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Method and device for determining beamforming vector of multiple data streams

A technology of beamforming vectors and multiple data streams, which is applied in the field of communication, can solve the problems of reduced accuracy of eigenvectors, high complexity, and the impact of the number of iterations on accuracy, etc.

Active Publication Date: 2015-12-02
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology

The EBB algorithm can obtain obvious gains in different channels, and is widely used in multi-antenna systems, but the complexity of calculating eigenvectors is high. At present, the more mature calculation methods for shape vectors include power method, Jacobi method and sub The spatial iterative method uses iterative search to find the eigenvectors. Not only is the complexity high, but also the accuracy is affected by the channel characteristics and the number of iterations. If multiple eigenvectors are searched for multi-stream beamforming, the features searched later will be The precision of the vector will gradually decrease

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  • Method and device for determining beamforming vector of multiple data streams
  • Method and device for determining beamforming vector of multiple data streams
  • Method and device for determining beamforming vector of multiple data streams

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Embodiment Construction

[0019] The embodiment of the present invention provides a multi-data stream beamforming vector determination method and device, by performing complex conjugate transposition processing on the uplink channel vector to obtain a single data stream beamforming vector, and then obtain it through Schmidt orthogonalization For beamforming vectors of other data streams, since the eigenvalue decomposition is no longer used to determine the beamforming vectors, the complexity of the calculation process is greatly reduced, and the accuracy of vector calculations will not be affected by the characteristics of the channel.

[0020] Such as figure 1 As shown, the multi-data stream beamforming vector determination method provided by the embodiment of the present invention includes:

[0021] Step S101, determining the channel vector of the uplink channel corresponding to each data stream;

[0022] Step S102. Determine the beamforming vector of one of the data streams according to the channel...

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Abstract

Disclosed are a method and device for determining a multi-data stream beam-forming vector, which relate to communication technology. The method comprises: obtaining a single data stream beam-forming vector by conducting complex conjugate transposition processing on an uplink channel vector; and obtaining other data stream beam-forming vectors through Schmidt orthogonalization. Because a characteristic value decomposition manner is no longer used to determine a beam-forming vector, the complexity in the process of computation is greatly reduced, and the vector computation accuracy is no longer influenced by the characteristics of a channel.

Description

technical field [0001] The present invention relates to communication technology, in particular to a method and device for determining multi-data stream beamforming vectors. Background technique [0002] At present, the beamforming technology adopted in the multi-antenna system widely adopts the beamforming algorithm based on eigenvalue decomposition (Eigenvalue Based Beamforming, EBB). The shape vector adopted by the EBB algorithm satisfies: [0003] w = arg max w k w k H R xx w k [0004] That is, select the vector that can make the transmission obtain the maximum power gain as the shaping vector, and the shaping vector is the R of the channel correlation matrix xx The eigenvector corresponding to the largest eigenvalue of . The eigenvect...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/06H04B7/04
CPCH04B7/0617
Inventor 吴凯李琼刘龙
Owner DATANG MOBILE COMM EQUIP CO LTD