Adaptive digital pre-distortion system

Details Adaptive digital pre-distortion system Adaptive digital pre-distortion system

2008-03-25

2008-03-25

Choe, Henry (Department: 2817)

Amplifiers

Hum or noise or distortion bucking introduced into signal...

C375S297000

Reexamination Certificate

active

07348844

ABSTRACT:
An adaptive Digital Pre-distortion System and a method for correcting especially power amplifier memory effects. In particular, the invention relates to an electronic circuit, for amplifying an input signal, comprising: a clipping unit for generating a signal, having a reduced peak-to-average power ratio by clipping the input signal; a pre-distorter for generating a pre-distorted signal, defined by an pre-distortion algorithm which is based on the amplifier model function; a representation unit for representing the amplifier model function; a non-linear processing unit, in particular a power amplifier, for generating a processed signal, in particular by amplifying said received pre-distorted signal; a time delay unit for compensating the processing time for the pre-distorted signal generating the delayed pre-distorted signal; and a time delay cascade for delaying the said delayed pre-distorted signal, at the integer sample clocks generating the signals.

REFERENCES:
patent: 5886573 (1999-03-01), Kolanek
patent: 6697436 (2004-02-01), Wright et al.
patent: 6794936 (2004-09-01), Hsu et al.
patent: 2003/0042978 (2003-03-01), Hsu et al.
patent: 2004/0155707 (2004-08-01), Kim et al.
Anding Zhu et al: “Adaptive volterra-based predistorter design for RF high power amplifiers.” Sep. 2001, pp. 100-105.

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