Iterative noncoherent block detection of coded MPSK for cooperative relay systems

Abstract

Maximum likelihood (ML) noncoherent block detection techniques are investigated for block-coded MPSK modulation in cooperative decode-and-forward relay systems over slow fading channels. A decision-directed iterative Viterbi algorithm (IVA) is derived for a suboptimal ML noncoherent detection. Simulation results show that the IVA can approach the error performances of the exhaustive detection method but at a lower complexity.