Cooperative performance and diversity gain of wireless relay networks

Shengbo Zhang*, Xiang Gen Xia, Jiangzhou Wang

*Corresponding author for this work

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Abstract

In this paper, the error rate performance and diversity gain of amplify-and-forward (AF) wireless relay networks are studied. The distributed space-time block code (DSTBC) in a synchronous relay network with multiple relay nodes is considered. The distributed linear dispersion code is used at the relays. The symbol (or codeword) error rate is studied in terms of upper and lower bounds through rigorous derivations, and the diversity gain of the DSTBC is derived, for any number of relay nodes. As a corollary, a necessary and sufficient condition is obtained for achieving full cooperative diversity. Arbitrary coding matrices at the relays, path loss and general linear power allocation are considered. Finally, the orthogonal frequency division multiplexing (OFDM)-based space-time transmission scheme in asynchronous cooperative networks is also discussed.

Original languageEnglish
Article number6311219
Pages (from-to)1623-1632
Number of pages10
JournalIEEE Journal on Selected Areas in Communications
Volume30
Issue number9
DOIs
Publication statusPublished - 2012
Externally publishedYes

Keywords

  • Space-time coding
  • asynchronous cooperative communication
  • cooperative diversity
  • error probability
  • wireless relay networks

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Zhang, S., Xia, X. G., & Wang, J. (2012). Cooperative performance and diversity gain of wireless relay networks. IEEE Journal on Selected Areas in Communications, 30(9), 1623-1632. Article 6311219. https://doi.org/10.1109/JSAC.2012.121005