公开(公告)号：US11057067B1

公开(公告)日：2021-07-06

申请号：US16846824

申请日：2020-04-13

Applicant: BAE Systems Information and Electronic Systems Integration Inc.

Inventor： Mark D. Hickle ,  Robert W. Sepanek ,  Mark E. Stuenkel

IPC: H04B3/20 ,  H04B1/10 ,  H04L5/14

Abstract: Techniques are disclosed for self-interference signal cancellation. A hybrid self-interference cancellation (SIC) circuit is configured to be operatively coupled to a transmitter and a receiver, and includes a tunable time domain filter in series with a tunable frequency domain filter. The tunable time domain filter is configured to generate a time-domain multipath cancellation signal based on a first radio signal transmitted by the transmitter at a first frequency while the receiver is receiving a second radio signal at a second frequency. The first and second frequencies can be the same or different and have similar or different power levels at the antennas. The tunable frequency domain filter, which is in series with the tunable time domain filter, is configured to generate a frequency-domain cancellation signal based on the first radio signal while the receiver is receiving the second radio signal.