Relay assignment in multiple source-destination cooperative networks with limited feedback

Xuehua Zhang, Hamid Jafarkhani, Ali Ghrayeb, Mazen Hasna

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

Abstract

We consider in this paper relay assignment for cooperative systems with mutiple source-destination pairs. The objective here is to assign the relays to the source-destination pairs in a such way that all pairs would achieve the maximum diversity. Normally, for a network with mutiple source-destination pairs, none of the destinations can acquire the channel state information (CSI) of the entire network without feedback. To this end, we design a practical limited feedback strategy in conjunction with two relay assignment schemes, i.e., fullset selection and subset selection, which are based on maximizing the minimum end to end (E2E) signal to noise ratio (SNR) among all pairs. In this strategy, each destination acquires its signal-to-noise ratios (SNRs), quantizes them, and feeds them back to the relays. The relays construct the end-to-end (E2E) SNR matrix and select the relay assignment choice from all possible relay assignment permutations or only a subset of these permutations. We analyze the performance of these schemes over independent Rayleigh fading channels in terms of the worst E2E SNR. We investigate the asymptotic performance of the proposed schemes at high SNR. We show that relay assignment with quantized CSI can achieves the same first-order diversity as that of full CSI, but there is a second-order diversity loss. We also demonstrate that increasing the quantization levels yields performance that is close to that of having full knowledge of the CSI.

Original languageEnglish
Title of host publication2014 IEEE International Conference on Communications, ICC 2014
PublisherIEEE Computer Society
Pages5723-5728
Number of pages6
ISBN (Print)9781479920037
DOIs
Publication statusPublished - 2014
Event2014 1st IEEE International Conference on Communications, ICC 2014 - Sydney, NSW
Duration: 10 Jun 201414 Jun 2014

Other

Other2014 1st IEEE International Conference on Communications, ICC 2014
CitySydney, NSW
Period10/6/1414/6/14

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Keywords

  • Cooperative diversity
  • decode-and-forward
  • diversity order
  • limited feedback
  • relay assignment

ASJC Scopus subject areas

  • Computer Networks and Communications

Cite this

Zhang, X., Jafarkhani, H., Ghrayeb, A., & Hasna, M. (2014). Relay assignment in multiple source-destination cooperative networks with limited feedback. In 2014 IEEE International Conference on Communications, ICC 2014 (pp. 5723-5728). [6884234] IEEE Computer Society. https://doi.org/10.1109/ICC.2014.6884234