Optimization of relay selection in DF cooperative systems with outdated CSI

L. Fei, J. Zhang, Q. Gao, X.-H. Peng

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

Abstract

Relay selection has been considered as an effective method to improve the performance of cooperative communication. However, the Channel State Information (CSI) used in relay selection can be outdated, yielding severe performance degradation of cooperative communication systems. In this paper, we investigate the relay selection under outdated CSI in a Decode-and-Forward (DF) cooperative system to improve its outage performance. We formulize an optimization problem, where the set of relays that forwards data is optimized to minimize the probability of outage conditioned on the outdated CSI of all the decodable relays’ links. We then propose a novel multiple-relay selection strategy based on the solution of the optimization problem. Simulation results show that the proposed relay selection strategy achieves large improvement of outage performance compared with the existing relay selection strategies combating outdated CSI given in the literature.

Original languageEnglish
Title of host publicationFuture communication, information and computer science
Subtitle of host publicationproceedings of the international conference on Future Communication, Information and Computer Science, Beijing, China, 22–23 May 2014
EditorsDawei Zheng
PublisherCRC Press
Pages45-50
Number of pages6
ISBN (Electronic)978-1-315-75229-7
ISBN (Print)978-1-138-02653-7
Publication statusPublished - 2015
EventInternational Conference on Future Communication, Information and Computer Science - Beijing, China
Duration: 22 May 201423 May 2014

Conference

ConferenceInternational Conference on Future Communication, Information and Computer Science
Abbreviated titleFCICS 2014
CountryChina
CityBeijing
Period22/05/1423/05/14

Keywords

  • cooperative communication
  • outage performance
  • outdated CSI
  • relay selection

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  • Cite this

    Fei, L., Zhang, J., Gao, Q., & Peng, X-H. (2015). Optimization of relay selection in DF cooperative systems with outdated CSI. In D. Zheng (Ed.), Future communication, information and computer science: proceedings of the international conference on Future Communication, Information and Computer Science, Beijing, China, 22–23 May 2014 (pp. 45-50). CRC Press.