Predistortion system and method using analog feedback loop for l

Details Predistortion system and method using analog feedback loop for l Predistortion system and method using analog feedback loop for l

1997-09-30

1999-09-28

Mottola, Steven

Amplifiers

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

455126, H03F 126

Patent

active

059594993

ABSTRACT:
The present invention provides a linearization system (100) and method (700, 800) for generating a predistorted drive signal for a nonlinear transmission path. The linearization includes: A) an analog feedback system (39), coupled to a computation unit, for determining, during a training mode, a complex error signal that linearizes the nonlinear transmission path and wherein, in an operation mode, the analog feedback system is disabled; and B) a computation unit (1), coupled to the analog feedback system and coupled to receive a complex input signal and the complex error signal, for determining, during the training mode, complex predistortion gain coefficients and, during the operation mode, generating the predistorted drive signal for the nonlinear transmission path, wherein the analog feedback system and computation unit are interconnected by interface circuitry.

REFERENCES:
patent: 5049832 (1991-09-01), Cavers
patent: 5507014 (1996-04-01), Wray et al.
patent: 5524285 (1996-06-01), Wray et al.
patent: 5524286 (1996-06-01), Chiesa et al.
patent: 5732333 (1998-03-01), Cox et al.
patent: 5748678 (1998-05-01), Valentine et al.
"Adaptive Linearisation Using Pre-Distortion" by Michael Faulkner, Thomas Mattsson, Warren Yates. IEEE 1990.

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