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In this paper, we propose a distributed space-time trellis code (DSTTC) structure over cooperative nodes with imperfect relay re-transmission. We provide detailed system design and analyze the error performance in Rayleigh fading channels when the relay channel is prone to errors. We compare the results to the equivalent non-cooperative one-hop link from the source to the destination and normalize...
This paper proposes an optimal relay selection criteria based on the location of the relay (0 ≤ λ ≤ 1) relative to source and destination in the cooperative coded system. The proposed optimization algorithm employs distributed turbo product coding technique with hard and soft decoding. It is shown that the link quality depends on the location of the relay which in turn affects overall system Bit Error...
In this paper, we investigate the performance of frequency domain equalization in conjunction with Soft Decision (SD) Viterbi decoding in the Orthogonal Frequency Division Multiplexing (OFDM) systems. Specifically, we compare the performance of two frequency domain equalization methods, one using complete phase and magnitude equalization of complex Quadrature Amplitude Modulated (QAM) symbols, while...
We propose new joint distributed Space-Time Block Code (STBC)-Distributed Turbo Product Code (DTPC) by generating the vertical parity on the relay and transmitting it to the destination using STBC on the source and relay. We tested our proposed system in a fast fading environment on the three channels connecting the three nodes in the cooperative network. Results show an overall gain that can reach...
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