Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for determining pre-coding matrix and corresponding communication method and equipment

一种预编码矩阵、子带预编码的技术，应用在多天线技术中的预编码领域，能够解决性能差强人意等问题

Active Publication Date: 2012-04-04
ALCATEL LUCENT SHANGHAI BELL CO LTD
View PDF2 Cites 26 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Not only does this bring some overhead, but the performance of the proposal is somewhat unsatisfactory

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for determining pre-coding matrix and corresponding communication method and equipment
  • Method for determining pre-coding matrix and corresponding communication method and equipment
  • Method for determining pre-coding matrix and corresponding communication method and equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] Firstly, the codebook design according to the present invention will be described below.

[0024] First take MIMO for M transmit antennas with a uniform linear array (ULA) as an example. code word W 1 ∈C 1 Corresponding to broadband and / or long-term channel characteristics, and denoted W 2 ∈C 2 Corresponds to frequency selection and / or short-term channel characteristics. W 1 The number of codebook C 1 The size of is recorded as p; W 2 The number of codebook C 2 The size of is recorded as q. The form of the precoding matrix for the subband is W=W 1 W 2 . For closely spaced ULAs (for example, the modulus of the correlation coefficient of the antennas is greater than a predetermined threshold, or the distance between the antennas is less than or equal to 1 / 2 times the signal wavelength), the main eigenvector of the channel matrix can be approximated as a DFT vector. Therefore, the present invention proposes for W 1 and W 2 The codeword, so that W is an M × 1 ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for determining a pre-coding matrix for sub-band pre-coding of a transmitter, wherein the transmitter is provided with M transmitting antennas. The method comprises the steps of: a. determining a first optimal matrix W1 according to the relevant information of a broadband and / or a longtime information channel, wherein the first matrix W1 corresponds to the characteristics of the broadband and / or the longtime information channel; b. multiplying the first optimal matrix W1 and each second matrix W2 in a second codebook so as to obtain a plurality of alternative pre-coding matrixes, wherein the second matrix W2 corresponds to the frequency choice and / or the characteristics of a short-time information channel; and c. selecting the optimal matrix from the plurality of alternative pre-coding matrixes according to the frequency choice and / or the status information of the short-time information channel for pre-coding the data to be transmitted. The method is characterized in that the number of DFT (Discrete Fourier Transform) wave beams is increased, thereby improving the spatial resolution; a diagonal matrix is introduced into the first matrix W1; the phase adjustment is introduced into the second matrix W2; and adjusted phases are ensured to be uniformly distributed in the whole phase space.

Description

technical field [0001] The present invention relates to multi-antenna technology, in particular to a precoding method in multi-antenna technology. Background technique [0002] According to the currently industry-agreed LTE-A Release 10 (Rel-10) standard (R1-101683), subband precoding consists of two precoding matrices, one of which corresponds to wideband and / or long-term Channel characteristics, the matrix is ​​denoted as W 1 ; while another precoding matrix corresponds to frequency selection and / or short-term channel characteristics, which is denoted as W 2 . The product of these two matrices is used as a precoding matrix for precoding data. [0003] In proposal R1-105011, a two-stage feedback method is proposed, where W 1 is a matrix with dimension M×Nb, W 2 is a matrix of dimension Nb×r. In the proposal to W 2 In the codebook design of , there is a phase modulation factor to try to match the phases of antennas 1 to M / 2 and the phases of antennas M / 2 to M. In tur...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04L1/00
CPCH04B7/0426H04B7/0456H04B7/0617H04B7/0469H04L25/03343H04B7/0626H04B7/065
Inventor 武露陈晋辉宋扬杨红卫吕荻刘皓
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com