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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and precoding matrix, which is applied in the field of precoding methods and devices, and can solve problems such as no longer applicable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It can be seen that the current codebook scheme is obviously no longer applicable to the new antenna form under 3D-MIMO

Method used

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  • A precoding method and device
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Examples

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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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