Spatially coupled LDPC coding in cooperative wireless networks

Dushantha Nalin K. Jayakody, Vitaly Skachek, Bin Chen

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

This paper proposes a novel technique of spatially coupled low-density parity-check (SC-LDPC) code-based soft forwarding relaying scheme for a two-way relay system. We introduce an array-based optimized SC-LDPC codes in relay channels. A more precise model is proposed to characterize the residual noise on the soft symbols, using a pre-calculated look-up table at the destination. This requires less signaling overhead compared to previous soft noise modeling techniques. We also introduce a variance correction factor to provide a rectification to the equivalent total noise variance at the destination. Finally, we propose an appropriate log likelihood ratio (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 bit error rate (BER) performance compared to competing schemes proposed in the literature.

Original languageEnglish
Article number20
Pages (from-to)1-11
Number of pages11
JournalEurasip Journal on Advances in Signal Processing
Volume2016
Issue number1
DOIs
Publication statusPublished - 1 Dec 2016
Externally publishedYes

Keywords

  • Decode and forward
  • LDPC codes
  • Network coding
  • Relay channels

ASJC Scopus subject areas

  • Signal Processing
  • Hardware and Architecture
  • Electrical and Electronic Engineering

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