Patent ID: 7773967

Claim:
A method comprising: over sampling of the entire receiver passband to acquire the Intermodulation Product (IMP) source signals that can generate IMPs within the Signal of Interest (SOI), using these signals to generate a coherent complex I-Q channel estimates of the interference and, after phase and amplitude adjustment, using these estimates to cancel the SOI inband IMPs in the I and Q channels independently and simultaneously in near real time; generating estimates of 2 nd and 3 rd order IMP products, adjusting the phase and amplitude of the estimates and using the estimates to cancel the SOI inband IMPs on the I ad Q channels independently and simultaneously in real time or very near real time; sampling of the transmitter feed thru signal and blocking signals and computing the cross modulation products estimate and adjusting the phase and amplitude and using the estimate to cancel the SOI inband cross modulation products energy in real time or near real time in the I and Q channels of the receiver; using the cross modulation cancellation to cancel of the effects of the on chip transmitter feed thru to support building a single transceiver chip with full duplex operation with cancellation being done independently and simultaneously on the I and Q channels of the receiver; creation of an estimate of the DC offset in the receiver and adjusting the amplitude of the DC offset in a near real time closed loop fashion to cancel the DC offset in the I and Q channels independently and simultaneously and adjusting the rate of update to match system parameters.