A LDPC-based IR scheme for cooperative 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

fDate

21-23 Oct. 2011

Firstpage

73

Lastpage

76

Abstract

A cooperative IR (Incremental Redundancy) scheme in a three-node relay system is studied in this paper. The soft encoding at the relay is adopted to avoid the error propagation and improve the transmission efficiency. Alamouti coding is considered at the source and the relay to get cooperative transmitting diversity. We also derive the optimal IR LDPC codes by linear optimization of the whole code under Gaussian Approximation. At last, we simulate the proposed scheme under Rayleigh channel, the results show that the proposed scheme significantly outperforms the traditional IR strategy without the relay.

Keywords

Gaussian processes; Rayleigh channels; approximation theory; cooperative communication; diversity reception; linear programming; parity check codes; relays; Alamouti coding; Gaussian approximation; LDPC-based IR scheme; Rayleigh channel; cooperative IR scheme; cooperative relay system; cooperative transmitting diversity; error propagation; incremental redundancy scheme; linear optimization; optimal IR LDPC codes; soft encoding; three-node relay system; transmission efficiency; Encoding; Gaussian approximation; Optimization; Parity check codes; Relays; Throughput; Wireless communication; Alamouti code; IR; LDPC; cooperation; relay;

fLanguage

English

Publisher

ieee

Conference_Titel

Computational Problem-Solving (ICCP), 2011 International Conference on

Conference_Location

Chengdu

Print_ISBN

978-1-4577-0602-8

Electronic_ISBN

978-1-4577-0601-1

Type

conf

DOI

10.1109/ICCPS.2011.6089780

Filename

6089780