Demodulators – Amplitude modulation demodulator – Having specific distortion – noise or other interference...
Patent
1976-06-03
1977-05-31
Kominski, John
Demodulators
Amplitude modulation demodulator
Having specific distortion, noise or other interference...
325346, 329104, 178 88, H03D 306
Patent
active
040272656
ABSTRACT:
A new and improved apparatus and method for demodulation of quaternary phase shift keyed (QPSK) data, particularly unbalanced QPSK, with phase adjustment of the output of a phase-locked loop local oscillator to reduce sensitivity to amplitude variations internal to the demodulator.
REFERENCES:
patent: 3594651 (1971-07-01), Wolejsza, Jr.
patent: 3787775 (1974-01-01), Lanning
patent: 3806815 (1974-04-01), Fletcher et al.
patent: 3838350 (1974-09-01), Ewanus
patent: 3878475 (1975-04-01), Okano
patent: 3973212 (1976-08-01), Walloch
patent: 3983499 (1976-09-01), Tan
Bradfield, III Sydney P.
Kobayashi Herbert S.
Kominski John
Manning John R.
Matthews Marvin F.
McClenny Carl O.
The United States of America as represented by the Administrator
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