Methods for cancellation of radio interference in wireless communication systems

摘要

A full duplex radio includes self-interference cancellation circuitry for reducing self-interference. The self-interference cancellation circuitry may receive analog radio frequency signals that are to be transmitted by an antenna, and downconvert and digitize the signals to provide a digital baseband signal for processing, for example by an adaptive filter. The filtered signal may be converted to an analog signal and applied in an analog portion of a receive chain of a receiver of the full duplex radio. Preferably the analog signal is applied in the receive chain after low noise amplification of received signals of interest.

主权项

1. A method of cancelling self-interference in a full duplex radio, comprising:
converting a radio frequency (RF) analog output signal of a transmission chain of the radio to a digital baseband signal; digitally filtering the digital baseband signal using a digital adaptive filter; converting the digitally filtered signal to an analog signal; combining the analog signal with a received signal from another radio in an analog portion of a receive chain of the radio.