Digital phaselock demodulator

Details Digital phaselock demodulator Digital phaselock demodulator

1980-09-15

1982-08-17

Grimm, Siegfried H.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

328155, 329107, 329122, 375 94, H03K 906

Patent

active

043452116

ABSTRACT:
A digital phaselock demodulator suitable for demodulating a variety of phase or frequency modulated signals including an FM'd VOR signal component. A digital phase detector receives the modulated input signal and a feedback signal, and outputs demodulated signal. Two sets of digital words of different word rates are provided wherein one set is reversible in order as a function of phase between input and feedback signals. Digital word comparison occasions the feedback signal.

REFERENCES:
patent: 3781695 (1973-12-01), Jackson
patent: 3883817 (1975-05-01), Cliff
patent: 4019153 (1977-03-01), Cox, Jr. et al.
Blasche, "Analysis of a First Order Phase Locked Loop in the Presence of Gaussian Noise", Technical Memorandum NASA 46, Mar. 1977.
Chamberlin, "Digital Correlation Detector for Low-Cost OMEGA Navigation", NASA Technical Memorandum No. 19, Feb. 1976.
Pasternack et al., "Analysis and Synthesis of a Digital Phase-Locked Loop for FM Demodulation", The Bell System Technical Journal, Dec. 1968, pp. 2207-2237.

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