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Method and device for selecting precoding matrix

A technology of precoding matrix and selection device, applied in coding, coding element, code conversion and other directions, can solve problems such as large amount of calculation and complicated operation, and achieve the effect of reducing the amount of calculation and complexity

Inactive Publication Date: 2013-06-05
ZTE CORP
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Problems solved by technology

[0028] In view of this, the main purpose of the present invention is to provide a method and device for selecting a precoding matrix to solve the problems of large calculation and complicated operation in the existing precoding matrix selection method

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  • Method and device for selecting precoding matrix
  • Method and device for selecting precoding matrix
  • Method and device for selecting precoding matrix

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Embodiment Construction

[0056] The technical solutions of the present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0057] The present invention provides a kind of precoding matrix selection method, in order to realize relatively simple precoding matrix selection operation, a kind of precoding matrix selection method provided by the present invention, such as figure 2 As shown, it mainly includes the following steps:

[0058] In step 201, the receiving end estimates the channel to obtain a channel matrix H.

[0059] Step 202, the receiving end restores H according to the precoding matrix in the set precoding codebook and the obtained channel matrix H H Eigenvalues ​​of H.

[0060] The receiving end sequentially uses each precoding matrix V in the set precoding codebook i And the channel matrix H to approximate restore H H The eigenvalues ​​of H are:

[0061] lambda i =V i H h H HV i ...

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Abstract

The invention discloses a method for selecting a precoding matrix, which comprises the following steps: estimating a channel to obtain a channel matrix; recovering a feature value of the product of the channel matrix and a conjugate transpose matrix of the channel matrix according to the channel matrix and the preset precoding matrix in a precoding codebook; and selecting the precoding matrix having the maximum feature value as the best precoding matrix according to the feature value. The invention also discloses a device for selecting a precoding matrix, which can reduce the amount of calculation and the complexity for selecting the precoding matrix by a receiving terminal effectively without performing of the singular value decomposition and a matrix inversion of the channel matrix H obtained from estimation.

Description

Technical field [0001] The invention involves wireless network technology transmitted by multiple space channels, especially a pre -coding matrix selection method and device. Background technique [0002] Input more and multi-output (MIMO, Multi-Input Multi-OUTPUT) technology, with the characteristics of the spectrum utilization rate and data transmission rate of wireless systems significantly improved, has become an important way for future mobile communication systems to achieve efficient data rates and high transmission quality qualityEssenceHowever, due to the correlation between multi -antenna space channels, it is difficult to separate multi -way data from the receiving end. Therefore, if the transmitting end is completely known or some known channel information, it can make full use of the known channel matrix information to the transmitting signal for the transmitting signal.Pre -code processing, and then adjust the power of each launch antenna of the MIMO communication s...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/06H03M13/00H04B7/04
Inventor 张婷
Owner ZTE CORP
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