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International Journal of Antennas and Propagation
Volume 2017, Article ID 1862391, 9 pages
Research Article

Outage Analysis of Partial Relay Selection Schemes with Feedback Delay and Channel Estimation Errors in Nonidentical Rayleigh Fading Channels

1Broadcasting & Telecommunications Media Research Laboratory, Electronics & Telecommunications Research Institute, Daejeon 305-700, Republic of Korea
2Department of Electrical, Electronic and Control Engineering, Hankyong National University, Anseong 456-749, Republic of Korea

Correspondence should be addressed to In-Ho Lee;

Received 29 April 2016; Accepted 10 November 2016; Published 3 January 2017

Academic Editor: Larbi Talbi

Copyright © 2017 Jung-Bin Kim and In-Ho Lee. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper investigates the impact of the channel estimation error and outdated channel state information (CSI) on the outage performances of partial relay selection (PRS) and efficient partial relay selection (EPRS). Considering imperfect channel estimation and outdated CSI with decode-and-forward (DF) relaying strategy, closed-form expressions for exact outage probabilities and asymptotic outage probabilities for PRS and EPRS are provided assuming independent and nonidentically distributed Rayleigh fading channels. Numerical investigations verify the analytical expression for outage probability and show how much performance is degraded by the channel estimation errors and the feedback delay that causes the outdated CSI.