Orthogonal space time block coding for two-way wireless relay networks under imperfect synchronization.
ABSTRACT In this paper distributed space time block codes (D-STBCs) are applied within an asynchronous two-way cooperative wireless relay network using two relay nodes. A parallel interference cancelation (PIC) detection scheme with low structural and computational complexity is applied at the terminal nodes in order to overcome the effect of imperfect synchronization among the cooperative relay nodes. Simulation results based on end-to-end bit error rate (BER) illustrate that the PIC detection algorithm can mitigate the inter symbol interference (ISI) introduced by the asynchronism, and that only a small number of iterations is necessary within the PIC detection to improve the system performance.
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ABSTRACT: A parallel interference cancellation (PIC) based signal detection scheme is proposed for asynchronous bidirectional relay networks using analog network coding (ANC) with differential modulation. It is shown that the proposed scheme can effectively suppress the inter-symbol interference (ISI) in the received mixed signals at the relay node in the first transmission time-slot and offers significant performance improvement when neither the source nodes nor the relay knows the channel state information, and still retains a low computational complexity.IEEE Communications Letters 06/2013; 17(6):1132-1135. DOI:10.1109/LCOMM.2013.050313.130107 · 1.46 Impact Factor