Double Differential Phase Shift Keying in (+1, -1) System

摘要

The single and double differential phase shift keying in (+1. -1) systems have been studied in this paper. The modulation and demodulation techniques of double differential phase shift keying (DDPSK) are discussed in detail. The hardware implementation is completely digital. It is easy and simple in realization as compared to conventional binary system. The probability of error is analysedin presence of additive white Gaussian noise for non-fading channels. The results so obtained have been graphically presented and compared with conventional binary system. The probability of error for slowly Rayleigh fading channel have also been derived and the results have been studied in detail. The (+1, -1) representation is well suited in the study of DDPSK.