MULTIPLE-SYMBOLS DIFFERENTIAL DETECTION OF GMSK

A new differential detection algorithm using multiple-symbol observati on interval for the demodulation of a GMSK signal is described. This t echnique is based on a maximum-likelihood sequence estimation of the t ransmitted phases rather than symbol-by-symbol detection. Upper and lo wer bounds on the bit error probability of the described detector in t he case of an AWGN channel are derived. Comparisons with the classical coherent detection algorithm of a CPM signal show that the proposed d etection algorithm is quite attractive.