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

Claim 19:
20. A microwave transmission system comprising:
a first device, a second device, and an intermediate frequency cable connecting the first device and the second device, wherein the first device is an indoor unit (IDU), and the second device is an outdoor unit (ODU); or the first device is an ODU, and the second device is an IDU;
the first device is configured to send a first signal to the second device, wherein the first signal comprises a first transmit signal and a first pilot signal, and send 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;
the second device is configured to send a second receive signal to the first device by using the intermediate frequency cable;
the first device is further configured to obtain a second signal, wherein the second signal comprises the first self-interference signal, a second pilot signal, and the 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;
the first device is further configured to extract jitter information of the first self-interference signal based on the first pilot signal and the second pilot signal;
the first device is further configured to reconstruct 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
the first device is further configured to cancel the first self-interference signal from the second receive signal based on the cancellation signal.