Patent ID: 8743745

Claim:
A single channel full duplex wireless communication system, comprising: a processor; a transmitter coupled to the processor, the transmitter transmitting a transmission signal via a transmission path; wherein a portion of the transmission signal is leaked; a receiver coupled to the processor, the receiver receiving a received signal, the received signal including the leakage from the transmission signal, the receiver including at least one combining element and at least one reception path, wherein the transmitter and the receiver utilize one channel, at the same time, to transmit and receive said transmission and received signals with no separation between frequencies used for the transmitting and the receiving, wherein the at least one combining element is coupled to an input of the receiver and wherein the at least one reception path is coupled to an output of the receiver, wherein the receiver produces an output signal, the output signal including self-interference caused by the leakage from the transmission signal; a secondary transmission path coupled to the processor and to the at least one combining element; and the processor estimating a first transfer function, wherein the first transfer function has an input comprising the transmission signal fed to the input of the transmission path, and wherein the output of the first transfer function is fed to an input of the secondary transmission path to produce a first intermediate signal at an output of the secondary transmission path, and wherein a first cancellation signal is generated based upon the first intermediate signal, the first cancellation signal being subsequently combined with the received signal in the at least one combining element so as to reduce the self-interference in the output signal from the receiver.