Performance of dual hop relay systems with imperfect CSI

• Author / Creator

  Soysa, Madushanka Dinesh

• Wireless relays offer benefits such as coverage extension and improving robustness. Selection of relays may provide further benefits. The best relays are selected based
  on the channel state information. However, due to feedback or scheduling delays, in practise, the relay and/or the source node can have outdated channel state information. This outdated information will cause a performance degradation, and in this thesis its impact on dual-hop relay systems is investigated. The performance of amplify-and-forward (AF) relays under partial relay selection and opportunistic relay selection is analyzed. Both variable gain AF and fixed gain AF schemes are considered. Expressions for the outage probability and the average bit error rate and simplified high signal-to-noise ratio approximations are derived. The effect of parameters such as the number of relays, the rank of chosen relay, and the correlation
  between the delayed and current channel state information are analyzed.

• Subjects / Keywords

  • Wireless communications
  • Performance analysis
  • Cooperative relay

• Graduation date

  Fall 2011

• Type of Item

  Thesis

• Degree

  Master of Science

• DOI

  https://doi.org/10.7939/R3FD9F

• License

  This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.