Self-interference cancellation in rf transceivers

A transceiver for a wireless broadcast station, the transceiver comprising:

• a transmitter for connecting to a transmitting antenna to broadcast a signal;
• and,
• a receiver for connecting to a receiving antenna to receive a remotely-transmitted signal;
• wherein the receiver comprises a digital processor for cancelling an interference signal from the transmitter, the processor configured to perform the acts of:
• filtering a frequency-domain spectrum R(k) of a transmitter-provided reference signal to estimate an interference spectrum;
• and
• subtracting the estimated interference spectrum from a spectrum Y(k) of a received signal to estimate a spectrum of the remotely-transmitted signal, wherein in operation the received signal is received from the receiving antenna;
• wherein the filtering comprises:
• estimating filter weights W(k) based, at least, on the frequency-domain spectra R(k) and Y(k), and
• applying a de-noising filter to the estimated filter weights.

A method for receiving remotely-transmitted signals by a transceiver of a wireless broadcast station, the transceiver comprising a transmitter connected to a transmit antenna and a receiver connected to a receive antenna, the method comprising:

• filtering a frequency-domain spectrum R(k) of a transmitter-provided reference signal to estimate an interference spectrum at the receiver;
• and
• subtracting the estimated interference spectrum from a spectrum Y(k) of a received signal to estimate a spectrum of the remotely-transmitted signal, wherein in operation the received signal is provided from the receive antenna;
• wherein the filtering comprises:
• estimating filter weights W(k) based, at least, on the frequency-domain spectrum R(k) and the spectrum Y(k) of the received signal, and
• applying a de-noising filter to the filter weights.