Title :
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
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;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing (WiCOM), 2011 7th International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-6250-6
DOI :
10.1109/wicom.2011.6040182
