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

Claim 0:
1. A full-duplex self-interference cancellation method, comprising:
time reversal-filtering a sending signal and feeding a time reversal-filtered sending signal into a first self-interference reconstruction module, to obtain a first-level self-interference reconstruction signal;
directly feeding the sending signal into a second self-interference reconstruction module, to obtain a second-level self-interference reconstruction signal; and
performing, 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,
wherein the second self-interference reconstruction module comprises a fixed delay line, a variable attenuator, and a phase shifter, two ends of the variable attenuator are respectively connected to the fixed delay line and the phase shifter, and the sending signal is directly fed into the fixed delay line and sequentially passes through the variable attenuator and the phase shifter, to obtain the second-level self-interference reconstruction signal.