THE NONCOHERENT EXTRACTION OF THE TIME SYNCHRONIZATION SIGNAL FOR DEMODULATION OF CONTINUOUS PHASE FREQUENCY MODULATION SIGNALS

Abstract

Discrete signals of with continuous phase frequency modulation (CPFM) are characterized by a constant envelope, absence of phase jumps, and high values of power and frequency efficiency. All these advantages in a combination to spectral compactness and small level of out-of-band emissions define wide application of CPFM signals in systems of land and satellite communication. In article, the algorithm and structure of non-coherent clock extractor are developed for demodulation of CPFM signals. The method is simple in realization and is based on application of non-coherent procedures of processing of the signals, which are not demanding use of advance information about frequency and phase of FM signal.