Patent ID: 8494086

Claim:
An apparatus, comprising: a modulator for processing digital data thereby generating at least one codeword; a digital to analog converter (DAC) for processing the at least one modified codeword thereby generating a first analog signal; a synthesizer for providing at least one distortion term, based on the at least one codeword or at least one portion thereof, corresponding to at least one DAC operational characteristic; at least one of an amplifier and a filter for processing the first analog signal thereby generating a second analog signal; a signal of interest noise canceller for: processing a signal reference input and a signal plus noise input associated with the second analog signal thereby generating a power measurement signal; and selecting or calculating at least one of a variable gain tap and a variable phase tap in accordance with first steepest descent or dithering operations for use in generating the power measurement signal; and a power detector for measuring power of the power measurement signal; a controller for generating a control signal in accordance with second steepest descent or dithering operations based on the measured power; and an adapter for performing adaptation of at least one of filtering, gain, phase, and delay adjustment of the at least one distortion term based on the control signal for reducing distortion associated with at least one of the first analog signal and the second analog signal.