Software radio frequency canceller

摘要

A full-duplex RF communication system and corresponding methods use digital adaptive filters for interference cancellation. As provided, the techniques allow full-duplex radio frequency communication without frequency-, time-, or code-division multiplexing and without the use of hardware RF cancellers. Such techniques may be useful for wireless communication, such as cellular communication, radio communication, broadcasting, short-range point-to-point communication, wireless sensor networks, and wireless computer networks.

主权项

1. A method comprising:
receiving an analog primary signal from a radio receiver input port, an antenna, or a receiver front end; receiving an analog reference signal locally generated and transmitted by a radio transmitter, wherein the radio transmitter is co-located with the radio receiver; converting the analog primary signal into a digital primary signal; converting the analog reference signal into a digital reference signal; and processing the digital reference signal with a dual loop digital adaptive filter, wherein a first adaptive filter of the dual loop digital adaptive filter uses the output of a second adaptive filter of the dual loop digital adaptive filter as one of the inputs for determining filter weights, to provide an output; and subtracting the direct output of the first adaptive filter of the dual loop digital adaptive filter from the digital primary signal to generate a digital cancelled signal.