Optimum power allocation for cooperative systems with orthogonal space-time transmissions

Paul A. Anghel, Mostafa Kaveh, Zhi Quan Luo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

We investigate the rate maximizing power allocation strategy for a system where the source and the decode-andforward (DF) relays cooperate by utilizing a distributed spacetime block coding strategy. Under the assumption that all transmitters have perfect knowledge of the link gains, we analyze two limit cases - the case of no-collaboration among relays and the case of ideal collaboration among relays - and we provide a polynomial-time algorithm that computes the maximum achievable rate for the distributed space-time coding system despite the fact that the optimization problem is not convex and it belongs to a class of problems with variational inequality constraints. Due to the orthogonal structure of the space-time block code designs, the proposed algorithm can also be used, with minor modifications, in the computation of the optimum power allocation for the case of DF relays with orthogonal transmissions.

Original languageEnglish (US)
Title of host publicationProceedings - 2006 IEEE International Symposium on Information Theory, ISIT 2006
Pages2067-2071
Number of pages5
DOIs
StatePublished - Dec 1 2006
Event2006 IEEE International Symposium on Information Theory, ISIT 2006 - Seattle, WA, United States
Duration: Jul 9 2006Jul 14 2006

Publication series

NameIEEE International Symposium on Information Theory - Proceedings
ISSN (Print)2157-8101

Other

Other2006 IEEE International Symposium on Information Theory, ISIT 2006
CountryUnited States
CitySeattle, WA
Period7/9/067/14/06

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