LDPC coding with soft information relaying in cooperative wireless networks

Dushantha N.K. Jayakody, Mark F. Flanagan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

11 Citations (Scopus)

Abstract

This paper investigates soft information relaying (SIR) for low-density parity-check (LDPC) coded transmission in wireless networks. We introduce a new scheme for soft parity symbol generation at the relay, which features two key strategies: a two-step soft parity generation process, and a prescaling technique. The two-step soft parity generation procedure is designed to allow efficient relay processing, while yielding an overall (i.e., destination) parity-check matrix structure with desirable properties. The pre-scaling method prevents the amplitudes of generated soft symbols successively converging to zero, as happens with some existing soft forwarding methods. Finally, we propose an appropriate LLR former at the destination which is tailored to the proposed soft parity generation technique. Simulation results demonstrate that the proposed relay protocol yields an improved BER performance compared to competitive schemes proposed in the literature.

Original languageEnglish
Title of host publication2013 IEEE Wireless Communications and Networking Conference, WCNC 2013
Pages4317-4322
Number of pages6
DOIs
Publication statusPublished - 2013
Externally publishedYes
Event2013 IEEE Wireless Communications and Networking Conference, WCNC 2013 - Shanghai, China
Duration: 7 Apr 201310 Apr 2013

Conference

Conference2013 IEEE Wireless Communications and Networking Conference, WCNC 2013
CountryChina
CityShanghai
Period7.4.1310.4.13

Fingerprint

Wireless networks
Network protocols
Processing

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Jayakody, D. N. K., & Flanagan, M. F. (2013). LDPC coding with soft information relaying in cooperative wireless networks. In 2013 IEEE Wireless Communications and Networking Conference, WCNC 2013 (pp. 4317-4322). [6555272] https://doi.org/10.1109/WCNC.2013.6555272

LDPC coding with soft information relaying in cooperative wireless networks. / Jayakody, Dushantha N.K.; Flanagan, Mark F.

2013 IEEE Wireless Communications and Networking Conference, WCNC 2013. 2013. p. 4317-4322 6555272.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Jayakody, DNK & Flanagan, MF 2013, LDPC coding with soft information relaying in cooperative wireless networks. in 2013 IEEE Wireless Communications and Networking Conference, WCNC 2013., 6555272, pp. 4317-4322, 2013 IEEE Wireless Communications and Networking Conference, WCNC 2013, Shanghai, China, 7.4.13. https://doi.org/10.1109/WCNC.2013.6555272
Jayakody DNK, Flanagan MF. LDPC coding with soft information relaying in cooperative wireless networks. In 2013 IEEE Wireless Communications and Networking Conference, WCNC 2013. 2013. p. 4317-4322. 6555272 https://doi.org/10.1109/WCNC.2013.6555272
Jayakody, Dushantha N.K. ; Flanagan, Mark F. / LDPC coding with soft information relaying in cooperative wireless networks. 2013 IEEE Wireless Communications and Networking Conference, WCNC 2013. 2013. pp. 4317-4322
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