Patent ID: 11923888
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Telecommunications (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 8:
9. A full-duplex self-interference cancellation apparatus, comprising:
a time reversal filter, configured to time reversal-filter a sending signal; and
a first self-interference reconstruction module, comprising a processor configured to perform self-interference reconstruction on a time reversal-filtered sending signal, to obtain a first-level self-interference reconstruction signal;
a second self-interference reconstruction module, configured to directly perform self-interference reconstruction on the sending signal, to obtain a second-level self-interference reconstruction signal, wherein the second self-interference reconstruction module comprises a fixed delay line, a variable attenuator, and a phase shifter, and two ends of the variable attenuator are respectively connected to the fixed delay line and the phase shifter; and
a combiner, configured to perform, based on the first-level self-interference reconstruction signal and the second-level self-interference reconstruction signal, self-interference cancellation on a radio frequency signal received by a receive antenna.