Oblivious sequential decode and forward cooperative strategies for the wireless relay channel

Evgeniy Braginskiy, Avi Steiner, Shlomo Shamai Shitz

Research output: Contribution to journalArticlepeer-review

Abstract

In a dynamic wireless network where a source terminal communicates with a destination, in presence of other users in the network, it is worthwhile to consider oblivious relaying strategies of a relay in close proximity to the source transmitter. The source-relay channel is assumed to be a fixed gain additive white Gaussian noise (AWGN) channel due to source-relay colocation. The source-destination and the relay-destination transmissions are subject to block flat fading dynamics. A perfect channel state information (CSI) at the respective receivers only is assumed. With the expected throughput as a performance measure, we incorporate a two-layer broadcast approach into a cooperative strategy based on the decode-and-forward scheme-Sequential Decode-and Forward (SDF). The broadcast approach splits the transmitted rate into superimposed layers, corresponding to a "bad" and a "good" channel states, allowing better adaptation to the actual channel conditions. The achievable rate expressions for the SDF strategy are derived under the broadcast approach for multiple settings including single user, multiple-input single-output (MISO) and the general relay setting using successive decoding technique, both numerically and analytically. Continuous broadcasting lower bounds are derived for the MISO and for the oblivious cooperation scenarios.

Original languageEnglish
Article number6279520
Pages (from-to)3228-3238
Number of pages11
JournalIEEE Transactions on Communications
Volume60
Issue number11
DOIs
StatePublished - 2012

Keywords

  • Broadcast approach
  • cooperative strategies
  • multi layer codes
  • oblivious relaying

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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