Method and device for transmitting coding indicator information, and method and device determining precoding matrix

A technology of precoding matrix and indication information, applied in the field of communication, can solve the problem that the resolution of codeword cannot be adjusted flexibly

Active Publication Date: 2017-03-08
DATANG MOBILE COMM EQUIP CO LTD
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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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  • Method and device for transmitting coding indicator information, and method and device determining precoding matrix
  • Method and device for transmitting coding indicator information, and method and device determining precoding matrix
  • Method and device for transmitting coding indicator information, and method and device 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 adjus...

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Abstract

The invention discloses a method and device for transmitting coding indicator information, and a method and device determining a precoding matrix and is used for solving the problem that resolution of codons in a codebook which is generated by combining beam vector subgroups and column selection cannot be adjusted flexibly. The method for transmitting the coding indicator information comprises the steps that user equipment determines first precoding indicator information and second precoding indicator information, wherein the first precoding indicator information corresponds to a first level precoding matrix, the first level precoding matrix comprises beam vectors in different polarization directions, the second precoding indicator information corresponds to a second level precoding matrix, the second level precoding matrix is used for carrying out amplitude weighting and phase adjustment on all beam vectors in each polarization direction of the first level precoding matrix, and the first level precoding matrix and the second level precoding matrix are used for generating the precoding matrix. The resolution of the precoding matrix is adjusted flexibly by carrying out the amplitude weighting and phase adjustment on all beam vectors in each polarization direction of the first level precoding matrix, 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 Applications(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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