PREMODULATION FILTER FOR GENERATING IN COMBINATION WITH A FM TRANSMITTER A GENERALIZED TAMED FREQUENCY SIGNAL

摘要

ABSTRACT:A transmitter for transmitting a carrier whosefrequency is modulated by pseudo five-level signals. Inorder to obtain a simple receiver and an improved signal-to-noise ratio, a substantially three-level signal isgenerated in the transmitter at the detection instantst = (2m-1)T/2 by means of a pre-modulation filter.