i is set to 0; in the embodiment of the present invention, i is numbered from 1, wherein i ∈ {1, 2, 3 … … K }, and the specific number is started, which is not limited in the embodiment of the present invention.
S103, when the second antenna channel without faults is detected, the calibration compensation factor of the second antenna channel corresponding to the second antenna channel is set to be unchanged.
Specifically, after the step-down device of the antenna channel detects the antenna channel, the antenna channel calibration compensation factor for the detected antenna channel without failure does not need to be obtained when the antenna calibration is changed. Therefore, when the order reduction device of the antenna channel detects that there is no faulty second antenna channel, the order reduction device of the antenna channel may not change the calibration compensation factor of the second antenna channel corresponding to the second antenna channel.
It should be noted that S102 and S103 are optional steps after S101, and one of the steps is selected to be executed according to an actual detection situation; that is, in the embodiment of the present invention, after S101, S102 may be executed, or S103 may also be executed, and the specific execution sequence may be determined according to the actual situation, which is not limited in the embodiment of the present invention.
S104, adjusting the forming weight of the antenna according to the antenna channel calibration compensation factor matrix to enable the forming weight on the antenna corresponding to the first antenna channel calibration compensation factor to be 0, and realizing antenna reduction; wherein the antenna channel calibration compensation factor matrix includes the first antenna channel calibration compensation factor and a second antenna channel calibration compensation factor.
Specifically, the order reduction device of the antenna channel performs antenna compensation on the antennas in the antenna array according to the antenna channel calibration compensation factor matrix, and those skilled in the art can understand that since the first antenna channel calibration factor is 0, all subcarriers on the received sounding signal using the first antenna channel are 0 (all frequency domain data are 0), so that the channel estimation of the normalized first antenna is corresponding to 0, and further the calculated forming weight corresponding to the first antenna channel is 0. When the data of all space division users are mapped onto the antenna array by multiplying with the shaped weight matrix, 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 influenced.
For example, assuming that an antenna array has K uplink antenna channels, where K is greater than or equal to 1, a step reduction device of an antenna channel detects that a power value of an uplink antenna channel i is abnormal, and an antenna channel calibration compensation factor corresponding to the uplink antenna channel i is 0, so those skilled in the art can understand that subcarriers on a detection signal received by using the uplink antenna channel i are all 0, so that i +1 th columns in a channel estimation matrix of the normalized uplink antenna i are all 0, and further i +1 th rows in a beamforming weight matrix of the uplink antenna channel i are all 0. When the data of all space division users are mapped to K antennas by multiplying with a forming weight matrix, the data of the forming data on an antenna i is 0, namely the K-1 antennas essentially normally perform service data, and the normal operation of the service data on other K-1 antennas in the antenna array is not influenced; where i ∈ {1, 2, 3 … … K }.
It should be noted that the cases of the uplink antenna channel failing and the downlink antenna channel failing can be divided into three types, and a specific process will be described in the following embodiments.
According to the order reduction method for the antenna channel, provided by the embodiment of the invention, the antenna channel is detected when the antenna is calibrated; when a first antenna channel with a fault is detected, setting a first antenna channel calibration compensation factor corresponding to the first antenna channel to be 0; when a second antenna channel without faults is detected, setting a second antenna channel calibration compensation factor corresponding to the second antenna channel to be unchanged; and adjusting the forming weight of the antenna according to the antenna channel calibration compensation factor matrix to enable the forming weight on the antenna corresponding to the first antenna channel calibration compensation factor to be 0, thereby realizing the order reduction of the antenna. By adopting the above technical implementation scheme, since the order reduction device of the antenna channel performs antenna compensation on the antenna in the antenna array according to the antenna channel calibration compensation factor matrix, as can be understood by those skilled in the art, since the antenna channel calibration factor corresponding to the antenna channel with the fault is 0, all the subcarriers on the detection signal received by using the antenna channel with the fault are 0 (all the frequency domain data are 0), so that the channel estimation of the antenna with the fault after normalization corresponds to 0, and further the calculated forming weight corresponding to the antenna channel with the fault is 0. When the data of all space division users are mapped onto the antenna array by multiplying with the shaped weight matrix, the data of the shaped data on the antenna with the fault is 0, so that the antenna of the base station can more easily realize the reduction of the order of the antenna channel and the elimination of the influence of the antenna channel with the fault on the beam shaping on the basis of not influencing the system performance of the base station and not changing the dimension of the antenna matrix, and the normal operation of the service is ensured.
Example two
An embodiment of the present invention provides a method for reducing an order of an antenna channel, as shown in fig. 3, where the embodiment of the present invention is described with a step reduction apparatus of an antenna channel as an execution main body, the method may include:
s201, when an uplink antenna is calibrated by the order reduction device of the antenna channel, acquiring an uplink antenna channel calibration compensation factor Ak; and K is 1, 2 and 3 … … K, and 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 stages: (1) estimating the amplitude and phase of an antenna channel (estimating the amplitude and phase of the channel by transmitting and receiving a training sequence); (2) judging the state of the antenna channel (judging whether the state of the antenna channel meets the condition of amplitude and phase adjustment); (3) and adjusting the channel amplitude and phase (adjusting the amplitude and phase of each antenna channel to be consistent according to a certain rule).
The antenna calibration is designed for adjusting the amplitudes of all antenna channels to be consistent, but in actual work, the BBU can be assisted to finish fault detection and judgment of the antenna channels, and the embodiment of the invention realizes that the forming weight value in the antenna channel with the fault is 0 by means of an antenna channel calibration compensation factor (calibration coefficient) in the antenna calibration process, thereby eliminating the influence of the antenna with the fault on the beam forming of an antenna array.
It should be noted that the uplink antenna channel is a receiving channel and can receive signals.
In particular, the embodiment of the invention is suitable for any occasion where antenna calibration can be carried out and the intelligent antenna utilizes the beam forming technology.
It should be noted that there are uplink antennas and downlink antennas in the antenna array, and the number of the uplink antennas is the same as that of the downlink antennas, so that the uplink antenna channels correspond to the downlink antenna channels. The order reduction device of the antenna channel can detect the uplink antenna channel firstly and then detect the downlink antenna channel.
Specifically, when the order reduction device of the antenna channel performs uplink antenna calibration, the uplink antenna channel calibration compensation factors Ak corresponding to the uplink antenna are respectively obtained through the existing calculation mode; and K is 1, 2 and 3 … … K, and K is the maximum number of uplink antennas in the antenna array.
It should be noted that Ak 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, and a specific representation manner of the uplink antenna channel calibration compensation factor is not limited in the embodiment of the present invention.
S202, the antenna channel order reduction device detects the uplink antenna channel.
When the order reduction device of the antenna channel performs uplink antenna calibration, after the uplink antenna channel calibration compensation factor Ak is obtained, K is 1, 2, 3 … … K, and K is the maximum uplink antenna channel calibration compensation factor in the antenna array. Then, the order reduction device of the antenna channel detects K uplink antenna channels corresponding to the K uplink antennas.
In the embodiment of the present invention, the order reduction apparatus of the antenna channel may detect the amplitude phase, the power, the hardware, and the like of the uplink antenna channel. The specific detection method is the prior art, and the embodiment of the invention is not explained here.
S203, when the order reduction device of the antenna channel detects that the uplink antenna channel i has a fault, setting an uplink antenna channel calibration compensation factor Ai to be 0; where i ∈ {1, 2, 3 … … K }.
Specifically, after the uplink antenna channels are detected by the order reduction device of the antenna channel, because the calibration compensation factor Ak of the antenna channel corresponding to each uplink antenna channel is obtained in the uplink antenna calibration process, when the order reduction device of the antenna channel detects the uplink antenna channel i with a fault, the shaping weight of the uplink antenna channel j is adjusted so that the uplink antenna channel i with the fault does not affect the final shaping angle of the antenna, that is, the calibration compensation factor Ai of the uplink antenna channel corresponding to the uplink antenna channel i can be set to 0; where i ∈ {1, 2, 3 … … K }.
It should be noted that the antenna channel calibration compensation factors of each antenna in the antenna array form an antenna channel calibration compensation factor matrix. In the process of antenna calibration, each antenna compensates for the difference of amplitude and phase between the antennas, i.e. amplitude and phase adjustment, by multiplying with its corresponding antenna channel calibration compensation factor.
In this embodiment of the present invention, the first antenna channel in the foregoing embodiment is an uplink antenna channel i, and the first antenna channel calibration compensation factor in the foregoing embodiment is an uplink antenna channel calibration compensation factor Ai corresponding to the uplink antenna channel i.
It can be understood that, when an antenna in the antenna array fails, in order to enable the failed antenna not to affect the beam forming of other antennas, the embodiment of the present invention may further achieve the purpose that the final formed data is 0 by enabling the forming weight of the failed antenna on the failed antenna in the beam forming process to be 0.
Further, when the antenna channel order reduction device detects that a plurality of antenna channels have a fault, the antenna channel order reduction device sets a plurality of antenna channel calibration compensation factors corresponding to the plurality of faulty antenna channels to 0.
Exemplarily, assuming that an antenna array has K uplink antenna channels, where K is greater than or equal to 1, a step-down device of the antenna channels detects that a power value of an uplink antenna channel i is abnormal, and then, an antenna channel calibration compensation factor Ai corresponding to the uplink antenna channel i is set to 0; in the embodiment of the present invention, i is numbered from 1, wherein i ∈ {1, 2, 3 … … K }, and the specific number is started, which is not limited in the embodiment of the present invention.
S204, when the order reduction device of the antenna channel detects the uplink antenna channel t without faults, setting the calibration compensation factor At of the uplink antenna channel corresponding to the uplink antenna channel t to be unchanged; wherein t ∈ {1, 2, 3 … … K }.
Specifically, after the step-down device of the antenna channel detects the uplink antenna channel, the uplink antenna channel calibration compensation factor At of the detected uplink antenna channel t without the fault is the antenna channel calibration compensation factor obtained when the antenna calibration does not need to be changed. Therefore, when the order reduction device of the antenna channel detects the uplink antenna channel t without a fault, the order reduction device of the antenna channel may not change the uplink antenna channel calibration compensation factor At corresponding to the uplink antenna channel t, where t ∈ {1, 2, 3 … … K }.
In the embodiment of the present invention, t is numbered from 1, wherein t ∈ {1, 2, 3 … … K }, and the specific number is started, which is not limited in the embodiment of the present invention.
It should be noted that S203 and S204 are optional steps after S202, and one of the steps is selected to be executed according to an actual detection situation; that is to say, in the embodiment of the present invention, after S202, S203 may be executed, or S204 may also be executed, and the specific execution sequence may be determined according to the actual situation, which is not limited in the embodiment of the present invention.
S205, acquiring a downlink antenna channel calibration compensation factor Bk when the downlink antenna calibration is carried out by the order reduction device of the antenna channel; and K is 1, 2 and 3 … … K, and K is the maximum number of downlink antennas in the antenna array.
It should be noted that there are uplink antennas and downlink antennas in the antenna array, and the number of the uplink antennas is the same as that of the downlink antennas, so that the uplink antenna channels correspond to the downlink antenna channels. The order reduction device of the antenna channel can detect the uplink antenna channel firstly, and then detect the downlink antenna channel after finishing the setting of the calibration compensation factor of the uplink antenna channel.
Specifically, when the order reduction device of the antenna channel performs downlink antenna calibration, the calibration compensation factors Bk of the downlink antenna channel corresponding to the downlink antenna are respectively obtained through the existing calculation mode; and K is 1, 2 and 3 … … K, and K is the maximum number of downlink antennas in the antenna array.
In the embodiment of the invention, the downlink antenna channel is a transmitting channel and can transmit signals.
It should be noted that Bk 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, and a specific representation manner of the downlink antenna channel calibration compensation factor is not limited in the embodiment of the present invention.
And S206, detecting the downlink antenna channel by the antenna channel order reduction device.
When the order reduction device of the antenna channel performs downlink antenna calibration, after the calibration compensation factor Bk of the downlink antenna channel is obtained, K is 1, 2, 3 … … K, and K is the maximum calibration compensation factor of the downlink antenna channel in the antenna array. Then, the order reduction device of the antenna channel detects K downlink antenna channels corresponding to the K downlink antennas.
In the embodiment of the present invention, the order reduction apparatus of the antenna channel may detect the amplitude phase, the power, the hardware, and the like of the downlink antenna channel. The specific detection method is the prior art, and the embodiment of the invention is not explained here.
S207, when the order reduction apparatus of the antenna channel detects that the downlink antenna channel j has a fault, setting the calibration compensation factor Aj of the uplink antenna channel to 0 and the calibration compensation factor Bj of the downlink antenna channel to 0; where j ∈ {1, 2, 3 … … K }.
In this embodiment of the present invention, the first antenna channel in the foregoing embodiment is a downlink antenna channel j, and the first antenna channel calibration compensation factor in the foregoing embodiment is an uplink antenna channel calibration compensation factor Aj corresponding to the uplink antenna channel j and a downlink antenna channel calibration compensation factor Bj corresponding to the downlink antenna channel j.
Specifically, after the step-down device of the antenna channel detects the downlink antenna channel, because the antenna channel calibration compensation factor Bk corresponding to each downlink antenna channel is obtained in the downlink antenna calibration process, when the step-down device of the antenna channel detects the downlink antenna channel j with a fault, the uplink antenna channel calibration compensation factor Aj with the same number as that of the downlink antenna channel j is set to 0, and the downlink antenna channel calibration compensation factor Bj corresponding to the downlink antenna channel j is set to 0; where j ∈ {1, 2, 3 … … K }.
It should be noted that when the downlink antenna channel j fails, the transmitted signal of the failed channel can be ensured to be 0 by setting the calibration compensation factor of the downlink antenna channel to zero, and meanwhile, in order that the failed downlink antenna channel j does not affect the final forming angle of the antenna, the forming weight of the downlink antenna channel j is adjusted, that is, the calibration compensation factor Aj of the uplink antenna channel corresponding to the number j is set to 0.
Further, when the order reduction apparatus of the antenna channel detects that the downlink antenna channel j has a fault, only the calibration compensation factor Bj of the downlink antenna channel may be set to 0.
At this time, the first antenna channel in the foregoing embodiment is the downlink antenna channel j, and the first antenna channel calibration compensation factor in the foregoing embodiment is the downlink antenna channel calibration compensation factor Bj corresponding to the downlink antenna channel j.
For example: when the downlink antenna channel is a broadcast channel, the broadcast channel comprises various control channels, the direct adjustment of the broadcast weight value is complex, at this time, the transmitted signal of the failed broadcast channel can be made to be zero by setting the calibration compensation factor of the downlink antenna channel of the failed downlink channel to be zero, and the transmitted signal of the broadcast channel is zero to influence the power gain of broadcast coverage, but not influence the forming angle, so that under the condition, only the calibration compensation factor of the downlink antenna channel needs to be set to be 0.
The specific processing procedure of the broadcast channel is as follows: assume that the data of port p is dpCompleting the antenna ka after the mapping from the port to the antennaRxData of
Figure GDA0002484897830000151
Then:
Figure GDA0002484897830000152
wherein the content of the first and second substances,
Figure GDA0002484897830000153
is the broadcast weight, dpIn order to broadcast the data, it is,
Figure GDA0002484897830000154
the broadcast data after weighted mapping.
Re-aligning the mapped data according to equation (2)
Figure GDA0002484897830000155
And carrying out antenna calibration.
Figure GDA0002484897830000156
Wherein the content of the first and second substances,
Figure GDA0002484897830000157
calibration compensation for downlink antenna channelsFactor matrix, dIFFTIs calibrated broadcast data. When a certain downlink antenna channel of the broadcast is failed,
Figure GDA0002484897830000158
and the calibration compensation factor of the downlink antenna channel corresponding to the certain downlink antenna channel is set to be 0.
It can be understood that, since the order reduction apparatus of the antenna channel has set the calibration compensation factor of the downlink broadcast antenna channel of the failed antenna channel to be 0, the downlink broadcast data on the failed downlink broadcast antenna channel is 0 when performing downlink broadcast on the downlink broadcast antenna channel, so that the normal operation of the service of other downlink broadcast antenna channels that are not failed is not affected.
S208, when the order reduction apparatus of the antenna channel detects that the downlink antenna channel j and the uplink antenna channel j have a fault, setting the calibration compensation factor Bj of the downlink antenna channel to 0 and the calibration compensation factor Aj of the uplink antenna channel to 0; where j ∈ {1, 2, 3 … … K }.
In this embodiment of the present invention, the first antenna channel in the foregoing embodiment is a downlink antenna channel j and an uplink antenna channel j, and the first antenna channel calibration compensation factor in the foregoing embodiment is an uplink antenna channel calibration compensation factor Aj corresponding to the uplink antenna channel j and a downlink antenna channel calibration compensation factor Bj corresponding to the downlink antenna channel j. Specifically, after the order reduction device of the antenna channel detects the downlink antenna channel, because the antenna channel calibration compensation factor Bk corresponding to each downlink antenna channel and the antenna channel calibration compensation factor Ak corresponding to each uplink antenna channel are obtained in the downlink antenna calibration process, when the order reduction device of the antenna channel detects a downlink antenna channel j and an uplink antenna channel j with a fault, the downlink antenna channel calibration compensation factor Bj corresponding to the downlink antenna channel j may be set to 0, and the uplink antenna channel calibration compensation factor Aj corresponding to the uplink antenna channel j may be set to 0; where j ∈ {1, 2, 3 … … K }.
S209, when the order reduction device of the antenna channel detects the downlink antenna channel n without fault, setting the calibration compensation factor Bn of the downlink antenna channel corresponding to the downlink antenna channel n to be unchanged; where n ∈ {1, 2, 3 … … K }.
Specifically, after the step-down device of the antenna channel detects the downlink antenna channel, the antenna channel calibration compensation factor Bn of the detected downlink antenna channel n without the fault is the antenna channel calibration compensation factor obtained when the antenna calibration does not need to be changed. Therefore, when the order reduction device of the antenna channel detects the downlink antenna channel n without a fault, the order reduction device of the antenna channel can not change the calibration compensation factor Bn of the downlink antenna channel corresponding to the downlink antenna channel n; where n ∈ {1, 2, 3 … … K }.
In the embodiment of the present invention, n is numbered from 1, where n ∈ {1, 2, 3 … … K }, and the specific number is started, 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, and one of the steps is selected to be executed according to an actual detection situation; that is to say, in the embodiment of the present invention, after S206, S207, S208, or S209 may be executed, and the specific execution sequence may be determined according to actual situations, which is not limited in the embodiment of the present invention.
S210, adjusting a forming weight of an antenna by an antenna channel order reduction device according to an antenna channel calibration compensation factor matrix to enable the forming weight of the antenna with an antenna channel calibration compensation factor of 0 to be 0, and realizing antenna order reduction; the antenna channel calibration compensation factor matrix comprises K antenna channel calibration compensation factors corresponding to K antennas.
After the order reduction device of the antenna channel sets the antenna channel calibration compensation factor of the antenna channel with the fault, the order reduction device of the antenna channel performs antenna compensation on the antenna in the antenna array according to the antenna channel calibration compensation factor matrix, and as the antenna channel calibration factor corresponding to the antenna channel with the fault is 0, all subcarriers on the detection signal received by using the antenna channel with the fault are 0 (all frequency domain data are 0), so that the channel estimation of the antenna with the fault after normalization is corresponding to 0, and further, the calculated shaping weight corresponding to the antenna channel with the fault is 0. When the data of all space division users are mapped onto the antenna array by multiplying with the forming weight matrix, the data of the forming data on the failed antenna is 0, so that the forming angle and the normal operation of downlink service data on other non-failed antennas in the antenna array are not influenced; the antenna channel calibration compensation factor matrix comprises K antenna channel calibration compensation factors corresponding to K antennas.
For example, assuming that an antenna array has K uplink antenna channels, where K is greater than or equal to 1, a step reduction device of an antenna channel detects that a power value of an uplink antenna channel i is abnormal, and an antenna channel calibration compensation factor corresponding to the uplink antenna channel i is 0, so those skilled in the art can understand that subcarriers on a detection signal received by using the uplink antenna channel i are all 0, so that i +1 th columns in a channel estimation matrix of the normalized uplink antenna i are all 0, and further i +1 th rows in a beamforming weight matrix of the uplink antenna channel i are all 0. When the data of all space division users are mapped to K antennas by multiplying with a forming weight matrix, the data of the forming data on an antenna i is 0, namely the K-1 antennas essentially normally perform service data, and the normal operation of the service data on other K-1 antennas in the antenna array is not influenced; where i ∈ {1, 2, 3 … … K }.
It should be noted that, for the shaped data of the user service, the uplink antenna channel calibration compensation factor of the corresponding antenna channel is set to 0 through the description in the uplink antenna channel fault, and the purpose of adjusting the shaped weight value is already achieved.
Specifically, in the antenna calibration process of the 64-antenna array, it is assumed that after the received signals of the uplink antennas are subjected to fourier transform, the subcarriers of the 1200 extracted sounding signals are yf (k, ka)RxL), k is the subcarrier index, kaRxFor the receive antenna index, l is the symbol index, wup_ACAn antenna channel calibration compensation factor matrix consisting of K antenna channel calibration compensation factors, where kaRxK receiving antennas are shared by 0, 1 … … and K,antenna calibration compensated signal fsrs(k，kaRxAnd l) is:
fsrs(k，kaRx，l)＝yf(k，kaRx，l)·wup_AC(k，kaRx) (3)
will be the number kaRxThe antenna channel calibration compensation factor corresponding to the root antenna is set to 0, so that all subcarriers on the detection signal received by the fault antenna channel are zero, and further, the normalized channel estimation value is assumed to be hsrs(kaRxM, Ni, q), where kaRxFor receiving antenna index, m is RB index, Ni is space division user index, and q is stream number index of single user, when calculating the beamforming weight, an overall channel matrix is first constructed, that is, each RB constructs h (m), where m is 1, …, 100. Assuming that the number of streams per user is two, h (m) is as follows.
Figure GDA0002484897830000181
The dimension of this matrix H (m) is [2Ni × K ]]The horizontal direction is 64 antennas arranged in order, and the vertical direction is Ni users' antennas 1 and 2 arranged in order. Since the sub-carrier on the detection signal received by the faulty antenna channel is set to 0, the channel estimation H of the corresponding antenna channel obtained according to the linear operation is also 0, assuming that the faulty antenna channel is i (numbered from 0), the (i + 1) th column of the H (m) matrix is all 0, and then the space division forming weight matrix W is calculatedMU(m) matrix dimension of [ K × 2Ni]，WMU(m)＝HH(m)(H(m)·HH(m))-1And m is 1, … …, 100. Since the i +1 th column of the H matrix is all 0, the matrix W can be derived from the matrix operationMUThe i +1 th rows of (m) are all 0. Assume that the data of port p is dpCompleting the antenna ka after the mapping from the port to the antennaRxData of
Figure GDA0002484897830000182
The user data forming process is
Figure GDA0002484897830000183
From the number 2Ni of the air separation users
Figure GDA0002484897830000184
Has a dimension of [1 × 2Ni]And mapping the data of all space division users to K antennas by matrix multiplication. Because of the matrix WMUAnd (m) th row (i + 1) is all 0, so that the final shaped data is 0 on the (i + 1) th antenna.
It should be noted that, a failure of a certain Uplink reception Channel may also affect antenna reception of channels such as a Physical Uplink Shared Channel (PUSCH), a Physical Random Access Channel (PRACH), and a Physical Uplink Control Channel (PUCCH). Since the up antenna channel calibration compensation factor of the faulty antenna channel has already been set to 0 by the order reduction apparatus of the antenna channel, the influence of the faulty up antenna channel will be minimized.
Specifically, for PRACH and PUCCH channels, because the sub-antennas perform operation and then perform equal gain combining in the uplink demodulation process in the prior art, the order reduction device of the antenna channel sets the uplink antenna channel calibration compensation factor, so that the uplink antenna channel receives frequency domain data of 0, and the reception gain of the normal antenna channel is not affected.
It can be understood that, since the order reduction apparatus of the antenna channel has set the calibration compensation factor of the uplink receiving antenna channel of the failed antenna channel to be 0, the uplink receiving data on the failed uplink receiving antenna channel is 0 when performing uplink receiving demodulation on the uplink receiving antenna channel, so as not to affect the normal operation of the service of other uplink receiving antenna channels that are not failed.
It should be noted that, for the PUSCH channel, channel estimation is performed by antenna in the prior art, and is not affected, but when equalization processing is performed on the PUSCH channel, because a certain uplink antenna signal is zero, an interference matrix is lack of rank and thus inversion cannot be performed, and at this time, a small-factor matrix compensation method in the prior art may be used to avoid a process that inversion cannot be performed. Therefore, the order reduction device of the antenna channel can ensure the downlink forming performance and the uplink receiving and demodulating performance under the condition that the relevant processing dimensionality of the base station antenna is not changed by setting the uplink antenna channel calibration compensation factor of the uplink corresponding channel to be 0.
According to the order reduction method for the antenna channel, provided by the embodiment of the invention, the antenna channel is detected when the antenna is calibrated; when a first antenna channel with a fault is detected, setting a first antenna channel calibration compensation factor corresponding to the first antenna channel to be 0; when a second antenna channel without faults is detected, setting a second antenna channel calibration compensation factor corresponding to the second antenna channel to be unchanged; and adjusting the forming weight of the antenna according to the antenna channel calibration compensation factor matrix to enable the forming weight on the antenna corresponding to the first antenna channel calibration compensation factor to be 0, thereby realizing the order reduction of the antenna. By adopting the above technical implementation scheme, since the order reduction device of the antenna channel performs antenna compensation on the antenna in the antenna array according to the antenna channel calibration compensation factor matrix, as can be understood by those skilled in the art, since the antenna channel calibration factor corresponding to the antenna channel with the fault is 0, all the subcarriers on the detection signal received by using the antenna channel with the fault are 0 (all the frequency domain data are 0), so that the channel estimation of the antenna with the fault after normalization corresponds to 0, and further the calculated forming weight corresponding to the antenna channel with the fault is 0. When the data of all space division users are mapped to the antenna array by multiplying with the shaped weight matrix, the data of the shaped data on the antenna with the fault is 0, and the order reduction device of the antenna channel enables the antenna of the base station to more easily realize the order reduction of the antenna channel and the elimination of the influence of the antenna channel with the fault on the beam shaping on the basis of not influencing the system performance of the base station and not changing the dimension of the antenna matrix, thereby ensuring the normal operation of the service.
EXAMPLE III
As shown in fig. 4, the present invention provides an antenna channel order reduction apparatus 1, where the apparatus 1 may include:
and a detection unit 10 for detecting the antenna channel when the antenna calibration is performed.
A setting unit 11, configured to set a first antenna channel calibration compensation factor corresponding to the first antenna channel to 0 when the detecting unit 10 detects that the first antenna channel has a fault.
The setting unit 11 is further configured to, when the detecting unit 10 detects that there is no faulty second antenna channel, set the calibration compensation factor of the second antenna channel corresponding to the second antenna channel to be unchanged.
An adjusting unit 12, configured to adjust a forming weight of an antenna according to the antenna channel calibration compensation factor matrix set by the setting unit 11, so that the forming weight on the antenna corresponding to the first antenna channel calibration compensation factor set by the setting unit 11 is 0, and implement antenna order reduction; wherein, 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 11.
Optionally, the antenna calibration includes uplink antenna channel calibration and downlink antenna channel calibration.
The detection unit 10 is specifically configured to detect an uplink antenna channel during the uplink antenna calibration, and detect a downlink antenna channel during the downlink antenna calibration.
Optionally, as shown in fig. 5, the apparatus 1 further includes: an acquisition unit 13.
The obtaining unit 13 is configured to obtain an uplink antenna channel calibration compensation factor Ak before the detecting unit 10 detects the uplink antenna channel; k is 1, 2, 3 … … K, where K is the maximum number of uplink antennas in the antenna array; before the detection unit 10 detects the downlink antenna channel, a downlink antenna channel calibration compensation factor Bk is obtained; and K is 1, 2 and 3 … … K, and K is the maximum number of downlink antennas in the antenna array.
Optionally, the first antenna channel detected by the detection unit 10 is an uplink antenna channel i, and the first antenna channel calibration compensation factor obtained by the obtaining unit 13 is an uplink antenna channel calibration compensation factor Ai corresponding to the uplink antenna channel i, where i belongs to {1, 2, 3 … … K }.
The setting unit 11 is specifically configured to set the uplink antenna channel calibration compensation factor Ai obtained by the obtaining unit 13 to 0 when the detecting unit 10 detects that the uplink antenna channel i has a fault.
Optionally, the first antenna channel detected by the detection unit 10 is a downlink antenna channel j, or the first antenna channel detected by the detection unit 10 is a downlink antenna channel j and an uplink antenna channel j.
The first antenna channel calibration compensation factor obtained by the obtaining unit 13 is an uplink antenna channel calibration compensation factor Aj corresponding to the uplink antenna channel j and a downlink antenna channel calibration compensation factor Bj corresponding to the downlink antenna channel j, where j belongs to {1, 2, 3 … … K }.
The setting unit 11 is specifically configured to set the uplink antenna channel calibration compensation factor Aj ═ 0 acquired by the acquiring unit 13 and set the downlink antenna channel calibration compensation factor Bj ═ 0 acquired by the acquiring unit 13 when the detecting unit 10 detects that the downlink antenna channel j has a fault.
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 obtained by the obtaining unit 13 is a downlink antenna channel calibration compensation factor Bj corresponding to the downlink antenna channel j, where j ∈ {1, 2, 3 … … K }.
The setting unit 11 is specifically configured to set the calibration compensation factor Bj of the downlink antenna channel obtained by the obtaining unit 13 to 0 when the detecting unit 10 detects that the downlink antenna channel j has a fault.
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 be implemented 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 order reduction device in the embodiment of the present invention may be a single device, or may be a combination of some modules in the existing antenna beam forming and antenna calibration processes, and the specific implementation manner is not limited in the embodiment of the present invention.
The antenna price reducing device provided by the embodiment of the invention detects the antenna channel by calibrating the antenna; when a first antenna channel with a fault is detected, setting a first antenna channel calibration compensation factor corresponding to the first antenna channel to be 0; when a second antenna channel without faults is detected, setting a second antenna channel calibration compensation factor corresponding to the second antenna channel to be unchanged; and adjusting the forming weight of the antenna according to the antenna channel calibration compensation factor matrix to enable the forming weight on the antenna corresponding to the first antenna channel calibration compensation factor to be 0, thereby realizing the order reduction of the antenna. By adopting the above technical implementation scheme, since the order reduction device of the antenna channel performs antenna compensation on the antenna in the antenna array according to the antenna channel calibration compensation factor matrix, as can be understood by those skilled in the art, since the antenna channel calibration factor corresponding to the antenna channel with the fault is 0, all the subcarriers on the detection signal received by using the antenna channel with the fault are 0 (all the frequency domain data are 0), so that the channel estimation of the antenna with the fault after normalization corresponds to 0, and further the calculated forming weight corresponding to the antenna channel with the fault is 0. When the data of all space division users are mapped to the antenna array by multiplying with the shaped weight matrix, the data of the shaped data on the antenna with the fault is 0, and the order reduction device of the antenna channel enables the antenna of the base station to more easily realize the order reduction of the antenna channel and the elimination of the influence of the antenna channel with the fault on the beam shaping on the basis of not influencing the system performance of the base station and not changing the dimension of the antenna matrix, thereby ensuring the normal operation of the service.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims (10)

1. A method for reducing an order of an antenna channel, the method comprising:
when the antenna is calibrated, detecting an antenna channel;
when a first antenna channel with a fault is detected, setting a first antenna channel calibration compensation factor corresponding to the first antenna channel to be 0;
when a second antenna channel without faults is detected, setting a second antenna channel calibration compensation factor corresponding to the second antenna channel to be unchanged;
adjusting the forming weight of the antenna according to the antenna channel calibration compensation factor matrix to enable the forming weight on the antenna corresponding to the first antenna channel calibration compensation factor to be 0, and realizing antenna order reduction; wherein the antenna channel calibration compensation factor matrix includes the first antenna channel calibration compensation factor and the second antenna channel calibration compensation factor.
2. The method of claim 1, wherein the antenna calibration comprises an uplink antenna channel calibration and a downlink antenna channel calibration;
when carrying out antenna calibration, detect the antenna channel, include:
detecting an uplink antenna channel when the uplink antenna is calibrated, and detecting a downlink antenna channel when the downlink antenna is calibrated;
correspondingly, before the detecting the uplink antenna channel, the method further includes:
obtaining the calibration compensation factor A of the uplink antenna channelk(ii) a K is 1, 2, 3 … … K, where 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 calibration compensation factor B of a downlink antenna channelk(ii) a And K is 1, 2 and 3 … … K, and K is the maximum number of downlink antennas in the antenna array.
3. The method of claim 2, wherein the first step is performed by a first antenna channelThe 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 corresponding to the uplink antenna channel iiWherein, i ∈ {1, 2, 3 … … K };
correspondingly, when the first antenna channel with the fault is detected, setting the first antenna channel calibration compensation factor corresponding to the first antenna channel to 0 includes:
when the uplink antenna channel i is detected to have faults, setting the calibration compensation factor A of the uplink antenna channeli＝0。
4. The method of claim 2, wherein 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 Aj corresponding to the uplink antenna channel j and a downlink antenna channel calibration compensation factor Bj corresponding to the downlink antenna channel j, wherein j belongs to {1, 2, 3 … … K };
correspondingly, when the first antenna channel with the fault is detected, setting the first antenna channel calibration compensation factor corresponding to the first antenna channel to 0 includes:
and when the downlink antenna channel j is detected to have a fault, setting the uplink antenna channel calibration compensation factor Aj to be 0 and the downlink antenna channel calibration compensation factor Bj to be 0.
5. The method of 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 compensation factor Bj corresponding to the downlink antenna channel j, where j ∈ {1, 2, 3 … … K };
correspondingly, when the first antenna channel with the fault is detected, setting the first antenna channel calibration compensation factor corresponding to the first antenna channel to 0 includes:
and when detecting that the downlink antenna channel j has a fault, setting the calibration compensation factor Bj of the downlink antenna channel to be 0.
6. An apparatus for reducing an order of an antenna channel, the apparatus comprising:
the detection unit is used for detecting the antenna channel when the antenna is calibrated;
the setting unit is used for setting a first antenna channel calibration compensation factor corresponding to a first antenna channel to be 0 when the detection unit detects that the first antenna channel with a fault exists;
the setting unit is further configured to set a calibration compensation factor of a second antenna channel corresponding to the second antenna channel to be unchanged when the detecting unit detects that the second antenna channel without the fault exists;
the adjusting unit is used for adjusting the forming weight of the antenna according to the antenna channel calibration compensation factor matrix set by the setting unit, so that the forming weight on the antenna corresponding to the first antenna channel calibration compensation factor set by the setting unit is 0, and the antenna order reduction is realized; wherein 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 apparatus of claim 6, wherein the antenna calibration comprises an uplink antenna channel calibration and a downlink antenna channel calibration;
the detection unit is specifically configured to detect an uplink antenna channel during the uplink antenna calibration, and detect a downlink antenna channel during the downlink antenna calibration;
correspondingly, the device further comprises: an acquisition unit;
the obtaining unit is used for obtaining the calibration compensation factor A of the uplink antenna channel before the detection unit detects the uplink antenna channelk(ii) a Wherein K is 1, 2, 3 … … K, and K is the most important antenna arrayA large number of uplink antennas; and before the detection unit detects the downlink antenna channel, acquiring a calibration compensation factor B of the downlink antenna channelk(ii) a And K is 1, 2 and 3 … … K, and K is the maximum number of downlink antennas in the antenna array.
8. The apparatus 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 obtained by the obtaining unit is an uplink antenna channel calibration compensation factor a corresponding to the uplink antenna channel iiWherein, i ∈ {1, 2, 3 … … K };
the setting unit is specifically configured to set the uplink antenna channel calibration compensation factor a obtained by the obtaining unit when the detecting unit detects that the uplink antenna channel i has a faulti＝0。
9. The apparatus of claim 7, wherein 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 obtaining unit is an uplink antenna channel calibration compensation factor Aj corresponding to the uplink antenna channel j and a downlink antenna channel calibration compensation factor Bj corresponding to the downlink antenna channel j, wherein j belongs to {1, 2, 3 … … K };
the setting unit is specifically configured to set the uplink antenna channel calibration compensation factor Aj that is obtained by the obtaining unit to 0 and set the downlink antenna channel calibration compensation factor Bj that is obtained by the obtaining unit to 0 when the detecting unit detects that the downlink antenna channel j has a fault.
10. The apparatus for reducing the order of an 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 obtained by the obtaining unit is a downlink antenna channel calibration compensation factor Bj corresponding to the downlink antenna channel j, where j ∈ {1, 2, 3 … … K };
the setting unit is specifically configured to set the calibration compensation factor Bj of the downlink antenna channel obtained by the obtaining unit to 0 when the detecting unit detects that the downlink antenna channel j has a fault.
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