Distortion compensating apparatus and method

Details Distortion compensating apparatus and method Distortion compensating apparatus and method

2006-08-15

2008-08-26

Bocure, Tesfaldet (Department: 2611)

Pulse or digital communications

Transmitters

Antinoise or distortion

C375S297000, C332S124000, C332S160000

Reexamination Certificate

active

07418058

ABSTRACT:
The present apparatus includes: distortion amount detector which detects the amount of distortion of an output signal of the amplifier; parameter holder; parameter corrector which corrects a parameter held in the parameter holder in such a manner that the distortion amount detected by the distortion amount detector is improved; controller which controls frequency components to be subjected to distortion amount detection that is performed by the distortion amount detector, based on the distortion amounts of a plurality of different frequency components of the output signal of the amplifier and on specification values relating to the distortion amounts. This arrangement makes it possible to set (control) appropriate distortion data measurement point (frequency component to be detected) according to multiple specification values (for example, ACLR specification values) relating to the distortion amount.

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European Search Report dated May 28, 2008, from the corresponding European Application.
Ernesto G. Jeckeln, et al. “A New Adaptive Predistortion Technique Using Software-Defined Radio and DSP Technologies Suitable for Base Station 3G Power Amplifiers” IEEE Transactions on Microwave Theory and Techniques, vol. 52, No. 9, Sep. 1, 2004, pp. 2139-2147.

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