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Method and apparatus for determining precoding matrix

A precoding matrix and matrix technology, which is applied in the field of communication, can solve the problem that the codebook structure of the cylindrical antenna array is not applicable.

Active Publication Date: 2018-09-07
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, technicians have proposed a codebook structure suitable for planar antenna arrays, however, there is no codebook structure suitable for cylindrical antenna arrays

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  • Method and apparatus for determining precoding matrix
  • Method and apparatus for determining precoding matrix
  • Method and apparatus for determining precoding matrix

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Embodiment Construction

[0068] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0069] It should be understood that the technical solutions of the embodiments of the present invention can be applied to various communication systems, for example: Global System of Mobile communication (Global System of Mobile communication, referred to as "GSM") system, Code Division Multiple Access (Code Division Multiple Access, referred to as "GSM") system CDMA") system, Wideband Code Division Multiple Access (referred to as "WCDMA") system, General P...

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Abstract

Disclosed are a method and apparatus for determining a pre-coding matrix. The method comprises: receiving a reference signal sent by a base station; determining a pre-coding matrix from a code book according to the reference signal; reporting a pre-coding matrix indicator corresponding to the pre-coding matrix to the base station, wherein the pre-coding matrix W is a kronecker product of a matrix Wa and a matrix Wv , W = Wa ⊗ Wv , Wa or Wv is a first matrix, and the first matrix is obtained by operating a matrix unit Vn which is a matrix of M x 1 and has a form as shown in (I), where P = M or P = π / sin(π / Μ), M is an integer and M equals the row number of the first matrix or half of the row number of the first matrix, N1 is an integer greater than 1, n is an integer and 0 ≤ n ≤ (N1-1), j=√-1, and s is a preset real number. The method and apparatus for determining a pre-coding matrix in the present invention are mainly applied to the scenario where a base station has a circular cylinder antenna array, and can improve the transmission performance of downlink information and user experience.

Description

technical field [0001] Embodiments of the present invention relate to the communication field, and more specifically, to a method and device for determining a precoding matrix. Background technique [0002] In a wireless communication system, spatial multiplexing is used to use multiple antennas to obtain a higher transmission rate. In addition, in order to further improve the transmission performance of the system, the wireless communication system adopts feedback enhancement technology. Specifically, the base station sends a predefined pilot signal, and the user equipment (User Equipment, UE) performs channel state information (Channel State-Information, CSI) measurement according to the pilot signal sent by the base station, and reports the result of the CSI measurement to the base station. Measurement results, wherein the CSI reported by the UE may include at least one of the following information: Rank Indicator (Rank Indicator, RI), Wideband Precoding Matrix Indicator...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/06H04L1/06
CPCH04B7/0639H04B7/0456H04B7/0617
Inventor 吴强刘建琴
Owner HUAWEI TECH CO LTD