A Joint Soft Sparse Encoding Scheme for Relay System

Author

Zhang, Qin ; Lin, Dengsheng ; Wu, Gang

Author_Institution

Nat. Key Lab. of Sci. & Technol. on Commun., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

fYear

2011

Firstpage

1

Lastpage

4

Abstract

In this paper, we study a joint soft sparse encoding scheme for the three-node relay system. The relayed soft information is expressed basing on the Log- Likelihood-Ratios (LLRs) of the received signals at the relay. We investigate this coding method by using a regular LDPC code at the source and a sparse generator matrix at the relay. We also deliberately design the structure of the joint code by Gaussian approximation. Simulation results demonstrate that the system which uses the proposed coding scheme can obtain a considerable gain over the traditional hard encoding scheme.

Keywords

Gaussian processes; approximation theory; cellular radio; parity check codes; relays; source coding; Gaussian approximation; LDPC code; LLR; cellular network; hard encoding scheme; joint soft sparse encoding scheme; log-likelihood-ratio; relayed soft information; sparse generator matrix; three-node relay system; Decoding; Generators; Joints; Parity check codes; Relays; Turbo codes;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications, Networking and Mobile Computing (WiCOM), 2011 7th International Conference on

Conference_Location

Wuhan

ISSN

2161-9646

Print_ISBN

978-1-4244-6250-6

Type

conf

DOI

10.1109/wicom.2011.6040182

Filename

6040182