Patent ID: 8412133
Filing Date: 2013-04-02
Classification: H03F

Abstract:
1. A method of determining coefficients of a pre-distorter for compensation of distortion of a signal by an amplifier, the method comprising: sampling an input signal upstream of the amplifier to generate a plurality of input samples; sampling an output signal downstream of the amplifier to generate a plurality of output samples, each of the plurality of output samples corresponding to a respective input sample; selecting input samples from the plurality of generated input samples based on frequency domain analysis of a set of samples comprising the selected set of input samples and a previously selected set of input samples; updating the previously selected set of input samples with the selected input samples to generate an updated selected set of input samples; and determining updated coefficients of the pre-distorter based on at least some of the input samples in the updated selected set of input samples and corresponding output samples.