Abstract
Low-density lattice codes (LDLCs) are known for their high decoding efficiency and near-capacity performance on point-to-point Gaussian channels. In this paper, we present a distributed LDLC-based cooperative relaying scheme for the multiple-access relay channel (MARC). The relay node decodes LDLC coded packets from two sources and forwards a network-coded combination to the destination. At the destination, a joint iterative decoding structure is designed to exploit the diversity gain as well as coding gain. For the LDLC-based network coding operation at the relay, we consider two alternative methods which offer a tradeoff between implementation complexity and performance, called superposition LDLC (S-LDLC) and modulo-addition LDLC (MA-LDLC). Simulation results show that the proposed scheme can provide more diversity gain and up to 6.2 dB coding gain when compared with non-cooperative LDLC coding and uncoded network-coded transmission.
Original language | English |
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Title of host publication | International Symposium on Turbo Codes and Iterative Information Processing, ISTC |
Publisher | IEEE Computer Society |
Pages | 254-258 |
Number of pages | 5 |
ISBN (Electronic) | 9781479959853 |
DOIs | |
Publication status | Published - 12 Nov 2014 |
Externally published | Yes |
Event | 2014 8th International Symposium on Turbo Codes and Iterative Information Processing, ISTC 2014 - Bremen, Germany Duration: 18 Aug 2014 → 22 Aug 2014 |
Conference
Conference | 2014 8th International Symposium on Turbo Codes and Iterative Information Processing, ISTC 2014 |
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Country | Germany |
City | Bremen |
Period | 18.8.14 → 22.8.14 |
ASJC Scopus subject areas
- Computational Theory and Mathematics
- Information Systems
- Theoretical Computer Science