Non-Data Aided Approach for Carrier Recovery and Modulation Identification of an M-ary PSK System

Abstract

Modulation identification and the recovery of the carrier lead to many applications in the digital communication system. Techniques developed so far for carrier recovery and modulation identification are all statistical. In this paper efforts are made to use a deterministic method rather than statistical. Zero crossing detection method is recommended for use to recover carrier from frequency and amplitude modulated systems. In this paper some modifications have been suggested for the application of the same system to make it useful for QAM and PSK as well. Based on the method presented by R. W. Wall, a modified Zero Crossing Detection algorithm has been used for carrier and phase extraction from an M-ary PSK (differential and non-differential) system. In addition, method has been developed for M-ary PSK system identification.