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 t.sub.0, 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.