Abstract
In this paper, we develop a novel digital cooperative diversity transmission protocol for a two-source scenario by combining the two sources’ two classic decode-and-forward (DF) relaying steps and using 2L + 1 time slots to transmit L codewords from each source. Assuming the relays can perfectly decode their associated source messages, we give an information-theoretic average achievable capacity region for this transmission scheme. Through diversity-multiplexing tradeoff analysis, we show that our so called concurrent DF relaying protocol can effectively recover the multiplexing loss induced by the half-duplex operation in the relays, while still obtaining some diversity gain. Numerical results reveal our scheme offers significant performance advantages over the classic DF relaying protocols, especially for high signal-to-noise ratio (SNR) and large frame length L regime.
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Wang, C., Fan, Y. & Thompson, J.S. Recovering Multiplexing Loss through Concurrent Decode-and-Forward (DF) Relaying. Wireless Pers Commun 48, 193–213 (2009). https://doi.org/10.1007/s11277-007-9421-x
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DOI: https://doi.org/10.1007/s11277-007-9421-x