Digital analog signal demodulator

Details Digital analog signal demodulator Digital analog signal demodulator

1991-07-18

1992-03-17

Pascal, Robert J.

Demodulators

Amplitude modulation demodulator

329353, 329363, H03D 100

Patent

active

050972227

ABSTRACT:
There is disclosed a system and method for demodulating an analog signal using digital conversion of the analog signal. In one embodiment the incoming modulated signal is digitally sampled and a calculation is made as to both the short term and long term energy of the digitized version of the analog signal. The deviation between the short and long term energy levels is used to determine the amount of modulation of the incoming analog signal. An analog demodulated signal is then reconstructed from the digitized deviation calculations. In an alternate embodiment, a digital signal processor is used to derive the demodulated signal.

REFERENCES:
patent: 4298985 (1981-11-01), Ballard et al.
patent: 4989219 (1991-01-01), Gerdes et al.

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