Predistortion for high power amplifiers

Details Predistortion for high power amplifiers Predistortion for high power amplifiers

1997-09-26

2000-08-29

Bost, Dwayne D.

Telecommunications

Transmitter

Having harmonic radiation suppression

455126, 330149, H04B 104, H03F 126

Patent

active

061120626

ABSTRACT:
A predistorter for linear amplification of a complex modulated signal has an input stage, an envelope detector having at least one fast diode and a capacitor at an output for measuring an amplitude of an RF signal, first and second differentiators for taking first and second derivatives with respect to time; and a predistorter controller for adjusting an attenuator and phase shifter based upon the derivatives.

REFERENCES:
patent: 4194154 (1980-03-01), Kahn
patent: 4554514 (1985-11-01), Whartenby et al.
patent: 4672327 (1987-06-01), Wittlinger
patent: 5105445 (1992-04-01), Karam et al.
patent: 5489875 (1996-02-01), Cavers
patent: 5493252 (1996-02-01), Takai
patent: 5699383 (1997-12-01), Ichiyoshi
patent: 5760646 (1998-06-01), Belcher et al.
patent: 5886572 (1999-03-01), Myers et al.

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