Modulator-demodulator for four level double amplitude modulation

Details Modulator-demodulator for four level double amplitude modulation Modulator-demodulator for four level double amplitude modulation

1980-12-22

1984-02-21

Grimm, Siegfried H.

Modulators

Amplitude modulator

Nonlinear device controlled by modulating signal

329 50, 329105, 329135, 332 41, 332 42, 375 42, 375 96, H03C 100, H03D 100

Patent

active

044333102

ABSTRACT:
A modulator in which an input train of digital pulses is encoded to produce two encoded trains of digital pulses which are used to respectively modulate two out of phase carrier components. The two modulated carrier components are combined to produce a modulated output signal. A demodulator recovers carrier and clock signals from the modulated signal and combines these with the modulated signal to recover the input train of digital pulses.

REFERENCES:
patent: 3204029 (1965-08-01), Groff et al.
patent: 3740655 (1973-06-01), Dickey
patent: 4015222 (1977-03-01), Werner
patent: 4236042 (1980-11-01), Leitch

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