A precoding method and device

A technology of precoding and precoding matrix, which is applied in the field of precoding methods and devices, and can solve problems such as no longer applicable

Inactive Publication Date: 2020-06-30
江苏星地通通信科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, current codebooks, even dual codebooks, are only set for antennas in the horizontal dimension
It...

Method used

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  • A precoding method and device
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  • A precoding method and device

Examples

Experimental program
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Effect test

example 1

[0306]

[0307]

[0308] At this time, A 1 The phase change between adjacent column vectors in A is continuous, or A 1 There can be only one column vector in . As shown in formula (1), A 1 Among the 4 column vectors in , every two adjacent column vectors are continuous. In formula (2), when P≥2, B 1 There is no continuity between two adjacent column vectors in . or, B 1 The two column vectors in are orthogonal, at this time, P is equal to 1, N 2 is equal to 2, or,

[0309] Among them, A 1 denote the channel characteristics in the horizontal dimension, and B 1 represents the channel characteristics in the vertical dimension, or A 1 Denotes the channel characteristics in the vertical dimension, B 1 Represents the channel characteristics in the horizontal dimension.

[0310] It should be noted that this is just an example. In practical applications, A 1 and B 1 The matrix dimension of is variable. For example, matrix A 1 The number of rows can be 2, 3, 4, 5...

example 2

[0315]

[0316] or

[0317]

[0318] or

[0319]

[0320] or

[0321]

[0322] i.e. in matrix A 1 In , some adjacent column vectors are continuous, and some adjacent column vectors are discontinuous, that is, large spacing, or orthogonal. For example, A in formula (4-a) 1 or B in formula (4-b) 1, the phase between the first two adjacent column vectors is continuous, and the phase between the last two adjacent column vectors is continuous, but if P 1 >2, the phases of the two column vectors in the second column and the third column are discontinuous. For example, A in formula (5-a) 1 or B in formula (5-b) 1 , the phases of the first three column vectors are continuous, and if P 1 >3, the phase between the two column vectors in the 3rd column and the 4th column is discontinuous.

[0323] Further, in formula (4-a) or formula (4-b), the two column vectors of the 2nd column and the 3rd column are orthogonal to each other, or the two column vectors of the 1st co...

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Abstract

The present invention relates to the technical field of mobile communications, and in particular to a precoding method and apparatus for solving the technical problem that an existing codebook solution is not applicable to a new antenna form under 3D-MIMO anymore. Provided is a new form W1, wherein W1 can contain a plurality of block matrices, and each of the block matrices can be represented as a Kronecker product of a matrix Ai and a matrix Bi, so that W can not only support an antenna in a horizontal dimension, but can also support an antenna in a vertical dimension, thereby providing a new codebook for a 3D-MIMO system.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a precoding method and device. Background technique [0002] In a wireless communication system, after obtaining CSI (Channel State Information, channel state information), the transmitter can transmit a signal through a precoding matrix to improve overall system performance. For example, the signal at the receiving end can be expressed as [0003] y=HVs+n [0004] Wherein, y represents a receiving end signal, H represents channel state information, V represents a precoding matrix, s represents a signal, and n represents noise. Both the transmitting end and the receiving end generally store a set of precoding matrix V, which is also called a codebook. By feeding back PMI (Precoding Matrix Indicator, precoding matrix indication) at the receiving end, the transmitting end can obtain the information required for the transmitted signal. precoding matrix. [0...

Claims

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Application Information

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IPC IPC(8): H04L1/06
CPCH04L1/06
Inventor 张雷鸣刘江华刘鹍鹏
Owner 江苏星地通通信科技有限公司
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