Optimal power allocation for relayed transmissions over rayleigh fading channels

Mazen O. Hasna*, Mohamed Slim Alouini

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

32 Scopus citations


Relayed transmission is a way to attain broader coverage by splitting the communication link from the source to the destination into several links/hops. One of the main advantages of this communication technique is that it distributes the use of power throughout the hops which means longer battery lives and lower interference introduced to the rest of the network. In this context, this paper investigates the optimal allocation of power over these links/hops for a given power budget. All hops are assumed to be subject to independent Raylelgh fading. The optimization criterion used is outage probability which is the probability that the link quality from source to destination falls below a certain threshold. Numerical results show that optimizing the allocation of power enhances the system performance, specially if the links are highly unbalanced in terms of their average fading power. They also show that non-regenerative systems with optimum power allocation can outperform regenerative systems with no power optimization.

Original languageEnglish (US)
Pages (from-to)2461-2465
Number of pages5
JournalIEEE Vehicular Technology Conference
Issue number4
StatePublished - 2003
Externally publishedYes
Event57th IEEE Semiannual Vehicular Technology Conference (VTC2003) - Jeju, Korea, Republic of
Duration: Apr 22 2003Apr 25 2003

ASJC Scopus subject areas

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


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