Spatially coupled LDPC coding in cooperative wireless networks

D.N.K. Jayakody, V. Skachek, B. Chen

Research output: Contribution to journalArticleAcademicpeer-review

8 Citations (Scopus)
187 Downloads (Pure)

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
Number of pages11
JournalEurasip Journal on Advances in Signal Processing
DOIs
Publication statusPublished - 18 Feb 2016

Keywords

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

Fingerprint

Dive into the research topics of 'Spatially coupled LDPC coding in cooperative wireless networks'. Together they form a unique fingerprint.

Cite this