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Antenna selection method and device

An antenna selection and antenna technology, applied in the field of communication, can solve the problems of increasing the complexity of receiving and processing, and achieve the effect of reducing performance loss and avoiding adjacent cell interference.

Active Publication Date: 2020-05-19
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the traditional MIMO system, M-MIMO introduces a large number of antennas, which leads to a significant increase in the complexity of receiving and processing at the base station (Base Station, BS)

Method used

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  • Antenna selection method and device
  • Antenna selection method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Embodiment 1, a BS-side dimension selection scheme that can suppress interference.

[0068] The solution provided by the embodiment of the present application adds an interference component identification module, see figure 2 , the functions of the interference component identification module include:

[0069] Pass the identified interference components to the dimension selection module, and the dimension selection module selects M components from the remaining components after removing the interference components.

[0070] Wherein, the input of the interference component identification module is the dimension-reduced uplink DMRS pilot signal or the SRS pilot signal, or other signals during specific implementation, and the output of the interference component identification module is the identified interference component index.

Embodiment 2

[0072] Embodiment 2, algorithm 1 for identifying interference.

[0073] Step 1, measure the equivalent interference channel of the adjacent cell according to the DMRS signal:

[0074] When estimating the user's uplink channel H k At the same time, the adjacent cell interference channel H is estimated I ,Methods as below:

[0075]

[0076] Among them, K is the number of uplink MU users, H I is the 1×M interference channel, M is the number of BS antennas after dimensionality reduction, H k is the DMRS estimated channel of the kth MU user, H LS =Y*conj(S), Y represents the received signal vector, S represents the pilot sequence, conj represents the conjugation, * represents the multiplication of corresponding elements;

[0077] Step 2, calculate the interference power:

[0078] P i =|H I (:,i)| 2 ,i=1,2,...,M

[0079] Step 3, identify the interference component:

[0080] if Then the i-th component is the interference component. in, is the measured noise power, ...

Embodiment 3

[0091]Embodiment 3, algorithm 2 for identifying interference.

[0092] Step 1, measure the equivalent channel of adjacent cell interference according to the SRS signal:

[0093] When estimating the SRS channel of the UE, the adjacent cell interference channel suffered by the UE is also estimated, and the specific formula is as follows:

[0094] h UEi,i =H Ls -H UEi,SRS

[0095] Among them, H UEi,i is the interference channel of the i-th UE, H Ls =Y*conj(S) represents the estimated channel after removing the pilot sequence, the number of antennas is 1×N, Y represents the SRS received signal vector, S represents the SRS pilot sequence, H UEi,SRS is the SRS estimated channel of the i-th UE;

[0096] Step 2, calculate SIR:

[0097] For a certain subband, combine the channels of N MU UEs sharing this subband into H srs , the specific formula of the physical resource block (Physical Resource Block, PRB) occupied by a certain multi-user antenna (MU-MIMO) user group is as fol...

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Abstract

The invention discloses an antenna selection method and an antenna selection device, which are used for avoiding adjacent cell interference in base station BS end antenna selection and reducing a performance loss after antenna dimension reduction. The antenna selection method provided by the invention comprises the following steps: identifying an interference antenna and determining an antenna subjected to dimension reduction processing from the remaining antennas after the interference antenna is excluded from the alternative antennas.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular to a method and device for selecting an antenna. Background technique [0002] Massive MIMO, referred to as M-MIMO, is an important feature of 5G. It means deploying a large number of antennas on the BS side, such as 64 antennas, 128 antennas, or even 256 antennas. Compared with the traditional MIMO system, M-MIMO introduces a large number of antennas, which leads to a significant increase in the complexity of reception processing at the base station (Base Station, BS). Therefore, various equipment manufacturers have introduced dimensionality reduction solutions to reduce the complexity of the BS side, which involves how to choose the appropriate dimension, that is, the final equivalent antenna, to achieve the goal of reducing complexity while maintaining appropriate performance. [0003] Existing dimension selection schemes such as figure 1 As shown, where ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/08H04B17/336H04B7/0452H04L25/02
CPCH04B7/0452H04B7/0814H04B7/0874H04L25/0204H04L25/0224H04B17/336
Inventor 周宝龙李谦石璟
Owner DATANG MOBILE COMM EQUIP CO LTD