Amplifiers – Hum or noise or distortion bucking introduced into signal...
Reexamination Certificate
2005-04-26
2005-04-26
Nguyen, Khanh V. (Department: 2817)
Amplifiers
Hum or noise or distortion bucking introduced into signal...
C375S296000, C455S126000
Reexamination Certificate
active
06885241
ABSTRACT:
This invention is about a novel estimation technique for generating a predistortion function to compensate for the AM-AM and AM-PM non-linear conversion distortions of non-linear power amplifiers or non-linear circuits. Based on the cumulative type of power amplifier output envelope, a non-parametric baseband predistortion function is derived. The non-parametric approach avoids any model mismatch. In addition, the technique does not need to demodulate the input signal. Furthermore, it minimizes the effect of the power amplifier non-linearity and significantly improves the system performance
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Caron Mario
Huang Xinping
Freedman & Associates
Her Majesty the Queen in right of Canada as represented by the
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