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

Codebook selection and modulation method being applied under MIMO-OFDM system to overcome weak scattering

A technology of MIMO-OFDM and modulation method, which is applied in transmission system, baseband system, multi-frequency code system, etc., and can solve problems such as limited anti-fading and anti-jamming performance

Inactive Publication Date: 2011-03-09
BEIJING UNIV OF POSTS & TELECOMM
View PDF3 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of BICM, although bit interleaving modulation increases the time diversity of coding and modulation, its anti-fading and anti-jamming performance is limited because the coding and modulation are not jointly optimized to obtain modulation diversity gain.

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
  • Codebook selection and modulation method being applied under MIMO-OFDM system to overcome weak scattering
  • Codebook selection and modulation method being applied under MIMO-OFDM system to overcome weak scattering
  • Codebook selection and modulation method being applied under MIMO-OFDM system to overcome weak scattering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0096] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0097] The present invention is a joint design method of precoding codebook selection and rotational modulation based on MIMO-OFDM system. The method diffuses and distributes the transmitted data to different components through rotational modulation, so that the data of different components are respectively in the channel In order to increase the advantages of signal space diversity, and then select the optimal rotation angle to obtain the maximum performance improvement; at the same time, introduce MIMO space diversity, time diversity, OFDM frequency diversity, and time-frequency interleaving diversity to achieve joint coding The gain brought by modulation diversity effectively improves system performance.

[0098] see figure 1 , introducing the codebook selection modulation method applied to the MIMO-OFDM system to overcome weak scattering, the metho...

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 precoding codebook selection and rotation modulation joint design method based on an MIMO-OFDM system, which comprises the steps of diffusing and distributing transmitted data onto different components through rotation modulation, leading the data of the different components to realize independent fading on respective signal channels so as to increase the advantages of signal space diversity, and further selecting the optimal rotation angle to obtain the maximum lift of the performances; and simultaneously introducing MIMO space diversity, time diversity and OFDM frequency diversity, as well as time-frequency interleaving diversity, thereby realizing gain caused by joint coding modulation diversity and effectively improving the performances of the system.

Description

technical field [0001] The present invention relates to a modulation method in a digital communication system, in particular to a method suitable for channel conditions of weak scattering and strong correlation, through the combination of multi-antenna codebook precoding and rotational modulation scheme through a new codebook selection criterion, so that The invention relates to a modulation method in which channel coding gain is effectively combined with time diversity, space diversity and modulation diversity for joint optimization. It is a modulation method under a MIMO-OFDM system based on codebook precoding with high efficiency and high spectrum efficiency, and belongs to the field of communication technology. Background technique [0002] With the development of cellular mobile communication, Internet and multimedia services, the demand for capacity of wireless communication in the world is increasing rapidly. On the other hand, the available wireless spectrum is limite...

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): H04L1/06H04L27/26
CPCH04L25/03898H04L1/0071H04B7/0456H04L27/2601
Inventor 吴湛击张力岭王文博
Owner BEIJING 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