Patent ID: 11895522
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An interference cancellation method comprising:
sending, by a first device, a first signal to a second device, wherein the first signal comprises a first transmit signal and a first pilot signal, and sending a first self-interference signal, generated when the first transmit signal is sent to the second device, to a receive end of the first device, where the first transmit signal and the first pilot signal use different frequency bands;
obtaining, by the first device, a second signal comprising the first self-interference signal, a second pilot signal, and a second receive signal from the second device, wherein the second pilot signal is obtained after the first pilot signal undergoes a channel jitter, wherein frequency bands used by the first transmit signal and the second receive signal completely or partially overlap, and wherein the second receive signal and the second pilot signal use different frequency bands;
extracting, by the first device, jitter information of the first self-interference signal based on the first pilot signal and the second pilot signal;
reconstructing, by the first device, a second self-interference signal based on the first transmit signal and the jitter information, to obtain a cancellation signal of the first self-interference signal; and
canceling, by the first device, the first self-interference signal from the second receive signal based on the cancellation signal.