Method and apparatus for generating transmitting wave

Details Method and apparatus for generating transmitting wave Method and apparatus for generating transmitting wave

1995-06-15

1996-04-09

Mis, David

Modulators

Phase shift keying modulator or quadrature amplitude modulator

375296, 455 63, H03C 106, H03C 300, H03C 500, H04L 2700

Patent

active

055065465

ABSTRACT:
In a method for generating a transmitting wave, a power supply voltage to be supplied to a transmission power amplifier is detected by a voltage detector, and a modulating signal is controlled so that a peak value of a modulated wave is lowered in accordance with a reduction amount of the power supply voltage. Since the peak value of the modulated wave input to the power amplifier is lowered, it is possible to obtain a transmitting wave without a distortion of the wave form or an increased bandwidth even when the reduction in the power supply voltage involves the lowering of the driving capability of the power amplifier.

REFERENCES:
patent: 4580111 (1986-04-01), Swanson

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