Amplifier having distortion compensation and base station for ra

Details Amplifier having distortion compensation and base station for ra Amplifier having distortion compensation and base station for ra

1996-07-30

1999-02-09

Britton, Howard

Telecommunications

Transmitter

With feedback of modulated output signal

455295, H04B 70005

Patent

active

058706682

ABSTRACT:
A amplifier having distortion compensation is employed as a power amplifier for amplifying a linear modulated signal or a low noise amplifier for amplifying a linear modulated signal. The amplifier having distortion compenssation includes an amplifier circuit for amplifying an input signal; an error detecting circuit for obtaining an error signal between the input signal to and an output signal from the amplifier circuit; a coefficient generating circuit for generating compensation coefficients to compensate distortion components of characteristics of the amplifier circuit, based on the error signal according to an adaptive type algorithm; a first outputting circuit for outputting a generated compensation coefficient corresponding to the input signal; and a multiplying circuit for multiplying the generated compensation coefficient to the input signal and inputting a multiplied coefficient to the amplifier circuit.

REFERENCES:
patent: 5507017 (1996-04-01), Whitmarsh
patent: 5574992 (1996-11-01), Cygan
patent: 5579342 (1996-11-01), Crozier
patent: 5722056 (1998-02-01), Horowitz
Adaptive Filter Theory Second Edition 1991 by Prentice-Hall, Inc.; Simon Haykin; Chaps. 9 and 13.

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