Rapid acquisition shift keyed signal demodulator

A rapid acquisition carrier demodulator comprising:

• (a) a shift keyed phase detector having an input for receiving a signal including data shift keyed modulated on a carrier, a local oscillator connected to supply a reference frequency to said phase detector, and an in-phase channel and a quadrature channel each providing a signal generated from the received signal and each including data at differing phase error angles relative to the local oscillator reference frequency;
• (b) first combining means coupled to said phase detector to receive the in-phase and quadrature channel signals and generate a plurality of phase error signals differing from each other by a fixed phase angle;
• (c) low pass filter means coupled to pass the plurality of phase error signals and substantially reduce noise prevalent in the plurality of phase error signals;
• and
• (d) second combining means coupled to said phase detector and said low pass filter means to receive the in-phase and quadrature channel signals and the plurality of phase error signals for combining the signals to provide a data signal.