Achieving method for MU-MIMO precoding

An implementation method and precoding technology, applied in the field of precoding algorithms, can solve the problems of high complexity of GZI precoding method, high complexity of solving pseudo-inverse, etc.

Inactive Publication Date: 2014-07-30
UNIV OF ELECTRONIC SCI & TECH OF CHINA
View PDF2 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0023] Although the GZI precoding method replaces the SVD decomposition in the first step of the BD precoding method by solving the pseudo-inverse operation and QR decomposition, the complexity is reduced, but the calcul

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
  • Achieving method for MU-MIMO precoding
  • Achieving method for MU-MIMO precoding
  • Achieving method for MU-MIMO precoding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0046] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. The parameters in the examples do not affect the generality of the invention.

[0047] In order to facilitate the description and analysis of the precoding method of the present invention, the MU-MIMO system is set as follows: figure 1 As shown, the total number of transmitting antennas is greater than or equal to the total number of receiving antennas of all users, that is, N T ≥N R ; The number of data streams communicated by each user is equal to the number of receiving antennas, and the transmission power allocation of the base station adopts the average power allocation.

[0048] The signal received by any user k can be expressed as:

[0049] y k = H k W k s k + H ...

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 discloses an achieving method for MU-MIMO precoding. The method includes the detailed steps that a first precoding matrix is obtained through performing improved QR decomposition on expanding matrixes H of joint channel matrixes HS of all users to eliminate multi-user interference, precoding matrixes of all the users are determined according to a QR decomposition result, and therefore calculation complexity is reduced; then a lattice reduction method is used for obtaining a second precoding matrix better in performance. Compared with a traditional MU-MIMO precoding method, the method is lower in complexity, and meanwhile system performance is improved.

Description

technical field [0001] The present invention belongs to the technical field of mobile communication, relates to multiple input multiple output (Multiple Input Multiple Output, MIMO) technology, and in particular to a precoding algorithm in a multiuser MIMO (multiuser MIMO, MU-MIMO) system. Background technique [0002] As a technology that can greatly improve the spectral efficiency of wireless communication, MIMO has received more and more attention under the background of increasingly scarce spectrum resources. With the deepening of multi-antenna technology research, MIMO technology has been extended from point-to-point single-user system to point-to-multipoint multi-user system. In the MU-MIMO system, the base station (Base Station, BS) sends signals to multiple users at the same time. Since multiple users share the same time-frequency resource, it will inevitably cause Multi-user Interference (MUI), which will greatly reduce the system efficiency. transmission efficienc...

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
IPC IPC(8): H04L1/06H04L1/00H04L25/03H04B7/06
Inventor 方舒巫健李磊李少谦
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap