MSK Demodulator frequency acquistion apparatus and method

Details MSK Demodulator frequency acquistion apparatus and method MSK Demodulator frequency acquistion apparatus and method

1980-07-14

1982-06-22

Grimm, Siegfried H.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

329122, 331 12, 331 17, 331 25, H04L 2722

Patent

active

043365000

ABSTRACT:
A phase shift keyed (PSK) demodulator includes a closed loop wherein a phase error signal is generated to control a voltage controlled oscillator (VCO) to track the carrier frequency of an input signal for demodulation. A frequency discriminator is incorporated with the PSK demodulator to provide a frequency error voltage which is also applied to the VCO to improve the tracking of the carrier frequency by substantially eliminating false locks and removing the dependence of the apparatus on the modulation of the received signal.

REFERENCES:
patent: 3768030 (1973-10-01), Brown et al.
patent: 4092606 (1978-05-01), Ryan
patent: 4188589 (1980-02-01), Brown et al.

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