A convolutional-based distributed coded cooperation scheme for relay channels

Mohamed Elfituri, Walaa Hamouda, Ali Ghrayeb

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

In this paper, we consider a coded cooperation diversity scheme that is suitable for L-relay channels that operate in the decode-forward mode. The proposed scheme is based on convolutional coding, where each codeword of the source node is partitioned into two frames that are transmitted in two phases. In the first phase, the first frame is broadcast from the source to the relays and destination. In the second phase, the second frame is transmitted on orthogonal subchannels from the source and relay nodes to the destination. Each relay is assumed to be equipped with a cyclic redundancy check (CRC) code for error detection. Only these relays (whose CRCs check) transmit in the second phase. Otherwise, they keep silent. At the destination, the received replicas (of the second frame) are combined using maximal ratio combining. The entire codeword, which comprises the two frames, is decoded via the Viterbi algorithm. We analyze the proposed scheme in terms of its probability of bit error and outage probability. Explicit upper bounds are obtained, assuming M-ary phase-shift keying transmission. Our analytical results show that the full diversity order is achieved, provided that the source-relay link is more reliable than the other links. Otherwise, the diversity degrades. However, in both cases, it is shown that it is possible to achieve substantial performance improvements over noncooperative coded systems. Several numerical and simulation results are presented to demonstrate the efficacy of the proposed scheme.

Original languageEnglish
Pages (from-to)655-669
Number of pages15
JournalIEEE Transactions on Vehicular Technology
Volume58
Issue number2
DOIs
Publication statusPublished - 2009
Externally publishedYes

Fingerprint

Relay Channel
Relay
Viterbi algorithm
Phase shift keying
Error detection
Outages
Redundancy
Maximal Ratio Combining
Viterbi Algorithm
Error Detection
Decode
Outage Probability
Error Probability
Vertex of a graph
Replica
Phase Shift
Broadcast
Efficacy
Coding
Entire

Keywords

  • Channel coding
  • Coded cooperation
  • Error probability
  • Fading channels
  • Outage event probability
  • Pairwise error probability
  • Relay channels

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Aerospace Engineering
  • Automotive Engineering
  • Computer Networks and Communications
  • Applied Mathematics

Cite this

A convolutional-based distributed coded cooperation scheme for relay channels. / Elfituri, Mohamed; Hamouda, Walaa; Ghrayeb, Ali.

In: IEEE Transactions on Vehicular Technology, Vol. 58, No. 2, 2009, p. 655-669.

Research output: Contribution to journalArticle

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