Patent ID: 7003058

Claim:
A telecommunication system comprising: a transmitter at a site configured to modulate a first radio frequency (RF) carrier with a first set of data to form a transmit signal; a receiver at said site configured to demodulate a second set of data from a second RF carrier forming a receive signal; an orthomode transducer having at least two linear ports and a circular waveguide port, one of said linear ports connected as an input from said transmitter and another of said linear ports simultaneously connected as an output to said receiver; an antenna; a linear-to-circular polarizer connected to said circular waveguide port and connected to said antenna, said linear-to-circular polarizer configured so that a first linear polarization at said circular waveguide port results in a first circular polarization at said antenna and a second circular polarization at said antenna results in a second linear polarization at said circular waveguide port; and a cross polarization interference canceller including an interference detector coupled with a transmit splitter and a receive splitter, wherein the interference detector is configured to correlate the transmit signal with the receive signal to determine an interference with said receive signal due to said transmit signal and to output an interference amplitude and interference phase of said interference; a vector modulator controller configured to use said interference amplitude and interference phase output of said interference detector to calculate new vector modulator settings; a vector modulator connected to said transmit splitter and connected to said vector modulator controller, said vector modulator configured to use said transmit signal from said transmit splitter and said new vector modulator settings from said vector modulator controller to form an interference cancellation vector; and a summer connected to said vector modulator and connected to said receive splitter, said summer configured to form a clean receive signal by adding said interference cancellation vector from said vector modulator to said receive signal from said receive splitter, said summer adapted to provide said clean receive signal to a receiver.