Relay channel with orthogonal components and structured interference known at the source

Kagan Bakanoglu, Elza Erkip, Osvaldo Simeone, Shlomo Shamai Shitz

Research output: Contribution to journalArticlepeer-review

Abstract

A relay channel with orthogonal components in which the destination is affected by an interference signal that is non-causally available only at the source is studied. The interference signal has structure in that it is produced by another transmitter communicating with its own destination. Moreover, the interferer is not willing to adjust its communication strategy to minimize the interference. Knowledge of the interferer's signal may be acquired by the source, for instance, by exploiting HARQ retransmissions on the interferer's link. The source can then utilize the relay not only for communicating its own message, but also for cooperative interference mitigation at the destination by informing the relay about the interference signal. Proposed transmission strategies are based on partial decode-and-forward (PDF) relaying and leverage the interference structure. Achievable schemes are derived for discrete memoryless models, Gaussian and Ricean fading channels. Furthermore, optimal strategies are identified in some special cases. Finally, numerical results bring insight into the advantages of utilizing the interference structure at the source, relay or destination.

Original languageEnglish (US)
Article number6457364
Pages (from-to)1277-1289
Number of pages13
JournalIEEE Transactions on Communications
Volume61
Issue number4
DOIs
StatePublished - 2013

Keywords

  • Relay channel
  • dirty paper coding
  • interference mitigation
  • interference structure
  • partial decode-and-forward

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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