Effect of Feedback Delay on Downlink Amplify-and-Forward Relaying with Beamforming

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Suraweera, Himal A, Tsiftsis, Theodoros A, Karagiannidis, G. K and Faulkner, Michael (2009) Effect of Feedback Delay on Downlink Amplify-and-Forward Relaying with Beamforming. In: GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference. IEEE, Piscataway, NJ, 2346-2351 .


In relay networks, partial channel state information at the transmitter due to feedback delay can severely degrade the beamforming performance. In this paper, the decremental effect of transmit beamforming with feedback delay on the downlink performance of a two hop Amplify-and-Forward (AF) relay network over Rayleigh fading channels is investigated. The source is equipped with multiple antennas while the relay and the destination has a single antenna. We have derived closed-form expressions for the outage probability, probability density function of the received signal-to-noise ratio (SNR) at the destination and the average bit error rate (BER). To gain further insights, outage probability and average BER approximations at high SNR are also presented. Numerical results supported by simulations are provided to illustrate the decremental effects feedback delay on the performance of the considered AF relay system.

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Proceedings of a meeting held 30 November - 4 December 2009, Honolulu, Hawaii, USA

Item type Book Section
URI https://vuir.vu.edu.au/id/eprint/5578
DOI 10.1109/GLOCOM.2009.5426305
Official URL http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumb...
ISBN 9781424441471 (print) 9781424441488 (online)
Subjects Historical > Faculty/School/Research Centre/Department > Centre for Telecommunications and Micro-Electronics (CTME)
Historical > FOR Classification > 1005 Communications Technologies
Historical > SEO Classification > 8901 Communication Networks and Services
Keywords ResPubID17959, relay networks, channel state information, amplify-and-forward, signal-to-noise ratio, bit error rate, antennas
Citations in Scopus 11 - View on Scopus
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