Opportunistic multipath for bandwidth-efficient cooperative multiple access

Alejandro Ribeiro, Xiaodong Cai, Georgios B. Giannakis

Research output: Contribution to journalArticlepeer-review

28 Scopus citations


Within a new paradigm, where wireless user co-operation is viewed as a form of (opportunistic) multipath, we exploit the unique capabilities of direct-sequence spread spectrum transmissions in handling multipath to design a novel spectrally efficient protocol for wireless cooperative networks. We show how and why our proposed system achieves diversity without increasing bandwidth. After analyzing its performance, we deduce that user capacity can be significantly improved with respect to existing third generation cellular systems in the uplink.

Original languageEnglish (US)
Article number1687751
Pages (from-to)2321-2327
Number of pages7
JournalIEEE Transactions on Wireless Communications
Issue number9
StatePublished - Sep 2006


  • CDMA
  • Cooperative diversity
  • Diversity
  • Fading

ASJC Scopus subject areas

  • Engineering(all)
  • Computer Networks and Communications


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