SYMBOL TIMING RECOVERY FOR A CLASS OF CONSTANT ENVELOPE SIGNALS
E. Satorius, James J. Mulligan · 2005
A critical component in any communication system is timing recovery at the receiver. In this paper, we examine different techniques for recovering symbol timing with special emphasis on the class of constant envelope, continuous phase FSK (CPFSK) signals. These signals are of interest because they are bandwidth efficient and do not impose high peak power transmitter requirements. Although techniques for equalizing these types of signals have been extensively investigated (e.g., constant modulus blind demodulation), symbol timing recovery has not been as thoroughly analyzed. In this paper, we present a performance analysis of envelope-derived timing recovery as applied to CPFSK modulation. The results of this analysis will provide useful guidelines for the development of constant envelope, timing recovery systems.