CN110391825A - A kind of transmitting of multiaerial system and method for reseptance and device - Google Patents

A kind of transmitting of multiaerial system and method for reseptance and device Download PDF

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Publication number
CN110391825A
CN110391825A CN201810355732.0A CN201810355732A CN110391825A CN 110391825 A CN110391825 A CN 110391825A CN 201810355732 A CN201810355732 A CN 201810355732A CN 110391825 A CN110391825 A CN 110391825A
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China
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weight
terminal
data
signal
matrix
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CN201810355732.0A
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Chinese (zh)
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CN110391825B (en
Inventor
伯琳
刘云
夏欣
陈卫民
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上海华为技术有限公司
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Priority claimed from CN201810355732.0A external-priority patent/CN110391825B/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0408Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413MIMO systems
    • H04B7/0456Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity 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
    • H04B7/0615Diversity 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
    • H04B7/0617Diversity 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
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; Arrangements for supplying electrical power along data transmission lines
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; Arrangements for supplying electrical power along data transmission lines
    • H04L25/0202Channel estimation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048Allocation of pilot signals, i.e. of signals known to the receiver

Abstract

This application discloses a kind of transmittings of multiaerial system and method for reseptance and device, this method comprises: the network equipment determines the first weight and the second weight used in precoding, wherein the first weight is different from the second weight.The network equipment sends data and reference signal to terminal device, wherein data carry out precoding using the first weight, reference signal carries out precoding using the second weight, the problem of interfering between UE, can solve using the above method, promote the demodulation performance of terminal device, thus lifting system capacity.

Description

A kind of transmitting of multiaerial system and method for reseptance and device

Technical field

This application involves wireless communication technology field, in particular to a kind of multiaerial system transmitting and method of reseptance and dress It sets.

Background technique

With the continuous evolution of communication system, long term evolution (long term evolution, LTE) system and future 5G system in the number of users that needs support be continuously increased, the demand to power system capacity is increasing, especially the business such as video Demand of the rise to downlink capacity it is especially pronounced.However, the frequency spectrum resource of system is limited, how to be provided in limited frequency spectrum Lifting system capacity becomes focus of attention as far as possible under source.

The network equipment in communication system (for example, base station) is equipped with mutiple antennas at present, and downlink transfer can be used more User wave beam shapes (Multi-user beamforming, MU-BF) technology, as shown in Figure 1, downlink data will be needed to transmit Multiple user equipmenies (user equipment, UE) (UE1~UE N as shown in figure 1) are as pairing UE, and base station is in identical time-frequency Data are transmitted to multiple UE of pairing simultaneously in resource, promote cell capacity to realize to reach without increase in bandwidth Purpose.But the interference between UE may be introduced using MU-BF technology, cause the data demodulation performance of UE to decline, influences system Capacity gain.

Summary of the invention

The embodiment of the present application provides a kind of transmitting of multiaerial system and method for reseptance and device, to solve in the prior art The problem of being interfered between existing UE.

In a first aspect, the embodiment of the present application provides a kind of multiaerial system launching technique, this method comprises:

The network equipment determines the first weight and the second weight used in precoding, wherein first weight with it is described Second weight is different;The network equipment sends data and reference signal to terminal device, wherein the data use described the One weight carries out precoding, and the reference signal carries out precoding using second weight.

Therefore, the network equipment is carried out precoding to data using the first weight and is carried out using the second weight to reference signal Precoding connects when terminal device can be made to receive signal using MRC receiver according to the channel of the reference signal estimation received It can not receive the data that the network equipment is sent to the terminal device of pairing, terminal device not will receive the terminal device of other pairings Interference can achieve the interference between complete inhibition terminal device, solve the problems, such as to interfere between UE existing in the prior art, The demodulation performance for promoting terminal device, thus lifting system capacity.

In a kind of possible design, first weight is the corresponding multi-user beam-forming MU- of the terminal device BF weight, second weight are the corresponding beam forming of single user SU-BF weight of the terminal device and the first matrix multiple Resulting weight;First matrix is for keeping the reception power of the data identical as the reception power of the reference signal.

In a kind of possible design, first weight be the corresponding MU-BF weight of the terminal device, described second Weight is the corresponding SU-BF weight of the terminal device;

The method also includes: the network equipment sends the first information to the terminal device;Wherein, first letter Breath is used to indicate the first matrix, and first matrix is used to make the reception function of the reception power and the reference signal of the data Rate is identical.

Therefore, because using above-mentioned first weight and the second weight, the reception power for the data that terminal device receives and The reception power of reference signal is not identical, therefore, it is necessary to indicate the first matrix to terminal device, so that terminal device needs basis The channel and the first matrix of reference signal estimation determine updated channel, to eliminate reception power and reference signal because of data Reception power it is not identical give terminal device demodulation data bring influence.

It should be noted that identical design is based on, other than the first matrix, in order to solve to interfere between terminal device Problem guarantees that terminal device can correctly solve adjusting data, can also design other kinds of matrix, the application does not limit this It is fixed.

In a kind of possible design, the method also includes: the network equipment sends second to the terminal device Information,

Wherein, second information is used to indicate the terminal device using described in the demodulation of maximum-ratio combing MRC receiver Data.

Therefore, because MRC receiver will not actively be adjusted the channel estimated according to reference signal, terminal device is matched It closes and uses MRC receiver solution adjusting data, can achieve the interference between complete inhibition terminal device, promote the demodulation of terminal device Performance, thus lifting system capacity.

Second aspect, the embodiment of the present application provide a kind of multiaerial system method of reseptance, this method comprises:

Terminal device receives reference signal and data from the network equipment, wherein the data are carried out pre- using the first weight Coding, the reference signal carry out precoding using the second weight, and first weight is different from second weight;The end End equipment demodulates the data using MRC receiver according to the channel that the reference signal is estimated.

Therefore, for any one with terminal device for terminal device of pairing, since the network equipment is to terminal device The reference signal of transmission is that corresponding second weight of using terminal equipment carries out the reference signal after precoding, and the network equipment to The data that the terminal device of pairing is sent are to carry out the data after precoding using corresponding first weight of terminal device of pairing, because This does not receive network when terminal device receives signal using MRC receiver according to the channel that the reference signal received is estimated Equipment is sent to the data of the terminal device of pairing, and terminal device not will receive the interference of the terminal device of other pairings, can be with Reach the interference between complete inhibition terminal device, solve the problems, such as to interfere between UE existing in the prior art, promotes terminal The demodulation performance of equipment, thus lifting system capacity.

In a kind of possible design, first weight be the corresponding MU-BF weight of the terminal device, described second Weight is the corresponding SU-BF weight of the terminal device and the resulting weight of the first matrix multiple;First matrix is for making The reception power of the data is identical as the reception power of the reference signal.

In a kind of possible design, first weight be the corresponding MU-BF weight of the terminal device, described second Weight is the corresponding SU-BF weight of the terminal device;

Before terminal device receives reference signal and data from the network equipment, the terminal device is from the network equipment The first information is received, the first information is used to indicate the first matrix, and first matrix is used to make the reception function of the data Rate is identical as the reception power of the reference signal;

In a kind of possible design, if first weight is the corresponding MU-BF weight of the terminal device, described the Two weights are the corresponding SU-BF weight of the terminal device, in the channel that the terminal device is estimated according to the reference signal When demodulating the data using MRC receiver, channel and described first that the terminal device is estimated according to the reference signal Matrix determines updated channel;The terminal device demodulates the number using MRC receiver according to the updated channel According to.

Therefore, terminal device can be eliminated because the reception power for receiving power and reference signal of data is not identical to terminal Equipment, which demodulates data bring, to be influenced.

In a kind of possible design, before terminal device receives reference signal and data from the network equipment, the end End equipment receives the second information from the network equipment, and second information is used to indicate the terminal device using the MRC Receiver demodulates the data.

Therefore, because MRC receiver will not actively be adjusted the channel estimated according to reference signal, terminal device is matched It closes and uses MRC receiver solution adjusting data, can achieve the interference between complete inhibition terminal device, promote the demodulation of terminal device Performance, thus lifting system capacity.

In addition, the network equipment can also notify terminal device to use MRC receiver solution adjusting data by implicit.Example Such as, terminal device can decide whether the terminal device for having with self pair, when terminal device determines presence and self pair Terminal device when, terminal device use MRC receiver solution adjusting data.

The third aspect, the embodiment of the present application provide a kind of multiaerial system emitter, which includes:

Processing unit, for determining the first weight and the second weight used in precoding, wherein first weight with Second weight is different;

Transmission unit, for sending data and reference signal to terminal device, wherein the data are weighed using described first Value carries out precoding, and the reference signal carries out precoding using second weight.

In a kind of possible design, first weight is the corresponding multi-user beam-forming MU- of the terminal device BF weight, second weight are the corresponding beam forming of single user SU-BF weight of the terminal device and the first matrix multiple Resulting weight;First matrix is for keeping the reception power of the data identical as the reception power of the reference signal.

In a kind of possible design, first weight be the corresponding MU-BF weight of the terminal device, described second Weight is the corresponding SU-BF weight of the terminal device;

The transmission unit, is also used to: Xiang Suoshu terminal device sends the first information;Wherein, the first information is used for Indicate that the first matrix, first matrix are used to make the reception power phase of the reception power and the reference signal of the data Together.

In a kind of possible design, the transmission unit is also used to: Xiang Suoshu terminal device sends the second information, In, second information is used to indicate the terminal device and demodulates the data using maximum-ratio combing MRC receiver.

Fourth aspect, the embodiment of the present application provide a kind of multiaerial system reception device, which includes:

Receiving unit, for receiving reference signal and data from the network equipment, wherein the data using the first weight into Row precoding, the reference signal carry out precoding using the second weight, and first weight is different from second weight;

Processing unit, the channel for being estimated according to the reference signal demodulate the data using MRC receiver.

In a kind of possible design, first weight be the corresponding MU-BF weight of the terminal device, described second Weight is the corresponding SU-BF weight of the terminal device and the resulting weight of the first matrix multiple;First matrix is for making The reception power of the data is identical as the reception power of the reference signal.

In a kind of possible design, first weight be the corresponding MU-BF weight of the terminal device, described second Weight is the corresponding SU-BF weight of the terminal device;

The receiving unit, is also used to:

Before receiving reference signal and data from the network equipment, the first information is received from the network equipment, described the One information is used to indicate the first matrix, and first matrix is for making the reception power of the data and connecing for the reference signal It is identical to receive power;

In a kind of possible design, if first weight is the corresponding MU-BF weight of the terminal device, described the Two weights are the corresponding SU-BF weight of the terminal device, and the processing unit is specifically used for:

Updated channel is determined according to the channel of reference signal estimation and first matrix;

The data are demodulated using MRC receiver according to the updated channel.

In a kind of possible design, the receiving unit is also used to:

Before receiving reference signal and data from the network equipment, the second information is received from the network equipment, described the Two information are used to indicate described device and demodulate the data using the MRC receiver.

5th aspect, the embodiment of the present application provide a kind of multiaerial system sending device, described device include processor and Storage medium, the storage medium is stored with instruction, when described instruction is run by the processor, so that the processor executes The method of the possible design of any one in first aspect or first aspect.

6th aspect, the embodiment of the present application provide a kind of multiaerial system reception device, described device include processor and Storage medium, the storage medium is stored with instruction, when described instruction is run by the processor, so that the processor executes The method of the possible design of any one in second aspect or second aspect.

7th aspect, the embodiment of the present application provide a kind of network equipment, the network equipment include transceiver, processor and Memory: the memory is for storing computer program;The processor calls the computer program of the memory storage, The method for executing any possible design in first aspect or first aspect by the transceiver.

Eighth aspect, the embodiment of the present application provide a kind of terminal device, the terminal device include transceiver, processor and Memory: the memory is for storing computer program;The processor calls the computer program of the memory storage, The method for executing any possible design in second aspect or second aspect by the transceiver.

9th aspect, the embodiment of the present application also provide a kind of computer readable storage medium, the computer-readable storage medium Matter is stored with computer program, when the computer program is run on computers, so that computer executes above-mentioned various aspects institute The method stated.

Tenth aspect, the embodiment of the present application also provides a kind of computer program product comprising program, when it is in computer When upper operation, so that computer executes method described in above-mentioned various aspects.

Tenth on the one hand, and the embodiment of the present application also provides a kind of network system, which includes above-mentioned 7th aspect Terminal device described in the network equipment and above-mentioned eighth aspect.

Detailed description of the invention

Fig. 1 is the signal that the network equipment sends data based on MU-BF technology to multiple terminal devices in the embodiment of the present application Figure;

Fig. 2 is the process that the network equipment sends data based on MU-BF technology to multiple terminal devices in the embodiment of the present application Figure;

Fig. 3 is the coding flow diagram of LTE in the embodiment of the present application;

Fig. 4 is the general introduction flow chart of multiaerial system transmitting and method of reseptance in the embodiment of the present application;

Fig. 5 is the flow chart for sending data in the embodiment of the present application to multiple terminal devices based on MU-BF technology;

Fig. 6 is the structural schematic diagram of multiaerial system emitter in the embodiment of the present application;

Fig. 7 is the structural schematic diagram of multiaerial system reception device in the embodiment of the present application;

Fig. 8 is the structural schematic diagram of the network equipment in the embodiment of the present application;

Fig. 9 is the structural schematic diagram of terminal device in the embodiment of the present application.

Specific embodiment

With reference to the accompanying drawing, embodiments herein is described.

The embodiment of the present application, which is applied to the network equipment and terminal device, all has the time division duplex (time of multiple antennas Division duplex, TDD) radio honeycomb communication system.

Network element involved in the embodiment of the present application includes the network equipment and terminal device.

Wherein, a specific implementation form of the network equipment as access network (access network, AN), can be with Referred to as access node is if it is the form of wireless access, referred to as wireless access network (radio access network, RAN) Terminal device provides wirelessly access.Access node specifically can be global mobile communication (global system for Mobile communication, GSM) system or CDMA (code division multiple access, CDMA) system Base station in system is also possible to wideband code division multiple access (wideband code division multiple access, WCDMA) Base station (NodeB) in system, can also be in LTE system evolved base station (evolutional node B, eNB or ENodeB) or the base station equipment in 5G network, small base station equipment, wireless access node (WiFi AP), wireless intercommunication are micro- Wave access base station (worldwide interoperability for microwave access base station, WiMAX BS) etc., the application does not limit this.

Terminal device can be wireless terminal or catv terminal.Wherein, wireless terminal can be directed to user and provide language The equipment of sound and/or data connectivity has the handheld device of wireless connecting function or is connected to radio modem Other processing equipments.Wireless terminal can be through wireless access network (radio access network, RAN) and at least one core Net is communicated, and wireless terminal can be mobile terminal, such as mobile phone (or being " honeycomb " phone) and with mobile terminal Computer, for example, it may be portable, pocket, hand-held, built-in computer or vehicle-mounted mobile device, they Language and/or data are exchanged with wireless access network.For example, personal communication service (personal communication Service, PCS) phone, wireless phone, Session initiation Protocol (session initiation protocol, SIP) phone, Wireless local loop (wireless local loop, WLL) stands, personal digital assistant (personal digital Assistant, PDA) etc. equipment.Wireless terminal is referred to as system, subscriber unit (subscriber unit, SU), subscriber Stand (subscriber station, SS), movement station (mobile station, MB), mobile station (mobile), distant station (remote station, RS), access point (access point, AP), remote terminal (remote terminal, RT), access Terminal (access terminal, AT), user terminal (user terminal, UT), user agent (user agent, UA), Or user equipment (user equipment, UE).

The network equipment in the prior art is shown refering to Fig. 2, and data are sent to multiple terminal devices based on MU-BF technology Flow chart.

Step 201: the network equipment determines N number of terminal device.

N is positive integer, and above-mentioned N number of terminal device refers to the terminal device of pairing, specifically, the network equipment is according to administrative model Enclose the letter that the detection reference signal (Sounding Reference Signal, SRS) that interior each terminal device is sent respectively obtains Road estimated result determines the terminal device of the pairing in each terminal device.The network equipment, can for the terminal device of pairing To send corresponding data and reference signal respectively to these terminal devices on identical running time-frequency resource.

For example, 10 UE send SRS to base station respectively, and base station is according to 10 received within certain scheduled time SRS carries out channel estimation respectively, and the channel of preset condition will be wherein met based on the corresponding channel estimation results of 10 SRS UE of the UE corresponding to estimated result as pairing.For example, the UE using channel relevancy lower than pre-determined threshold is as the UE of pairing.

Step 202: the network equipment calculates the corresponding beam forming of single user of each terminal device in N number of terminal device (single-use beamforming, SU-BF) weight.

Wherein, the dimension of SU-BF weight is the transmitting antenna number of the network equipment multiplied by the data fluxion of terminal device.It calculates The algorithm of SU-BF weight includes but is not limited to feature wave-beam shaping (eigen-beamforming, EBF), maximum ratio transmission (maximum ratio transmission, MRT) etc..The network equipment can calculate each end using any one of the above algorithm End equipment corresponds to SU-BF weight.

Step 203: network equipment SU-BF weight corresponding to N number of terminal device carries out united orthogonal and handles To the corresponding multi-user beam-forming of each terminal device (multi-user beamforming, MU-BF) weight.

Wherein, the orthogonalization algorithm for calculating MU-BF weight includes but is not limited to force zero (Zero Forcing, ZF), signal With leakage and the power ratio (Signal to leakage and noise ratio, SLNR) of noise, Block Diagonalization (Block Diagonalization, BD) etc..The network equipment can calculate each terminal device using any one of the above orthogonalization algorithm Corresponding MU-BF weight.

Step 204: the network equipment sends corresponding data and ginseng to N number of terminal device on identical running time-frequency resource respectively Examine signal.

By taking k-th of terminal device as an example, it is corresponding using k-th of terminal device for being sent to the data of k-th of terminal device MU-BF weight to need to be sent to k-th of terminal device data carry out precoding after data, be sent to k-th of terminal The reference signal of equipment is using the corresponding MU-BF weight of k-th of terminal device to the ginseng for needing to be sent to k-th of terminal device It examines signal and carries out the reference signal after precoding.Wherein, k-th of terminal device is any one in above-mentioned N number of terminal device Terminal device, k are positive integer.

Specifically, by taking LTE shown in Fig. 3 encodes process as an example, number from the network equipment to k-th of terminal device that sent for According to and reference signal, bit stream is encoded by scrambling code first, bit stream is mapped as by symbol stream by modulation mapping, is connect , it is mapped by layer and symbol stream is mapped as data flow, then execute pre-encode operation shown in Fig. 3 virtual box, i.e., by data Stream is multiplied by the corresponding MU-BF weight of k-th of terminal device, finally, generating two mistakes by resource unit mapping and OFDM symbol Data flow after precoding is generated as OFDM symbol, is launched by antenna port by journey.It should be understood that the application is only It is illustrated so that LTE encodes process as an example, can also be that the coding process of future communication systems, the application are not construed as limiting this.

As can seen above, the network equipment is before sending data and reference signal etc. to terminal device, need to the data and Reference signal carries out the operation for needing to encode.

Reference signal involved in the embodiment of the present application is demodulated reference signal (demodulation reference Signal, DMRS).

It should be understood that being illustrated by taking a terminal device in multiple terminal devices as an example in Fig. 2, multiple terminals are set Other terminal devices in standby carry out communicating the process that can refer to the terminal device and communicated with the network equipment with the network equipment.

Step 205: terminal device is demodulated according to itself configuration selective receiver from the received data of the network equipment.

Specifically, each terminal device can configure selective receiver according to itself, for example, can choose maximum-ratio combing (maximal ratio combining, MRC) receiver, interference rejection combination (Interference Rejection Combining, IRC) receiver, maximum likelihood detector (Maximum Likelihood Detector, MLD) receiver, string (Successive Interference Cancellation, SIC) receiver etc., specific each terminal device are eliminated in row interference The specific algorithm for selecting what type of receiver to depend on the terminal device is realized.

But as shown in Figure 2, existing algorithm SU-BF weight corresponding to N number of terminal device carries out united orthogonal Processing obtains MU-BF weight, when the data fluxion of terminal device is less than the receiving antenna number of terminal device, at united orthogonal The dimension of channel space after reason is less than channel dimensions, will have the channel space of non-orthogonalization, these are not orthogonalized Space can introduce the interference of other terminal devices when the terminal device receives signal from the network equipment, lead to the terminal device Data demodulation performance loss, influence capacity gain.Particularly, when the terminal device number of pairing is more, terminal device it Between interference problem it is more significant.

As shown in fig.4, the embodiment of the present application provides a kind of transmitting of multiaerial system and method for reseptance, it is above-mentioned to solve Interference problem in scheme between UE.This method comprises:

The network equipment can determine the terminal device of pairing first, specifically may refer to step 201, and it is no longer superfluous to repeat place It states.The following contents by taking the network equipment is communicated with any one terminal device in the terminal device of above-mentioned pairing as an example into Row explanation.

Step 400: the network equipment determines the first weight and the second weight used in precoding, wherein the first weight with Second weight is different.

In the first possible implementation, the first weight is the corresponding MU-BF weight of terminal device, and the second weight is The corresponding SU-BF weight of terminal device and the resulting weight of the first matrix multiple.First matrix makes the reception power and ginseng of data The reception power for examining signal is identical.

Wherein, the corresponding SU-BF weight of terminal device can be determined using EBF or MRT scheduling algorithm.

The corresponding MU-BF weight of terminal device is joined according to the corresponding SU-BF weight of terminal device of pairing It closes what orthogonalization process obtained, can specifically use ZF or SLNR or BD scheduling algorithm.

It should be understood that above-mentioned various algorithms are only for example, not as the restriction of the embodiment of the present application.

Wherein, the reception power of data, which refers to, removes the signal after interference and noise in data that terminal device receives Power.The reception power of reference signal, which refers to, removes the signal after interference and noise in reference signal that terminal device receives Power.The reception power of data is identical as the reception power of reference signal when referring to that terminal device is demodulated using receiver, The reception power of data is consistent with the reception power of reference signal, demodulates data correctly.Wherein, the first matrix can claim again For power compensation matrix.

It is removed it should be understood that reception power signified in the embodiment of the present application is each meant in signal that receiver receives The data flow after interference and noise is removed in the data flow that the power or receiver of signal after interference and noise receive Power.

In a kind of possible design, if the corresponding MU-BF weight of terminal device is the end using ZF algorithm according to pairing The corresponding SU-BF weight of end equipment carries out what united orthogonal was handled, and the first matrix is a diagonal matrix, the first square The dimension of battle array is the data fluxion of terminal device multiplied by the data fluxion of terminal device.The corresponding data flow of each diagonal element The power compensation factor, the power compensation factor of each data flow is when carrying out precoding to the data flow using MU-BF weight Data flow data flow when the reception power of terminal equipment side is with data flow progress precoding corresponding using SU-BF weight In the ratio of the reception power of terminal equipment side.Wherein, the network equipment can determine the function of each data flow according to existing algorithm Rate compensation factor, the application are not construed as limiting this.Therefore, to a data flow using corresponding SU-BF weight and the data flow The resulting weight of power compensation fac-tor to the data flow carry out precoding when, reception of the data flow in terminal equipment side Power, when with carrying out precoding to the data flow using corresponding MU-BF weight to this data flow, which sets in terminal The reception power of standby side is equal.

From the foregoing, it will be observed that the data for needing to be sent to terminal device are carried out precoding using MU-BF weight, will need to send Precoding is carried out using SU-BF weight and the resulting weight of the first matrix multiple to the reference signal of terminal device, can make to count According to reception power it is identical as the reception power of reference signal.

In addition, if the corresponding MU-BF weight of terminal device is the end using other algorithms in addition to ZF algorithm according to pairing The corresponding SU-BF weight of end equipment carries out what united orthogonal was handled, and the first matrix is not a diagonal matrix, is based on Above-mentioned identical principle can also obtain corresponding first matrix according to corresponding algorithm, and details are not described herein by the application.

In the second possible implementation, the first weight is the corresponding MU-BF weight of terminal device, and the second weight is The corresponding SU-BF weight of terminal device.At this point, the network equipment also needs to send the first information to terminal device;Wherein, the first information It is used to indicate the first matrix, the first matrix is for keeping the reception power of data identical as the reception power of reference signal.

The first signified matrix and meaning in the first possible implementation in the second possible implementation The first matrix it is identical, overlaps will not be repeated.

The first possible implementation and second of possible implementation the difference is that, when the network equipment is adopted When sending data and reference signal with the first weight of the first possible implementation kind and the second weight, terminal device is received The reception power of the data arrived is identical as the reception power of reference signal, the letter that terminal device can directly be estimated according to reference signal Road uses MRC receiver solution adjusting data.And when the network equipment uses the first weight and second of second of possible implementation Weight sends data and when reference signal, and the reception power for receiving power and reference signal for the data that terminal device receives is not Identical, terminal device needs the channel estimated according to reference signal and the first matrix to determine updated channel, to eliminate factor According to the reception power for receiving power and reference signal it is not identical influenced to terminal device demodulation data bring, then, terminal Equipment uses MRC receiver solution adjusting data according to updated channel.

It should be noted that identical design is based on, other than the first matrix, in order to solve to interfere between terminal device Problem guarantees that terminal device can correctly solve adjusting data, can also design other kinds of matrix, the application does not limit this It is fixed.

Step 410: the network equipment sends data and reference signal to terminal device, wherein data are using the first weight Data after carrying out precoding, reference signal are that the reference signal after precoding is carried out using the second weight.

It should be understood that the network equipment on identical running time-frequency resource to the terminal device of pairing send corresponding data and Reference signal.Therefore, the network equipment needs each terminal device in the terminal device for pairing to execute 400 He of above-mentioned steps Step 410.

In addition, the network equipment sends the second information to terminal device, wherein the second information in a kind of possible design Terminal device is used to indicate using MRC receiver solution adjusting data.

For example, the network equipment can send Downlink Control Information (Downlink Control to terminal device Information, DCI), it include the second information in DCI, the second information occupies 1bit.For example, MuBf mode (MuBfMode)= 0 indicates that terminal device configures selective receiver according to itself, i.e. the network equipment does not use launch party provided by the embodiments of the present application Normal direction terminal device sends data and reference signal, and MuBfMode=1 indicates that terminal device uses MRC receiver solution adjusting data, I.e. the network equipment sends data and reference signal to terminal device using launching technique provided by the embodiments of the present application.

MRC receiver solution adjusting data is used except through the second information instruction terminal equipment, the network equipment can also pass through Implicit notifies terminal device to use MRC receiver solution adjusting data.For example, terminal device can decide whether to exist and itself The terminal device of pairing, when terminal device, which determines, there is the terminal device with self pair, terminal device uses MRC receiver Solve adjusting data.

It should be understood that terminal device can also be using the receiver with similar functions, this Shen in addition to MRC receiver Please embodiment do not limit terminal device and can only use MRC receiver.

Step 420: terminal device receives reference signal from the network equipment and data, terminal device are estimated according to reference signal Channel use MRC receiver solution adjusting data.

It should be understood that for any one is with the terminal device of terminal device pairing, the corresponding MU- of terminal device BF weight SU-BF weight corresponding with the terminal device of pairing is orthogonal, meanwhile, the corresponding SU_BF weight of terminal device and pairing The corresponding MU-BF weight of terminal device it is orthogonal.Due to the network equipment to the reference signal that terminal device is sent be using SU_BF Weight or the resulting weight of SU-BF weight and the first matrix multiple carry out the reference signal after precoding, and the network equipment to The data that the terminal device of pairing is sent are to carry out the number after precoding using the corresponding MU-BF weight of terminal device of pairing According to therefore, when terminal device receives signal using MRC receiver according to the channel that the reference signal received is estimated, reception is not The data of the terminal device of pairing are sent to the network equipment, terminal device not will receive the dry of the terminal device of other pairings It disturbs, can achieve the interference between complete inhibition terminal device, promote the demodulation performance of terminal device, so that lifting system is held Amount.

Embodiment as shown in Figure 4 is specifically described below with reference to specific example.

Base station determines UE1 and UE2 is that two UE, UE1 and UE2 matched have 4 receiving antennas, and base station (has 4 Transmitting antenna) give each UE 2 data flows of transmission.Being illustrated in figure 5 the 4x4 of UE1, (transmitting antenna number of base station is multiplied by UE1's Receiving antenna number) channel matrix singular value decomposition (Singular value decomposition, SVD) decompose.

Wherein, SVD is decomposed, i.e. singular value decomposition, i.e., the matrix H of a m × n is decomposed into H=U Σ VH.Wherein U is m × m rank unitary matrice;Σ is m × n rank nonnegative real number diagonal matrix;VH, the i.e. conjugate transposition of V are n × n rank unitary matrice.It is such Decompose the singular value decomposition for being referred to as M.Element λ i on Σ diagonal line is the singular value of M, and singular value minispread by big, λ 0 is maximum.Each column vector in V is the right singular vector of H, the left singular vector that each column vector in U is H.

Specifically, U is 4 × 4 rank unitary matrice as shown in figure 5, H is 4 × 4 channel matrixes of UE1;Σ is that 4 × 4 ranks are non-negative Real number diagonal matrix;V is 4 × 4 rank unitary matrice, v0, v1, and 4 right singular vectors that v2 and v3 are H respectively correspond singular value λ 0, λ 1, λ 2, λ 3;Likewise, u0, u1, u2, u3 are 4 left singular vectors of H, singular value λ 0, λ 1, λ 2, λ 3 are respectively corresponded.Its In, the SU-BF weight of UE1 is matrix [v0, v1], and wherein it is corresponding with time big singular value to respectively indicate maximum singular value by v0 and v1 Right singular vector;V0 and v1 has only been subjected to ZF united orthogonal when MU-BF weight computing, and v2 does not carry out ZF with v3 and combines just Friendshipization interferes UE1 so that the signal of UE2 can enter the reception signal of UE1 from the channel space of v2 and v3, but such as Fruit only receives in the space [u0, u1] corresponding with urgent zero direction, i.e. UE1 uses the conjugate transposition of [u0, u1] multiplied by the reception of UE1 Signal receive balanced, then interference of the signal without UE2 after can achieve equilibrium.It and is use in the DMRS that UE1 is received When second weight carries out the DMRS after precoding, the channel that UE1 estimate according to DMRS is [u0, u1], UE1 use estimating at this time Meter channel carries out receiving the balanced interference that can reach no UE2.

Based on above embodiments, the embodiment of the present application provides a kind of multiaerial system emitter, as shown in fig.6, should Device 600 includes:

Processing unit 601, for determining the first weight and the second weight used in precoding, wherein first power It is worth different from second weight;

Transmission unit 602, for sending data and reference signal to terminal device, wherein the data are using described First weight carries out the data after precoding, and the reference signal is to carry out the reference after precoding using second weight to believe Number.

In a kind of possible design, first weight is the corresponding multi-user beam-forming MU- of the terminal device BF weight, second weight are the corresponding beam forming of single user SU-BF weight of the terminal device and the first matrix multiple Resulting weight;First matrix is for keeping the reception power of the data identical as the reception power of the reference signal.

In a kind of possible design, first weight be the corresponding MU-BF weight of the terminal device, described second Weight is the corresponding SU-BF weight of the terminal device;

The transmission unit 602, is also used to: Xiang Suoshu terminal device sends the first information;

Wherein, the first information is used to indicate the first matrix, and first matrix is used to make the reception function of the data Rate is identical as the reception power of the reference signal.

In a kind of possible design, the transmission unit 602 is also used to: Xiang Suoshu terminal device sends the second information, Wherein, second information is used to indicate the terminal device and demodulates the data using maximum-ratio combing MRC receiver.

Based on above embodiments, the embodiment of the present application provides a kind of multiaerial system reception device, as shown in fig.7, should Device 700 includes:

Receiving unit 701, for receiving reference signal and data from the network equipment, wherein the data are using first Weight carries out the data after precoding, and the reference signal is that the reference signal after precoding is carried out using the second weight, described First weight is different from second weight;

Processing unit 702, the channel for being estimated according to the reference signal demodulate the data using MRC receiver.

In a kind of possible design, the receiving unit 701 is also used to:

Before receiving reference signal and data from the network equipment, the first information is received from the network equipment, described the One information is used to indicate the first matrix, and first matrix is for making the reception power of the data and connecing for the reference signal It is identical to receive power;

The processing unit 702, is specifically used for:

Updated channel is determined according to the channel of reference signal estimation and first matrix;

The data are demodulated using MRC receiver according to the updated channel.

In a kind of possible design, the receiving unit 701 is also used to: from the network equipment receive reference signal and Before data, the second information is received from the network equipment, second information is used to indicate described device and is connect using the MRC Receipts machine demodulates the data.

It should be understood that above each unit division be only a kind of logic function division, in actual implementation can all or It is partially integrated on a physical entity, it can also be physically separate.And these units all can pass through processing elements with software The form that part calls is realized;It can also all realize in the form of hardware;Processing element can be passed through with software with unit The form of calling realizes that unit is realized in the form of hardware.During realization, each step of the above method or more than it is each A unit can be completed by the integrated logic circuit of the hardware in processor elements or the instruction of software form.

For example, the above unit can be arranged to implement one or more integrated circuits of above method, such as: One or more specific integrated circuits (Application Specific Integrated Circuit, ASIC), or, one Or multi-microprocessor (digital signal processor, DSP), or, one or more field programmable gate array (Field Programmable Gate Array, FPGA) etc..For another example, when some above unit dispatches journey by processing element When the form of sequence is realized, which can be general processor, such as central processing unit (Central Processing Unit, CPU) or it is other can be with the processor of caller.For another example, these units can integrate together, with system on chip The form of (system-on-a-chip, SOC) is realized.

Based on above embodiments, the embodiment of the present application also provides a kind of network equipments, as shown in fig.8, the network It include: transceiver 801, processor 802, memory 803 in equipment 800.Wherein, memory 803 is for storing computer program; The computer program that processor 802 calls memory 803 to store, executes above-mentioned method as shown in Figure 3 by transceiver 801.

It should be understood that the device in above-mentioned embodiment illustrated in fig. 6 can be realized with the network equipment 800 shown in Fig. 8.Tool Body, transmission unit 601 can be realized by transceiver 801, and processing unit 602 can be realized by processor 802.The network equipment 800 structure does not constitute the restriction to the embodiment of the present application.

Based on above embodiments, the embodiment of the present application also provides a kind of terminal devices, as shown in fig.9, the terminal It include: transceiver 901, processor 902, memory 903 in equipment 900.Wherein, memory 903 is for storing computer program; The computer program that processor 902 calls memory 903 to store, executes above-mentioned method as shown in Figure 3 by transceiver 901.

It should be understood that the device in above-mentioned embodiment illustrated in fig. 7 can be realized with terminal device 900 shown in Fig. 9.Tool Body, processing unit 702 can be realized by processor 902, and receiving unit 701 can be realized by transceiver 901.Terminal device 900 structure does not constitute the restriction to the embodiment of the present application.

In figs. 8 and 9, processor can be CPU, network processing unit (network processor, NP), hardware core Piece or any combination thereof.Memory may include volatile memory (volatile memory), such as random access memory Device (random access memory, RAM);Memory also may include nonvolatile memory (non-volatile Memory), such as read-only memory (read-only memory, ROM), flash memory (flash memory), hard disk (hard disk drive, HDD) or solid state hard disk (solid-state drive, SSD);Memory can also include above-mentioned kind The combination of the memory of class.

In conclusion determining the first weight used in precoding using the method network equipment provided by the embodiments of the present application With the second weight, wherein the first weight is different from the second weight.The network equipment sends data and reference signal to terminal device, Wherein, data are that the data after precoding are carried out using the first weight, and reference signal is after carrying out precoding using the second weight Reference signal.For any one is with the terminal device of terminal device pairing, since the network equipment is sent out to terminal device The reference signal sent is that corresponding second weight of using terminal equipment carries out the reference signal after precoding, and the network equipment is to matching Pair the data that send of terminal device be to carry out the data after precoding using corresponding first weight of terminal device of pairing, because This does not receive network when terminal device receives signal using MRC receiver according to the channel that the reference signal received is estimated Equipment is sent to the data of the terminal device of pairing, and terminal device not will receive the interference of the terminal device of other pairings, can be with Reach the interference between complete inhibition terminal device, solve the problems, such as to interfere between UE existing in the prior art, promotes terminal The demodulation performance of equipment, thus lifting system capacity.

It should be understood by those skilled in the art that, the embodiment of the present application can provide as the production of method, system or computer program Product.Therefore, in terms of the embodiment of the present application can be used complete hardware embodiment, complete software embodiment or combine software and hardware Embodiment form.Moreover, it wherein includes computer available programs generation that the embodiment of the present application, which can be used in one or more, The meter implemented in the computer-usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) of code The form of calculation machine program product.

The embodiment of the present application is referring to the method, equipment (system) and computer program product according to the embodiment of the present application Flowchart and/or the block diagram describe.It should be understood that can be realized by computer program instructions in flowchart and/or the block diagram The combination of process and/or box in each flow and/or block and flowchart and/or the block diagram.It can provide these calculating Processing of the machine program instruction to general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices Device is to generate a machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute For realizing the function of being specified in one or more flows of the flowchart and/or one or more blocks of the block diagram Device.

These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates, Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or The function of being specified in multiple boxes.

These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one The step of function of being specified in a box or multiple boxes.

Obviously, those skilled in the art can carry out various modification and variations without departing from this Shen to the embodiment of the present application Spirit and scope please.In this way, if these modifications and variations of the embodiment of the present application belong to the claim of this application and its wait Within the scope of technology, then the application is also intended to include these modifications and variations.

Claims (21)

1. a kind of multiaerial system launching technique, which is characterized in that this method comprises:
The network equipment determines the first weight and the second weight used in precoding, wherein first weight and described second Weight is different;
The network equipment sends data and reference signal to terminal device, wherein the data using first weight into Row precoding, the reference signal carry out precoding using second weight.
2. the method as described in claim 1, which is characterized in that first weight is the corresponding multi-user of the terminal device Beam forming MU-BF weight, second weight are the corresponding beam forming of single user SU-BF weight of the terminal device and the The resulting weight of one matrix multiple;First matrix is used to make the reception of the reception power and the reference signal of the data Power is identical.
3. the method as described in claim 1, which is characterized in that first weight is the corresponding MU-BF of the terminal device Weight, second weight are the corresponding SU-BF weight of the terminal device;
The method also includes:
The network equipment sends the first information to the terminal device;
Wherein, the first information is used to indicate the first matrix, first matrix be used to making the reception power of the data with The reception power of the reference signal is identical.
4. the method according to claim 1, which is characterized in that the method also includes:
The network equipment sends the second information to the terminal device, wherein second information is used to indicate the terminal Equipment demodulates the data using maximum-ratio combing MRC receiver.
5. a kind of multiaerial system method of reseptance, which is characterized in that this method comprises:
Terminal device receives reference signal and data from the network equipment, wherein and the data carry out precoding using the first weight, The reference signal carries out precoding using the second weight, and first weight is different from second weight;
The terminal device demodulates the data using MRC receiver according to the channel that the reference signal is estimated.
6. method as claimed in claim 5, which is characterized in that first weight is the corresponding MU-BF of the terminal device Weight, second weight are the corresponding SU-BF weight of the terminal device and the resulting weight of the first matrix multiple;Described One matrix is for keeping the reception power of the data identical as the reception power of the reference signal.
7. method as claimed in claim 5, which is characterized in that first weight is the corresponding MU-BF of the terminal device Weight, second weight are the corresponding SU-BF weight of the terminal device;
Before terminal device receives reference signal and data from the network equipment, further includes:
The terminal device receives the first information from the network equipment, and the first information is used to indicate the first matrix, described First matrix is for keeping the reception power of the data identical as the reception power of the reference signal.
8. the method for claim 7, which is characterized in that the channel that the terminal device is estimated according to the reference signal The data are demodulated using MRC receiver, comprising:
The channel and first matrix that the terminal device is estimated according to the reference signal determine updated channel;
The terminal device demodulates the data using MRC receiver according to the updated channel.
9. such as the described in any item methods of claim 5-8, which is characterized in that received from the network equipment with reference to letter in terminal device Number and data before, further includes:
The terminal device receives the second information from the network equipment, and second information is used to indicate the terminal device and adopts The data are demodulated with the MRC receiver.
10. a kind of multiaerial system emitter, which is characterized in that the device includes:
Processing unit, for determining the first weight and the second weight used in precoding, wherein first weight with it is described Second weight is different;
Transmission unit, for sending data and reference signal to terminal device, wherein the data using first weight into Row precoding, the reference signal carry out precoding using second weight.
11. device as claimed in claim 10, which is characterized in that first weight is that the terminal device is corresponding multi-purpose Family beam forming MU-BF weight, second weight be the corresponding beam forming of single user SU-BF weight of the terminal device with The resulting weight of first matrix multiple;First matrix is for making the reception power of the data and connecing for the reference signal It is identical to receive power.
12. device as claimed in claim 10, which is characterized in that first weight is the corresponding MU- of the terminal device BF weight, second weight are the corresponding SU-BF weight of the terminal device;
The transmission unit, is also used to: Xiang Suoshu terminal device sends the first information;
Wherein, the first information is used to indicate the first matrix, first matrix be used to making the reception power of the data with The reception power of the reference signal is identical.
13. such as the described in any item devices of claim 10-12, which is characterized in that the transmission unit is also used to:
The second information is sent to the terminal device, wherein second information is used to indicate the terminal device using maximum The data are demodulated than merging MRC receiver.
14. a kind of multiaerial system reception device, which is characterized in that the device includes:
Receiving unit, for receiving reference signal and data from the network equipment, wherein the data are carried out pre- using the first weight Coding, the reference signal carry out precoding using the second weight, and first weight is different from second weight;
Processing unit, the channel for being estimated according to the reference signal demodulate the data using MRC receiver.
15. method as claimed in claim 14, which is characterized in that first weight is the corresponding MU- of the terminal device BF weight, second weight are the corresponding SU-BF weight of the terminal device and the resulting weight of the first matrix multiple;It is described First matrix is for keeping the reception power of the data identical as the reception power of the reference signal.
16. method as claimed in claim 14, which is characterized in that first weight is the corresponding MU- of the terminal device BF weight, second weight are the corresponding SU-BF weight of the terminal device;
The receiving unit, is also used to:
Before receiving reference signal and data from the network equipment, the first information, first letter are received from the network equipment Breath is used to indicate the first matrix, and first matrix is used to make the reception function of the reception power and the reference signal of the data Rate is identical.
17. device as claimed in claim 16, which is characterized in that the processing unit is specifically used for:
Updated channel is determined according to the channel of reference signal estimation and first matrix;
The data are demodulated using MRC receiver according to the updated channel.
18. such as the described in any item devices of claim 14-17, which is characterized in that the receiving unit is also used to:
Before receiving reference signal and data from the network equipment, the second information, second letter are received from the network equipment Breath is used to indicate described device and demodulates the data using the MRC receiver.
19. a kind of computer storage medium, is stored with computer executable instructions, when the computer executable instructions are communicating When being run in equipment, so that the communication equipment is executed such as claim 1 to the described in any item methods of claim 9.
20. a kind of multiaerial system sending device, which is characterized in that described device includes pocessor and storage media, described to deposit Storage media is stored with instruction, when described instruction is run by the processor, so that the processor executes according to claim 1 extremely The described in any item methods of claim 4.
21. a kind of multiaerial system reception device, which is characterized in that described device includes pocessor and storage media, described to deposit Storage media is stored with instruction, when described instruction is run by the processor so that the processor execute according to claim 5 to The described in any item methods of claim 9.
CN201810355732.0A 2018-04-19 Method and device for transmitting and receiving multi-antenna system CN110391825B (en)

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