Frequency/differential phase shift keying in the satellite mobile channel with a bandlimited filter

The authors analyse the performance of frequency/differential phase shift keying (2FSK/MDPSK) in the Satellite Mobile Channel (SMC) with a bandlimiting transmitter filter. They use two detectors in which the frequency symbol is detected by a limiter discriminator detector (LDD) and the phase symbol by a differential phase detector (DPD). The signal has a constant envelope. It is shown that this system is both power and bandwidth efficient when compared with other systems with constant envelope and non-coherent detection like LDPSK, GMSK and binary CPFSK.