Amplitude-modulated transmitter with controlled carrier value

Details Amplitude-modulated transmitter with controlled carrier value Amplitude-modulated transmitter with controlled carrier value

1984-07-24

1986-12-30

Ng, Jin F.

Telecommunications

Transmitter

Amplitude modulation

455116, 332 31R, H04B 102

Patent

active

046335129

ABSTRACT:
An amplitude-modulated transmitter wherein the carrier value (T) is controlled in accordance with an improved HAPUG (controlled-carrier) method. Increased energy saving with simultaneous increase of the signal-to-noise ratio at the reception site is achieved by controlling the carrier along a static characteristic (SK) which begins, with a decreasing modulation level (P), with a residual carrier value (R), drops with increasing modulation levels to a minimum carrier value (T.sub.min) and passes into an ideal carrier-control characteristic only above a first level value (P.sub.1). Additional dynamic control results in a reduction in cross-over distortions.

REFERENCES:
patent: 4186346 (1980-01-01), Wysocki

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