LMS-based adaptive pre-distortion for enhanced power...

Details LMS-based adaptive pre-distortion for enhanced power... LMS-based adaptive pre-distortion for enhanced power...

2006-04-11

2006-04-11

Nguyen, Khanh V. (Department: 2817)

Amplifiers

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

C330S126000, C375S297000, C455S114300

Reexamination Certificate

active

07026873

ABSTRACT:
Systems and methods are disclosed to adaptively pre-distort a signal prior to being used by a non-linear circuit, such as a higher power amplifier (at transmit) or a low noise amplifier (at receive). The signal is compared with a feedback signal from the non-linear circuit and a metric is calculated and minimized. The input signal is adaptively changed, such as by varying tap coefficients, until the metric is sufficiently minimized, resulting in a pre-distorted signal that is substantially linear upon passing through the non-linear circuit.

REFERENCES:
patent: 5892397 (1999-04-01), Belcher et al.
patent: 6133789 (2000-10-01), Braithwaite
patent: 6356146 (2002-03-01), Wright et al.

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