Robust FFT-based block demodulation in the presence of symbol synchronization jitter using symmetric differential phase shift keying (SDPSK)

In this paper a new binary differential phase encoding technique is suggested. The suggested approach, symmetric differential phase shift keying (SDPSK), is designed to alleviate the symbol synchronization difficulties which optimum DPSK may encounter while maintaining the same probability of error in the absence of time jitter. Also an economical and compact fast Fourier transform (FFT)-based realization of the block demodulators for both optimum DPSK and SDPSK encoded signals is suggested. Theoretical developments along with simulation results are provided