System and method of low power demodulation of continuous phase modulated waveforms

摘要

A radio system demodulates a continuous phase modulation waveform with a pulse count demodulator. The use of a pulse count demodulator reduces the receiver complexity and reduces power consumption, which makes such a system well suited for hand held or mobile units. The pulse count demodulator delays the CPM signal by a time increment to, and subtracts the delayed signal from the original signal creating a difference signal. The difference signal is rectified and low pass filtered resulting in an average signal representing the phase change. In non-square wave CPM signals, the signal is first clipped removing the amplitude information.