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

Method and device for selecting pre-coding matrix/vector in multi-input and multi-output system

A precoding matrix and precoding vector technology, applied in diversity/multi-antenna systems, error prevention/detection using return channels, error prevention/detection through diversity reception, etc., can solve the problem of not considering retransmission data, reducing system Performance and other issues, to achieve the effect of increasing the link peak rate or cell capacity, improving throughput, and increasing the probability of pairing

Inactive Publication Date: 2014-04-09
NTT DOCOMO INC
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method and device for selecting a precoding matrix / vector in a multiple-input multiple-output system, which solves the problem that in the prior art, when the user feeds back the antenna index information, retransmission data is not considered, which leads to a certain degree of reduced system performance technical issues

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 and device for selecting pre-coding matrix/vector in multi-input and multi-output system
  • Method and device for selecting pre-coding matrix/vector in multi-input and multi-output system
  • Method and device for selecting pre-coding matrix/vector in multi-input and multi-output system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0045] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] The present invention mainly provides a method for selecting an effective vector index in a MIMO precoding system, and the method can further improve the throughput of the system after considering whether the user retransmits or not.

[0047] The present invention is divided into two cases according to the number of users of the MIMO precoding system, one is a single user case, and the other is a multi-user case, and the two cases will be described in detail below.

[0048] 1. Single user situation.

[0049] The application of the present invention in the downlink single-user MIMO system is a retransmission-based PMI (Preferredmatrix Index preferred matrix index) selection method.

[0050] For a single-user MIMO system, all antennas transmit...

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 method and a device for pre-coding matrix / vector in a multi-input and multi-output system. The method comprises the steps as follows: a data receiving terminal selects the pre-coding matrix index or the pre-coding vector index of a user by judging whether every data stream of the user transferred is retransmission data stream or not. After the condition that the user retransmission is needed or not is considered, pre-coding index information fed back by the user in a multi-input and multi-output pre-coding system is selected, thereby the throughput of the system is further enhanced.

Description

technical field [0001] The invention relates to a scheduling method for effectively improving link peak rate or cell capacity in a MIMO precoding system, in particular to a method and device for selecting a precoding matrix / vector in a MIMO system. Background technique [0002] Over the past few years, wireless services have become increasingly important, while the need for higher network capacity and higher performance continues to grow. Several options such as higher bandwidth, optimized modulation and even code multiplexing systems have limited potential to improve spectral efficiency, and the focus of development has been placed on MIMO (Multiple Input Multiple Output, or "Multiple Input Multiple Output") systems , which utilizes spatial multiplexing techniques to improve the efficiency of the used bandwidth by employing antenna arrays. [0003] MIMO requires precoding before the antenna array transmits data streams. MIMO precoding technology can effectively improve lin...

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): H04L1/02H04L1/18H04B7/04
Inventor 刘芳佘小明陈岚
Owner NTT DOCOMO INC
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