Selection method of pre-encoding matrix

A technology of precoding matrix and codebook matrix, which is applied in the field of precoding, can solve the problems of large amount of calculation and high computational complexity, and achieve the effect of reducing computational complexity

Active Publication Date: 2010-09-29
POTEVIO INFORMATION TECH CO LTD +1
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Problems solved by technology

Since this method adopts the traversal operation, the calculation complexity is high and the calculation amount is large, especially when there are many codebook vectors and codebook matrices, and the number of transmitting antennas is large, the computational complexity increases rapidly. Therefore, the traversal method realizes The selection of the precoding matrix is ​​not suitable for the case of a large number of codebooks

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  • Selection method of pre-encoding matrix
  • Selection method of pre-encoding matrix
  • Selection method of pre-encoding matrix

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Embodiment Construction

[0048] In order to make the purpose, technical means and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0049] The basic idea of ​​the present invention is: group all codebook matrices according to characteristics, then select the optimal rank according to one of the matrices in each group, and then select the precoding matrix with the best performance among the groups.

[0050] figure 1 It is an overall flowchart of the precoding matrix selection method in the present invention. like figure 1 As shown, the method includes:

[0051] Step 101, all codebook matrices are grouped, and other codebook matrices in each group are formed by the first codebook matrix in the group through modulus-invariant row transformation; for each group, when the number of layers is determined to be n, the The columns included in the precoding matrix corresponding to each codebook matrix ...

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Abstract

The invention discloses a precoding matrix selection method. According to the characteristics of a codebook matrix, the original codebook is grouped according to the principle that the matrix in every group is obtained through line translation of one of first codebook matrixes and the line translation includes translation among different lines with magnitude unchanged. On the basis of the grouping of the codebook matrix, the optimal order selection is conducted by utilizing the first codebook matrixes of each group, selection starts from 1 layer, layers meeting the requirements of a signal-to-noise radio are added gradually and the number of layers fulfilling the optimal performance of the group is finally obtained; and then the selection of optimal precoding matrix and MCS is conducted according to different performance evaluation standards by utilizing the first codebook matrixes of each group. The precoding matrix section conducted in the manner greatly reduces calculation complexity due to no need to traverse all codebook matrixes and meanwhile the method can be close to the performance of an exhaustion method through verification.

Description

technical field [0001] The present invention relates to a precoding technology in a communication system, in particular to a method for selecting a precoding matrix. Background technique [0002] In mobile communication, the "central base station-distributed terminal" mode is adopted. In this mode, it is difficult for mobile terminals to perform cooperative transmission and reception. Therefore, a feasible and effective way in practice is to use the base station to centralize the data received and transmitted. . Therefore, the multi-user detection technology is generally used in the uplink point-to-multipoint system, and the MIMO (Multiple Input Multiple Output) precoding technology is generally used in the downlink point-to-multipoint system. MIMO precoding technology is to pre-process the transmitted signal at the transmitting end in the case of known channel state information CSI (Channel States Information), so as to facilitate the signal detection of the receiver and i...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H04L1/06H04B7/06
Inventor林雪红龚萍吕旌阳梁童赵振山雷旭胡炜
OwnerPOTEVIO INFORMATION TECH CO LTD