Cooperation over frequency-selective fading relay channels

Jun Hu, Tolga Duman

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We study information-rate calculations and codedcooperation strategies for relay channels with frequency-selective (FS) fading. We develop suitable channel trellises for the multiaccess and broadcast parts of the relay channel, and employ simulation-based techniques to calculate (approximate) ergodic information-rate bounds with FS Rayleigh fading. Our results show that frequency selectivity provides higher information rates than flat fading when the fading coefficients are known at the receiver, however, the improvement becomes marginal with increasing number of channel taps (when the overall signal to noise ratio is kept constant). Furthermore, we develop a distributed turbo-coding strategy and several decode-and-forward type detection/decoding schemes to ensure successful cooperative communication where the source and the relay may transmit simultaneously. We show that with suitable coding and iterative decoding, one can approach the approximate information-rate limits closely, and that detection schemes based on MMSE criterion provide a good performance/complexity trade-off.

Original languageEnglish (US)
Article number4712725
Pages (from-to)5072-5081
Number of pages10
JournalIEEE Transactions on Wireless Communications
Volume7
Issue number12
DOIs
StatePublished - Dec 2008

Fingerprint

Information Rates
Relay Channel
Frequency selective fading
Fading
Cooperative communication
Iterative decoding
Rayleigh fading
Decoding
Signal to noise ratio
Coding
Iterative Decoding
Cooperative Communication
Rayleigh Fading
Decode-and-forward
Minimum Mean Square Error
Selectivity
Broadcast
Relay
Receiver
Trade-offs

Keywords

  • Achievable information rates
  • Codes
  • Cooperative communication,
  • Frequency-selective fading
  • Relay channels
  • Turbo

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Science Applications
  • Applied Mathematics

Cite this

Cooperation over frequency-selective fading relay channels. / Hu, Jun; Duman, Tolga.

In: IEEE Transactions on Wireless Communications, Vol. 7, No. 12, 4712725, 12.2008, p. 5072-5081.

Research output: Contribution to journalArticle

Hu, Jun ; Duman, Tolga. / Cooperation over frequency-selective fading relay channels. In: IEEE Transactions on Wireless Communications. 2008 ; Vol. 7, No. 12. pp. 5072-5081.
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