Cascade emission method of channel coding and space time coding

A technology of channel coding and space-time coding, which is applied in the field of cascaded transmission of channel coding and space-time coding in multiple-input multiple-output OFDM systems, can solve problems such as space-time transmission not involving channel coding, and achieve improved Performance, Guaranteed Coding Gain Effect

Inactive Publication Date: 2008-07-23
ZTE CORP
View PDF0 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, by completing the operation of transmitting space-time codes on time and subcarriers, although the transmission cycle required to complete the transmission of space-time codes is reduced, thereby reducing the impact of channel correlation time on space-time c

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
  • Cascade emission method of channel coding and space time coding
  • Cascade emission method of channel coding and space time coding
  • Cascade emission method of channel coding and space time coding

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0046] The specific embodiments of the present invention will be described in more detail below in conjunction with the accompanying drawings.

[0047] figure 1 It is a schematic diagram of the processing flow of the secondary puncturing process in the prior art.

[0048] figure 2 It is a schematic diagram of a cascaded transmission scheme of channel coding and space-time block coding in MIMO+OFDM of the present invention. It includes the following steps:

[0049] (1) The sender encodes the information bits output by the source to obtain information bits and check bits;

[0050] (2) The sender determines whether the secondary puncturing is required according to the number of transmitting antennas n and the average number of pilots required for each subband, and determines the order of primary puncturing, secondary puncturing and interleaving according to the interleaving mode;

[0051] (3) The sender modulates the channel-encoded signal to obtain modulation symbols;

[0052] (...

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 a method for cascade-emitting communication channel codes and space-time codes in a multi-input multi-output frequency division multiplexing system. The method of the invention comprises: firstly, encoding information bits which are outputted by a information source in communication channel by an originating end and obtaining information bits and check bits, then, confirming whether the originating end needs carrying out second deletion or not according to the transmitting aerial number n and the average number of pilot frequencies which are needed by each sub-belt and confirming the order of a first deletion, the second deletion and interlace according to an interlace mode, modulating binary sequences which are obtained by the originating end and obtaining modulation symbols, transforming the modulation symbols from parallel to serial by the originating end, carrying out space-time encoding, and obtaining code words after encoding, and finally mapping the code words and the pilot frequency on different sub-carrier waves by the originating end and emitting through n strips of transmitting aerials. The MIMO+OFDM not only can obtain coding gains of the communication channel codes to the maximum but also can obtain diversity gains of the space-time codes through utilizing the invention.

Description

technical field [0001] The present invention relates to a system coding transmission method, in particular to a cascade transmission method of channel coding and space-time coding in a multi-input multi-output orthogonal frequency division multiplexing system. Background technique [0002] Multi-antenna (MIMO) is an efficient wireless transmission technology developed in recent years, which refers to the use of multiple transmitting antennas and receiving antennas at the transmitting end and receiving end, respectively. The traditional communication system is a single-input-single-out SISO system. MISO and SIMO based on transmit diversity and receive diversity are also special cases of MIMO. The basic idea of ​​MIMO is to use multiple antennas at both ends of transmitting, receiving or transmitting and receiving, and make full use of the independent fading characteristics between channels through space-time processing technology to improve spectrum utilization, communication...

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): H04L1/00H04L1/06H04L27/26
Inventor 刘巧艳李玉洁余秋星赵路
Owner ZTE CORP
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