Modulated signal transmission system compensated for nonlinear a

Details Modulated signal transmission system compensated for nonlinear a Modulated signal transmission system compensated for nonlinear a

1993-07-01

1994-08-16

Grimm, Siegfried H.

Modulators

Frequency shift keying modulator or minimum shift keying...

332103, 332107, 332124, 332144, 332160, 375 51, 375 57, 375 58, 375 60, 455 63, H04L 2549

Patent

active

053390547

ABSTRACT:
In a modulated signal transmission system operable in response to an input digital signal of a baseband to produce a modulated signal through a nonlinear amplifier, a nonlinear converter is controlled by a control signal generator to compensate for not only a nonlinear distortion but also a linear distortion. The control signal generator is given a difference signal between a linearly detected signal and the input digital signal to which an estimated linear distortion is added by a linear filter having filter coefficients controlled by a filter coefficient estimator. An additional nonlinear converter is located prior to the linear filter. Alternatively, the linear filter may be located after the nonlinear converter.

REFERENCES:
patent: 5105445 (1992-04-01), Karam et al.

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