Abstract: Systems, methods, and other embodiments associated with echo cancellation are described. According to one embodiment, a method uses two signals from a transmitter as input to a look-up table to generate a non-linear echo cancellation signal. The non-linear echo cancellation signal is applied to a receiving path to reduce non-linear echo distortion on the receiving path based at least in part on the current signal and the previous signal.

Abstract: A method of compensating for arbitrary nonlinearities associated with a received signal includes receiving a plurality of samples of the signal having at least one in-band region and at least one out-of-band region, generating a plurality of compensated signal values based on the plurality of samples and a plurality of respective compensation values, applying a transform function to the plurality of compensated signal values to generate a frequency-domain representation of the plurality of compensated signal values, and updating at least one of the plurality of compensation values using the generated frequency-domain representation of the signal to reduce energy associated with the at least one out-of-band region of the signal.