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A method and device for transmitting encoding indication information and determining precoding matrix

A technology of precoding matrix and indicating information, which is applied in the field of communication and can solve the problem that the resolution of codewords cannot be adjusted flexibly

Active Publication Date: 2020-03-03
DATANG MOBILE COMM EQUIP CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] Embodiments of the present invention provide a method and device for transmitting encoding indication information and determining a precoding matrix, which are used to solve the problem that the resolution of codewords cannot be flexibly adjusted in a codebook generated by using DFT beam vector subgroups combined with column selection

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  • A method and device for transmitting encoding indication information and determining precoding matrix
  • A method and device for transmitting encoding indication information and determining precoding matrix
  • A method and device for transmitting encoding indication information and determining precoding matrix

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Embodiment Construction

[0090] In a multi-antenna system based on linear precoding, the receiver selects an appropriate precoding matrix from a pre-defined set of precoding matrices according to channel information, and feeds back the index corresponding to the selected precoding matrix to the transmitter. This collection is called a codebook. The transmitter determines the corresponding precoding matrix according to the received index, and uses it to properly preprocess the transmitted signal, so as to improve the effectiveness and reliability of information transmission. A codebook is a necessary element to enable this process. The codebook design needs to match the channel distribution characteristics as much as possible and minimize the performance loss caused by codebook quantization. The embodiment of the present invention provides a codebook generation method using a linear weighting method under a MIMO channel, which solves the problem that the resolution of codewords cannot be flexibly adju...

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Abstract

The invention discloses a method and device for transmitting coding indication information and determining a precoding matrix, which are used to solve the problem that the resolution of codewords in a codebook generated by using beam vector subsets combined with column selection cannot be flexibly adjusted. The method includes: the user equipment determines first precoding indication information and second precoding indication information; the first precoding indication information corresponds to a first-level precoding matrix, and the first-level precoding matrix includes beam vectors of different polarization directions , the second precoding indication information corresponds to the second-level precoding matrix, and the second-level precoding matrix is ​​used to perform amplitude weighting and phase adjustment on all beam vectors in each polarization direction in the first-level precoding matrix. The first stage precoding matrix and the second stage precoding matrix are used to generate the precoding matrix. By performing amplitude weighting and phase adjustment on all beam vectors in each polarization direction in the first-stage precoding matrix, the resolution of the precoding matrix can be adjusted flexibly, and the system performance is improved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for transmitting encoding instruction information and determining a precoding matrix. Background technique [0002] Currently, in an LTE (Long Term Evolution, long-term evolution) system, a precoding codebook is mainly based on a DFT (Discrete Fourier Transform, discrete Fourier Transform) vector, and a two-stage codebook structure is used. Taking the 8-antenna codebook in Rel-12 as an example, the first stage determines a DFT beam vector subgroup, and the terminal indexes the beam vector subgroup in all beam vector subgroup sets, that is, PMI1 (Precoding Matrix Indicator, Precoding Matrix Indicator, The coding matrix indication) is fed back to the eNB; the second stage selects the column of the DFT beam vector subgroup, selects one column or several columns and performs phase adjustment between polarization directions, and the terminal selects ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0456
CPCH04B7/0456H04B7/04H04B7/0478H04B7/0639H04B7/0469H04B7/0634
Inventor 李辉高秋彬陈润华陈文洪拉盖施
Owner DATANG MOBILE COMM EQUIP CO LTD
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