Performance analysis of a new transmission scheme for multi-relay channels

Mohamed Elfituri, Walaa Hamouda, Ali Ghrayeb

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

4 Citations (Scopus)

Abstract

Cooperative diversity provides reliable communications between nodes in a network through relay nodes. In this paper, we introduce a new transmission protocol for relay fading channels. We examine the performance of the proposed protocol using both the amplify-and-forward (AF) and decode-and-forward (DF) modes. Our results prove that using this protocol, one can achieve full spatial diversity at full rate. We also show that our protocol with M relays is equivalent to a delay diversity scheme with M + 1 transmit antennas. At the receiver side, a maximum likelihood sequence detector is used to recover the transmitted symbols. Comparing our protocol with existing ones, we noted large performance degradations in all protocols when the relay is operating in the DF mode where detection errors exist. This is different from the AF mode, where diversity is always maintained and only a SNR loss is incurred (relative to the ideal case of error-free relay transmission). This, in turn, suggests that even with the large cost/complexity involved in the DF mode, the ensuing performance may be poor compared to the AF mode. Motivated by this fact, we obtain a bit-error rate upper bound for a multi-relay configuration where all relay nodes operate in the AF mode. At high signal-to-noise ratio (SNRs), this error bound is shown to be tight when compared to simulation results.

Original languageEnglish
Title of host publication2006 IEEE Workshop on Signal Processing Systems Design and Implementation, SIPS
Pages34-38
Number of pages5
DOIs
Publication statusPublished - 2006
Externally publishedYes
EventIEEE Workshop on Signal Processing Systems, SIPS 2006 - Banff, AB, Canada
Duration: 2 Oct 20064 Oct 2006

Other

OtherIEEE Workshop on Signal Processing Systems, SIPS 2006
CountryCanada
CityBanff, AB
Period2/10/064/10/06

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ASJC Scopus subject areas

  • Signal Processing
  • Control and Systems Engineering
  • Electrical and Electronic Engineering

Cite this

Elfituri, M., Hamouda, W., & Ghrayeb, A. (2006). Performance analysis of a new transmission scheme for multi-relay channels. In 2006 IEEE Workshop on Signal Processing Systems Design and Implementation, SIPS (pp. 34-38). [4161821] https://doi.org/10.1109/SIPS.2006.352551