Patent ID: 8638836

Claim:
A circuit capable of mitigating transmit path leakage into a receive path during simultaneous transmit and receive operation of a transceiver, comprising: a first bandpass modulator for modulating a baseband orthogonal transmit signal to produce a RF modulated signal; a power amplifier operatively coupled to the first bandpass modulator to amplify the RF modulated signal and produce a RF amplified modulated signal; a duplexer operatively coupled to the power amplifier to pass the RF amplified modulated signal to an antenna and to pass a RF receive signal from the antenna; an equalizer for adjusting the baseband orthogonal transmit signal based on tuning feedback from a baseboard demodulated compensated receive signal and produce a baseband compensation signal; a second bandpass modulator operatively coupled to the equalizer to RF modulate the baseband compensation signal from the equalizer and produce a RF compensation signal; a RF subtraction circuit operatively coupled to the duplexer and the second bandpass modulator to determine a difference between a RF receive signal and the RF compensation signal and produce a RF compensated receive signal and; a band pass demodulator operatively coupled to the subtraction circuit and the equalizer to demodulate the RF compensated receive signal and produce the baseband demodulated compensated receive signal for both feedback tuning the equalizer and for representing a received signal.