Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.phycom.2008.08.001
Title: Cooperative space-time block coding with amplify-and-forward strategy: Exact bit error probability and adaptive forwarding schemes
Authors: He, J.
Kam, P.Y. 
Keywords: Amplify-and-forward
Bit error probability
Cooperative space-time block coding
Issue Date: Sep-2008
Source: He, J.,Kam, P.Y. (2008-09). Cooperative space-time block coding with amplify-and-forward strategy: Exact bit error probability and adaptive forwarding schemes. Physical Communication 1 (3) : 209-220. ScholarBank@NUS Repository. https://doi.org/10.1016/j.phycom.2008.08.001
Abstract: Cooperative space-time block coding (STBC) is a distributed way to exploit spatial diversity. Because of its simplicity, the amplify-and-forward (AF) strategy is often used at relays. However, the exact performance of this strategy is not available in the existing works. Therefore, in the first part of this paper, we analyze the performance of cooperative STBC with the AF strategy. Exact bit error probabilities (BEP) are derived in closed form for three existing protocols. Since the AF strategy simply forwards the signals at the relays, the noise at the relay is also forwarded to the destination, and it degrades the received signals from both the relay and the source, due to the receiver structure of STBC. In the second part of this paper, we examine the effect of the forwarded noise and propose a condition under which the relay should stop forwarding the signals. Based on this condition, adaptive forwarding schemes for cooperative STBC are proposed. The performances of these schemes are studied and the exact BEP's are also obtained in closed form. Finally, the energy efficiencies of these adaptive schemes are discussed. © 2008 Elsevier B.V. All rights reserved.
Source Title: Physical Communication
URI: http://scholarbank.nus.edu.sg/handle/10635/55446
ISSN: 18744907
DOI: 10.1016/j.phycom.2008.08.001
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