Trellis coding of non-coherent multiple symbol full response M-ary CPFSK with modulation index 1/M

The paper introduces a trellis coded modulation (TCM) scheme for non-coherent multiple full response M-ary CPFSK with modulation index 1/M. A proper branch metric for the trellis decoder is obtained by employing a simple approximation of the modified Bessel function for large signal to noise ratio (SNR). Pairwise error probability of coded sequences is evaluated by applying a linear approximation to the Rician random variable. Examples are presented for trellis codings of non-coherent binary CPFSK by using the Ungerboeck's (1982) set partitioning method. Asymptotic upper bounds on bit error probability are evaluated for the given coded systems, and simulation results are also presented.<
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