Impact of imperfect channel estimation on the performance of amplify-and-forward relaying
IEEE Transactions on Wireless Communications
Cooperative diversity over fading channels with impulsive noise
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Cooperative diversity in the presence of impulsive noise
IEEE Transactions on Wireless Communications
Achieving exponential diversity in wireless multihop systems with regenerative relays
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
International Journal of Autonomous and Adaptive Communications Systems
Power Allocation for Amplify-and-Forward Relaying with Correlated Shadowing
Wireless Personal Communications: An International Journal
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Optimum power allocation is a key technique to realize the full potentials of relay-assisted transmission promised by the recent information-theoretic results. In this paper, we present a comprehensive framework for power allocation problem in a single-relay scenario taking into account the effect of relay location. In particular, we aim to answer the two fundamental questions: (Q1) How should the overall transmit power be shared between broadcasting and relaying phases?; (Q2) In the relaying phase, how much power should be allocated to relay-to- destination and source-to-destination links? The power allocation problem is formulated to minimize a union bound on the bit error rate (BER) performance assuming amplify-and-forward relaying. We consider both orthogonal and non-orthogonal cooperation protocols. Optimized protocols demonstrate significant performance gains over their original versions which assume equal sharing of overall transmit power between the source and relay terminals as well as between broadcasting and relaying phases. It is observed that optimized virtual (distributed) antenna configurations are able to demonstrate a BER performance as close as 0.4 dB within their counterpart co-located antenna configurations.