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Base station transmitting antenna beam forming method based on Householder operation

A transmit antenna and beamforming technology, which is applied in space transmit diversity, diversity/multi-antenna system, radio transmission system, etc., can solve the problem of complex singular value decomposition of channel matrix, complicated method, and inability to realize the singularity of channel matrix dimension greater than 2 Value decomposition and other issues

Active Publication Date: 2015-04-22
ZHONGKE JINGSHANG SUZHOU INFORMATION TECHCO
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Problems solved by technology

These methods are to obtain the weighting matrix of beamforming under the condition of fully realizing the singular value decomposition of the channel matrix, and the method is relatively complicated.
[0005] According to the literature: Yue Wang, Kevin Cunningham, Prawat and Jeremy Johnson. Singular Value Decomposition Hardware for MIMO: State of the Art and Custom Design. Using bilateral Jacobi algorithm to realize the singular value decomposition of 2×2 complex matrix, but this method cannot Realize singular value decomposition with channel matrix dimension greater than 2
[0006] With the increase in the number of base station antennas and user antennas, the singular value decomposition of the channel matrix for MIMO systems is more complicated

Method used

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  • Base station transmitting antenna beam forming method based on Householder operation
  • Base station transmitting antenna beam forming method based on Householder operation
  • Base station transmitting antenna beam forming method based on Householder operation

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Embodiment 1

[0029] like figure 1 As shown, for a MIMO communication system where 8 antennas of the base station transmit and 2 antennas of the user receive, the channel response matrix H can be expressed as:

[0030] H = h 11 h 12 h 21 h 22 . . . . . . h 81 ...

Embodiment 2

[0043] For a MIMO communication system with 4 transmit antennas in the base station and 4 receive antennas in the user, the channel response matrix H can be expressed as:

[0044] H = h 11 h 12 h 13 h 14 h 21 h 22 h 23 h 24 h 31 ...

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Abstract

The invention discloses a base station transmitting antenna beam forming method based on Householder operation. The base station transmitting antenna beam forming method is designed for solving the problem that in the prior art, an algorithm for obtaining a beam forming weighted matrix is complex. The method includes the steps that received sounding reference signals (SRSes) are used for obtaining an up channel estimation matrix H, Householder conversion is used for converting the complex matrix H into double diagonal matrixes, and a column vector of a Householder conversion device on the left side serves as the weight vector of base station transmitting antenna beam forming.

Description

technical field [0001] The invention relates to a base station transmitting antenna beamforming method based on Householder calculation. Background technique [0002] Beamforming technology combines smart antenna forming technology and MIMO spatial multiplexing technology to simultaneously transmit multiple data streams to achieve space division multiplexing, and can maintain the wide coverage achieved under the traditional single stream, improve cell capacity and reduce interference. In an Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency Division Multiple) multi-carrier system, the method for obtaining optimal beamforming weights is the eigenbeamforming method, which designs the beamforming vector of the transmitting end according to the maximum signal-to-noise ratio criterion. By performing eigenvalue decomposition on the channel correlation matrix of each subcarrier of the user, find the eigenvector corresponding to the eigenvalue to realize beamform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06
CPCH04B7/0413H04B7/0617H04B7/0634
Inventor 王永兵林江南冯雪林苏泳涛石晶林凌章
Owner ZHONGKE JINGSHANG SUZHOU INFORMATION TECHCO
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