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Method, system and device for transmitting coding instruction information and determining precoding matrixes

A technology of precoding matrix and indication information, applied in transmission systems, digital transmission systems, radio transmission systems, etc., and can solve problems such as performance degradation

Active Publication Date: 2014-05-07
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology

[0005] The present invention provides a method, system and equipment for transmitting encoding instruction information and determining a precoding matrix, to solve the problems existing in the prior art. The current codebook is designed for beamforming / precoding in the horizontal direction and is directly applied to three-dimensional Issues in beamforming / precoding techniques that cause performance degradation

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  • Method, system and device for transmitting coding instruction information and determining precoding matrixes

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Embodiment Construction

[0033] In this embodiment of the present invention, the user equipment determines the first precoding indication information, the second precoding indication information, and the third precoding indication information, where the first precoding indication information, the second precoding indication information, and the third precoding indication information are the same as Corresponding to the precoding matrix, the precoding matrix is ​​equal to the function matrix of the first component precoding matrix, the second component precoding matrix and the third component precoding matrix, the first component precoding matrix is ​​a block diagonal matrix; the third component precoding matrix The coding matrix is ​​composed of weighted column selection vectors, and the weighted column selection vectors are all zero except P non-zero elements. Since the constructed precoding matrix better matches the spatial channel of the three-dimensional beamforming, the performance of the three-di...

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Abstract

The invention relates to the technical field of wireless communication and specifically relates to a method, system and device for transmitting coding instruction information and determining precoding matrixes to solve a problem that decreased performance is caused when a codebook is applied directly to a three-dimension beam forming / precoding technology at present. The method includes: UE determining and sending first precoding instruction information, second precoding instruction information and third precoding instruction information, wherein the first precoding instruction information, the second precoding instruction information and the third precoding instruction information are corresponding to the precoding matrixes. A first component precoding matrix is a block diagonal matrix. A third component precoding matrix is comprised of weighted column selection vectors which include P non-zero elements, the other all being zero. Through adoption of the method, system and device for transmitting the coding instruction information and determining the precoding matrixes, performance of the three-dimension beam forming / precoding technology can be improved.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method, system and equipment for transmitting encoding indication information and determining a precoding matrix. Background technique [0002] The LTE (Long Term Evolution, Long Term Evolution) Rel-8 (version 8) system introduces a closed-loop precoding technology to improve spectrum efficiency. Closed-loop precoding first requires that both the base station and the user equipment store the same set of precoding matrices, which is called a codebook. After estimating the channel information according to the common pilot of the cell, the user equipment selects a precoding matrix from the codebook according to certain criteria. The selected criteria can be maximizing the amount of mutual information, maximizing the output signal-to-interference-noise ratio, and so on. The user equipment feeds back the index of the selected precoding matrix in the codebook...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00
CPCH04B7/0456H04B7/0617H04B7/0639H04L1/00H04L25/0391
Inventor 高秋彬
Owner DATANG MOBILE COMM EQUIP CO LTD
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