Frequency demodulation system

Details Frequency demodulation system Frequency demodulation system

1979-06-13

1981-09-22

Moore, David K.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

375 89, H03D 300

Patent

active

042912750

ABSTRACT:
A demodulator for demodulating an encoded signal comprising first and second predetermined patterns of contiguous signal segments of frequencies f.sub.1 and f.sub.2. A first signal processing means comprises first correlation means including a reference signal which is correlative with the signal segments of frequency f.sub.1 of said first and second patterns to produce a first and second output signals when correlation occurs. A second signal processing means comprising second correlation means including a reference signal which is correlative with the signal segments of frequency f.sub.2 of said first and second patterns to produce third and fourth output signals when correlation occurs. The said first and third output signals are combined to produce a first resultant signal indicating correlation with said first pattern of signal segments and said second and fourth output signals are combined to produce a second resultant signal indicating correlation with said second pattern of signal segments.

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