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

An Interference Alignment Method Based on Antenna Selection

A technology for interference alignment and antenna selection, applied in baseband systems, baseband system components, radio transmission systems, etc., can solve problems such as increased complexity of methods, and achieve the effect of reducing the amount of information and reducing hardware costs

Active Publication Date: 2020-06-12
NANJING UNIV OF POSTS & TELECOMM
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Adding antenna selection technology to interference alignment will increase the complexity of the method. In order to reduce the complexity of the method implementation, most scenarios discuss the situation where the receiving end is configured with one antenna, and there are few scenarios where there are multiple antennas.

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
  • An Interference Alignment Method Based on Antenna Selection
  • An Interference Alignment Method Based on Antenna Selection
  • An Interference Alignment Method Based on Antenna Selection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0033] figure 1 It is the equivalent interference channel diagram of the 2-cell K-user system applicable to the present invention. In this case, 2 cells are used, each cell serves 4 users, and the base station and users are respectively equipped with 50 and 5 downlink channel scenarios. The system works in downlink. Each base station will cause interference to users outside the cell, the system model is as follows figure 1 As shown, the process is as follows figure 2 As shown, taking cell 1 as an example, the specific implementation steps are:

[0034] (1), the number of initialization iterations q=1, the number of cells is 2;

[0035] (2) The number of users in each cell is initialized as K=4, the number of antennas configured by the base station is M=50, the number of antennas configured by each user is N=5, and the number of selected transm...

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 interference alignment method based on antenna selection. The sending end antenna selection technology and the sending end antenna selection technology used on a base station side are imported in the interference alignment method disclosed by the invention, and a column vector norm of a channel matrix is used as a selection parameter to select an antenna corresponding to a column vector with a relatively large norm. A pre-encoding matrix is designed according to the channel vector corresponding to the selected antenna, the pre-encoding matrix is composed of two serial matrixes, a front matrix is used for eliminating the interference among different users in the same cell, and a back matrix is designed for the existence of a zero-forcing matrix. Then, the zero-forcing matrix of a receiving end is designed to eliminate the interference caused by a neighbor cell. Firstly, the zero-forcing matrix is designed according to an interference channel matrix to eliminate the interference caused by the neighbor cell; and on the basis, the pre-encoding matrix is designed. In combination with the two technologies, the feedback information amount of the user is reduced, and higher system and rate can be obtained while realizing interference alignment on the premise of not greatly increasing the complexity.

Description

technical field [0001] The invention relates to the technical field of mobile wireless communication, in particular to an interference alignment method based on antenna selection. Background technique [0002] In order to meet the dynamic gain and simplify the signal processing process, Massive MIMO (Massive Multiple Input Multiple Output) technology came into being. Its core idea is to form an antenna array by configuring 50 or more antennas on the base station side to form multiple parallel data transmission channels. Through this technology, more users can be served at the same time, and the diversity gain and data transmission rate obtained by the system will be higher, thereby obtaining higher system capacity and spectrum utilization. Especially when the number of antennas configured by the base station tends to be infinite, the impact of thermal noise and inter-cell interference on system performance can be averaged, especially when the correlation between antennas is...

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 Patents(China)
IPC IPC(8): H04B7/0452H04B7/0456H04L25/03
CPCH04B7/0452H04B7/0456H04L25/0391
Inventor 董恒刘思琴张志伟
Owner NANJING UNIV OF POSTS & TELECOMM
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