SYSTEMS AND METHODS FOR FREQUENCY INDEPENDENT ANALOG SELF-INTERFERENCE CANCELLATION

摘要

A system and method for analog self-interference cancellation that includes receiving an RF transmit signal of a full-duplex radio; frequency downconverting the RF transmit signal to an IF transmit signal; transforming the IF transmit signal into an IF self-interference signal using an IF analog self-interference cancelling circuit; frequency upconverting the IF self-interference signal to an RF self-interference signal; and combining the RF self-interference signal with an RF receive signal of the full-duplex radio.

主权项

1. A system for analog self-interference cancellation comprising:
a transmit coupler, communicatively coupled to an RF transmit signal of a full-duplex wireless communication system, that samples the RF transmit signal to create a sampled RF transmit signal having a first RF carrier frequency; a frequency downconverter that converts the sampled RF transmit signal to an IF transmit signal having an IF carrier frequency, wherein the IF carrier frequency is less than the first RF carrier frequency; an IF analog self-interference canceller that transforms the IF transmit signal to an IF self-interference signal; a frequency upconverter that converts the IF self-interference signal to an RF self-interference signal having a second RF carrier frequency; and a receive coupler, communicatively coupled to an RF receive signal of the full-duplex wireless communication system, that combines the RF self-interference signal with the RF receive signal.