A digital signal processing demodulator with a wide frequency acquisition range

Abstract

A demodulator capable of variable baud rate (f/sub b/) operation satisfies the requirements for a forward error correcting decoder for satellite communication systems such as VSAT systems. A new method of frequency acquisition, called swept automatic frequency control has a wide f/sub b/-independent acquisition range and prevents false locking of the carrier recovery circuit. The authors have evaluated such a demodulator and confirm that it performs satisfactorily.<>