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On the Performance of Selective Decode and Forward Relaying over Imperfectly Known Fading Relay Channels

Authors:
Ali Zarei Ghanavati
Daniel Lee

Keywords: cooperative communication; fading; channel estimation

Abstract:
In this paper, we investigate the effects of imperfect channel estimation on the performance of a Selective-Decode-and-Forward (SDF) relay-assisted communication system. In the system studied, a pilot symbol-assisted modulation (PSAM) scheme is used along with a channel estimation scheme based on minimum mean square error (MMSE). In particular, we derive an approximate expression for the bit error probability (BEP) in the presence of channel estimation error for the SDF cooperative protocol. Numerical simulations are presented to show that the derived approximate BEP expression is very close to the actual BEP. We also provide power-allocation that optimally assigns power constraint to training and data transmission phases to minimize the BEP.

Pages: 173 to 178

Copyright: Copyright (c) IARIA, 2013

Publication date: July 21, 2013

Published in: conference

ISSN: 2308-4219

ISBN: 978-1-61208-284-4

Location: Nice, France

Dates: from July 21, 2013 to July 26, 2013