Patent ID: 7957456
Filing Date: 2011-06-07
Classification: H03H,H04B,H04L

Abstract:
1. A method of selecting coefficients of a non-linear filter, the non-linear filter receiving a transmit signal and generating a non-linear replica signal of a transmit DAC of a transceiver, the method comprising: applying a plurality of periodic test pattern signals to inputs of the transmit DAC, the periodic test pattern signals comprising a stream of symbols; collecting receive symbols at an output of a receiver ADC of the transceiver resulting from the plurality of periodic test pattern signals; generating a non-linear map that provides a value for each of n consecutive symbols input to the transmit DAC; selecting coefficients of the non-linear filter based on the non-linear map; and summing the non-linear replica signal of the non-linear filter with the output of the receiver ADC, thereby reducing non-linear signal components of the transmit DAC of the transceiver.