Abstract | A novel simple receiver structure for M{ary dierential phase shift keying (MDPSK) transmission over
at Rayleigh fading channels without channel state information is proposed. We apply convolutional codes for error correction and bit{interleaving as appropriate means to combat the eects of fading. In the decoding the hard decisions of the Viterbi algorithm are fed back to enable a more reliable estimation of the current channel state. The convergence of iterative decoding with this decision{feedback dierential demodulation (iterative DF{DM) is examined. It turns out that the iterative DF{DM approach works well for target bit error rates which are usually of interest. A theoretical analysis of the associated cuto rate for error{free feedback shows remarkable gains in power eciency compared to conventional dierential demodulation, while the computational complexity of the decoding remains low. The results from information theory are in good agreement with the obtained simulation results. 1
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