User selecting method of multi-user MIMO communication system based on codebook

A communication system and multi-user technology, applied in the field of codebook-based low-complexity multi-user equipment scheduling in a multi-user equipment MIMO system, can solve high computational complexity, cannot guarantee quasi-orthogonal user equipment subsets, and cannot accurately know Channel state information and other issues to achieve the effect of simplifying the amount of calculation

Inactive Publication Date: 2010-03-10
SHANGHAI SECOND POLYTECHNIC UNIVERSITY
View PDF0 Cites 55 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method cannot guarantee to obtain the optimal quasi-orthogonal user equipment subset, and at the same time, in SUS, multiple searches and comparisons of user equipment are required, so the computational complexity

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
  • User selecting method of multi-user MIMO communication system based on codebook
  • User selecting method of multi-user MIMO communication system based on codebook
  • User selecting method of multi-user MIMO communication system based on codebook

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] A user selection method of a codebook-based multi-user MIMO communication system, comprising the following steps:

[0018] A. The channel quantization area is established according to the codebook specified by LTE (3GPP Long Term Evolution), that is, each codebook vector or represents a channel area. The establishment of the channel area according to the codebook specified by LTE is to partition the channel space. In a closed-loop MIMO system, the MIMO channel space can be quantized into a finite number of non-overlapping channel regions. Each quantized channel region can be represented by a vector or matrix. This vector or matrix is ​​called a codeword, and the codes of all channel regions A collection of words constitutes a codebook. During system operation, the channel vectors falling into each channel region can be approximated by the codewords of the corresponding region.

[0019] B. Establish the quasi-orthogonality relationship of each channel area according to...

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 provides a user selecting method of a multi-user MIMO communication system based on a codebook. An e Node B groups and selects dispatch users according to a PMI and a CQI feedback of users in a cell. The dispatch users are grouped according to the quasi orthogonality among codebook vectors expressed by the PMI. When the system runs, the e Node B ensures a signal path area which belong to each user according to the PMI feedback by a UE, selects a user with the maximal CQI to be taken as an optimum user of the area in the signal path subarea according to the CQI reported by the UE, computes the combined spectrum efficiency of each paired user group according to a previously set quasi orthogonality relationship, and selects one group of users with the largest combined spectrum efficiency to be taken as the current paired user group. The method can greatly simplify the computing complexity selected by the user in the multi-user MIMO communication system and can obtain the throughput performance near the optimum.

Description

technical field [0001] The invention belongs to the technical field of multi-user equipment scheduling in the wireless communication field, and in particular relates to a low-complexity multi-user equipment scheduling method based on a codebook in a multi-user equipment MIMO system. Background technique [0002] In a wireless communication system, multiple antennas are used on the transmitter and receiver to form a multiple-input multiple-output (MIMO) system. This transmission method can enhance the reliability of wireless transmission and increase the capacity of the wireless communication system. Theory proves that in a MIMO multi-user equipment system, the system can obtain multiplexing gain through linear precoding technology, that is, at a time, it can send signals to several user equipments at the same time. Linear precoding technology is currently a relatively practical and concerned technology. This technology uses an orthogonal precoding matrix for each user equipm...

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): H04L1/06H04L1/00H04L1/16H04L25/03
Inventor 杭娟佘锋
Owner SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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