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Method determining pre-coding matrix indication, user equipment, and base station evolution node

A technology of precoding matrix and user equipment, which is applied in baseband system, baseband system components, shaping network in transmitter/receiver, etc. It can solve the problems of system performance degradation and lack of consideration of vertical antenna freedom, etc., to achieve Effect of Improving CSI Feedback Accuracy and System Throughput

Active Publication Date: 2017-04-26
HUAWEI TECH CO LTD
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Problems solved by technology

[0006] The 4-antenna codebook of the existing LTE R8 system based on the Householder transform design and the 8-antenna codebook of the R10 system based on the dual codebook design are mainly designed for horizontal antennas, without considering the degree of freedom of vertical antennas, and are directly used for AAS base station antennas When deployed, system performance will be severely degraded

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  • Method determining pre-coding matrix indication, user equipment, and base station evolution node
  • Method determining pre-coding matrix indication, user equipment, and base station evolution node
  • Method determining pre-coding matrix indication, user equipment, and base station evolution node

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no. 1 example

[0035] figure 1 It is a flow chart of the first embodiment of the method for determining the precoding matrix indication in the present invention. As shown in the figure, this embodiment specifically includes the following steps:

[0036] Step 101, receiving a reference signal sent by a base station;

[0037] Specifically, the reference signal sent by the base station may include a channel state information reference signal (channelstate information Reference Signal, CSI RS) or a demodulation reference signal (demodulation RS, DMRS) or a cell-specific reference signal (cell-specific RS, CRS). The user equipment UE may obtain the resource configuration of the reference signal and obtain the reference signal in the corresponding resource or subframe by receiving eNB notification (such as RRC (Radio Resource Control) signaling or downlink control information DCI) or based on the cell ID.

[0038] Step 102, based on the reference signal, select a precoding matrix from a codebook...

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Abstract

The invention relates to a method determining a pre-coding matrix indication, user equipment UE, and a base station eNB and a system; the method comprises the following steps: receiving a reference signal sent by the base station; selecting a pre-coding matrix from a codebook according to the reference signal, wherein the codebook comprises a pre-coding matrix, the pre-coding matrix W refers to the product of two matrixes W1 and W2, the W1 refers to a partitioning diagonal matrix, and each partitioning matrix refers to the kronecker product of a matrix Ai and a matrix Bi; sending a pre-coding matrix indication PMI to the base station, wherein the PMI is matched with the selected pre-coding matrix, and the base station can obtain the pre-coding matrix according to the PMI. According to the pre-coding matrix formed by the matrix Ai and matrix Bi and supporting vertical direction and horizontal direction quantification, the method and system can fully utilize the degree of freedom in the horizontal direction and vertical direction, thus greatly improving channel state information feedback precision.

Description

technical field [0001] The present invention relates to the field of mobile communication, in particular to a method for determining a precoding matrix indication, a user equipment, a base station evolution node and a system. Background technique [0002] Through transmit precoding and receive combining, a multiple input multiple output (Multiple Input Multiple Output, MIMO) wireless system can obtain diversity and array gain. A system utilizing precoding can be expressed as [0003] [0004] where y is the received signal vector, H is the channel matrix, is the precoding matrix, s is the transmitted symbol vector, and n is the measurement noise. [0005] Optimal precoding usually requires the transmitter to be fully aware of Channel State Information (CSI). A commonly used method is that the user equipment (User Equipment, UE), or the mobile station (MobileStation, MS) (hereinafter referred to as UE) quantizes the instantaneous CSI and feeds it back to the Node B (No...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/0456H04B7/06H04L25/03
CPCH04B7/0469H04B7/0478H04B7/0639H04B7/065H04L25/03949H04B7/0456H04B7/0617
Inventor 王建国周永行
Owner HUAWEI TECH CO LTD
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