On iterative phase trellis based noncoherent detection of coded MPSK in a noisy phase regime

A family of interleaved systems for communicating over the AWGN channel with noisy phase is investigated. Each system comprises convolutional or turbo error correcting code (ECC), interleaver, BPSK or QPSK modulation and differential encoding. The receiver performs jointly and iteratively the ECC decoding and the channel demodulation in the presence of unknown phase utilizing a Markovian model of the noisy phase. The systems exhibit good performance with various levels of phase noise. The convolutional code outperforms the turbo code slightly over AWGN channels due to the limited capability of the iterative algorithm in this setting; the turbo code is superior in bursty channels, modeling for example a block erasures fading environment