Power allocation in cooperative networks using differential space-time codes

Behrouz Maham, Are Hjørungnes

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

4 Citations (Scopus)

Abstract

Estimating channel state information (CSI) in the fast fading conditions is very challenging. In this paper, a simple structure for cooperative diversity in decode-and-forward mode is examined, in which the transmitter, the relay and the receiver do not require to know CSI. In this scheme, transmission of information is done in a two phase process. In the first phase, differential modulated signals are radiated from the source. After decoding the received signal in the relay side, the source and the relay collectively send information using differential space-time codes. The optimum power allocation in a sense of minimizing pairwise error probability (PEP) in high SNR scenarios has been obtained using an analytical method. An interesting property of the optimum point is that it is independent of the channel statistics and the position of the relay, which improves its feasibility in the future communication systems. Numerical simulations verify the analytical results.

Original languageEnglish
Title of host publicationProceedings - 2007 IEEE International Symposium on Information Theory, ISIT 2007
Pages1916-1919
Number of pages4
DOIs
Publication statusPublished - Dec 1 2007
Event2007 IEEE International Symposium on Information Theory, ISIT 2007 - Nice, France
Duration: Jun 24 2007Jun 29 2007

Publication series

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

Other

Other2007 IEEE International Symposium on Information Theory, ISIT 2007
CountryFrance
CityNice
Period6/24/076/29/07

Keywords

  • Cooperation
  • Decode-and-forward
  • Differential space-time codes
  • Power control

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Information Systems
  • Modelling and Simulation
  • Applied Mathematics

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  • Cite this

    Maham, B., & Hjørungnes, A. (2007). Power allocation in cooperative networks using differential space-time codes. In Proceedings - 2007 IEEE International Symposium on Information Theory, ISIT 2007 (pp. 1916-1919). [4557501] (IEEE International Symposium on Information Theory - Proceedings). https://doi.org/10.1109/ISIT.2007.4557501