Demodulation system for a multi-level multi-phase superposition-

Details Demodulation system for a multi-level multi-phase superposition- Demodulation system for a multi-level multi-phase superposition-

1977-03-21

1978-06-13

Grimm, Siegfried H.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

325346, 325349, 329105, 329112, 329122, 329135, H03D 320

Patent

active

040951871

ABSTRACT:
A demodulation system for demodulating a multi-level, multi-phase, superposition-modulated carrier wave is disclosed. The demodulation system includes a phase-detecting circuit and first and second demodulator circuits. The first demodulator circuit discriminates the output of the phase-detecting circuit to reproduce a first demodulated signal. The second demodulator circuit squares the output of the phase-detecting circuit and discriminates the squared output with respect to a given level. The resulting signal is then combined with the output of the first demodulator circuit in Exclusive-OR logic to obtain a second demodulated signal.

REFERENCES:
patent: 4039961 (1977-08-01), Ishio et al.

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