Pulse or digital communications – Repeaters – Testing
Patent
1988-03-10
1989-08-01
Griffin, Robert L.
Pulse or digital communications
Repeaters
Testing
455142, 329 1, H04L 2706
Patent
active
048539449
ABSTRACT:
Traditionally, the parameters evaluation and characterization of amplitude modulation(AM), frequency modulation(FM) and phase modulation(.phi.M) signals are achieved utilizing analog test and measurement instruments. The advancement of high speed analog to digital converters and digital signal processing techniques have made this digital AM/FM/.phi.M demodulator an accurate, repeatable and cost effective alternative for the test and measurement of various modulation waveforms. This invention illustrates the design of the digital AM/FM/.phi.M demodulator.
REFERENCES:
patent: 4050022 (1977-09-01), McFadyen et al.
patent: 4135158 (1979-01-01), Parmet
patent: 4455665 (1984-06-01), Kromer, III
patent: 4470147 (1984-09-01), Goatcher
patent: 4726069 (1988-02-01), Stevenson
patent: 4731796 (1988-03-01), Masterton et al.
Lo Pei-hwa
Matesich Ardis M.
Sokolich James M.
Allied-Signal Inc.
Chin Stephen
Griffin Robert L.
Massung Howard G.
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