A circuit comprising: a first channelization circuit splitting an outgoing digital signal on a channel by channel basis and separately outputting each channel, the outgoing digital signal further being converted to an analog signal and transmitted at a transmitter (185,285,385); a plurality of estimator circuits (120,220,320), a different one of the estimator circuits being for each different output by the first channelization circuit, wherein each estimator circuit models nonlinear signal distortion from the transmitter at a receiver (186,286,386) for its respective channel based on an analysis of the outgoing digital signal for its respective channel; a plurality of mixers (130,230,330), a different one of the mixers being for each different channel, wherein each mixer mixes an output of the estimator circuit for its respective channel with a frequency offset signal for its respective channel and shifts the estimator circuit output to an intermediate frequency offset representing a difference between transmit frequency and receive frequency; a second channelization circuit splitting a digitized incoming signal on a channel by channel basis and separately outputting each channel, the digitized incoming signal being a digitized version of an incoming signal received at the receiver; a plurality of subtractors (160,260,360), a different one of the subtractors being for each different output of the second channelization circuit, wherein each subtractor is coupled to a mixer for its respective channel and subtracts the frequency shifted estimator circuit output for its respective channel from the channelized digitized incoming signal for its respective channel outputted by the second channelization circuit. a first channelization circuit splitting an outgoing digital signal on a channel by channel basis and separately outputting each channel, the outgoing digital signal further being converted to an analog signal and transmitted at a transmitter (185,285,385); a plurality of estimator circuits (120,220,320), a different one of the estimator circuits being for each different output by the first channelization circuit, wherein each estimator circuit models nonlinear signal distortion from the transmitter at a receiver (186,286,386) for its respective channel based on an analysis of the outgoing digital signal for its respective channel; a plurality of mixers (130,230,330), a different one of the mixers being for each different channel, wherein each mixer mixes an output of the estimator circuit for its respective channel with a frequency offset signal for its respective channel and shifts the estimator circuit output to an intermediate frequency offset representing a difference between transmit frequency and receive frequency; a second channelization circuit splitting a digitized incoming signal on a channel by channel basis and separately outputting each channel, the digitized incoming signal being a digitized version of an incoming signal received at the receiver; a plurality of subtractors (160,260,360), a different one of the subtractors being for each different output of the second channelization circuit, wherein each subtractor is coupled to a mixer for its respective channel and subtracts the frequency shifted estimator circuit output for its respective channel from the channelized digitized incoming signal for its respective channel outputted by the second channelization circuit.