Performance Analysis of DDPSK Receiver for Applications in IoT Systems

We present an analytical approach in the analysis of the symbol error rate performance of the receiver for double differential phase-shift keying (DDPSK) signals transmitted over generalized fading channel. The analysis is applicable in modern Internet-of-Things (IoT) wireless systems where multipath fading and shadowing appear simultaneously, and where coherent detection is not applied. We use Fourier series method for determining symbol error probability in detecting multilevel DDPSK signals. We give the comparison of the error rate values for DDPSK and differential phase-shift keying (DPSK) formats in the presence of the carrier frequency offset caused by Doppler shift. This comparison is performed for different fading and shadowing severities and some conclusions are derived related to the application of these two modulation formats.