Method and apparatus for predistortion training in an...

Details Method and apparatus for predistortion training in an... Method and apparatus for predistortion training in an...

2007-07-31

2007-07-31

Vo, Nguyen T. (Department: 2618)

Telecommunications

Transmitter

Noise or interference elimination

C375S297000

Reexamination Certificate

active

10958091

ABSTRACT:
A method and apparatus for predistortion training in an amplifier using predistortion is provided herein. Predistortion takes place by collecting a series of envelope errors and averaging the envelope errors for various amplitude regions. LUT values are modified based on a curve-fit to the average amplitude values for each amplitude region. By utilizing a curve-fitting technique, the pitfalls of modifying individual LUT coefficients is avoided. Particularly, because the errors are collected in relatively broad regions and then averaged, the importance of exact correlation between a measured error and a specific LUT entry is significantly lessened.

REFERENCES:
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patent: 6072364 (2000-06-01), Jeckeln et al.
patent: 6240144 (2001-05-01), Ha
patent: 6928122 (2005-08-01), Opas et al.
patent: 2005/0140438 (2005-06-01), Jin et al.
patent: 2376584 (2002-12-01), None
patent: WO01/80471 (2001-10-01), None

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