Patent ID: 8774314
Filing Date: 2014-07-08
Classification: H04B

Abstract:
1. A method for generating a transmit (TX) output signal in a communications transmitter, the method comprising: generating a baseband TX signal; up-converting and amplifying the baseband TX signal to generate the TX output signal; down-converting a portion of the TX output signal to generate a feedback signal; generating a reconstructed interference signal from the feedback signal; and subtracting the reconstructed interference signal from the baseband TX signal prior to up-converting and amplifying the baseband TX signal; the generating the reconstructed interference signal comprising: correlating a first signal derived from the feedback signal with a reference signal comprising the baseband TX signal to generate a correlation output, wherein the correlating comprises multiplying the first signal with the complex conjugate of the reference signal, and integrating the result of the multiplying; and processing the reference signal and the correlation output to generate the reconstructed interference signal.