APPARATUS AND METHOD FOR INTERFERENCE CANCELLATION

摘要

Embodiments of the present invention provide an apparatus and a method for interference cancellation. The apparatus includes: a splitter, configured to acquire a first transmit signal and a second transmit signal; a first circulator, configured to transmit the first transmit signal to an antenna and to send a to-be-processed signal to a combiner, where the to-be-processed signal includes a receive signal component and a self-interference signal component, the self-interference signal component corresponds to an interference signal generated due to that the antenna reflects the first transmit signal; a second circulator, configured to: transmit the second transmit signal to an equivalent load, and acquire a reference signal generated due to that the equivalent load reflects the second transmit signal, where an impedance of the equivalent load corresponds to an impedance of the antenna; and a combiner, configured to cancel the self-interference signal component according to the reference signal.

主权项

1. An apparatus for self-interference cancellation, wherein the apparatus comprises:
a splitter, configured to: perform splitting processing on a radio-frequency signal to acquire a first transmit signal and a second transmit signal, transmit the first transmit signal to a first port of a first circulator, and transmit the second transmit signal to a first port of a second circulator; the first circulator, configured to transmit the first transmit signal to an antenna through a second port; the antenna, configured to: transmit the first transmit signal, perform receiving processing to acquire a receive signal, and transmit the receive signal to the second port of the first circulator, wherein: the first circulator is further configured to send a to-be-processed signal through a third port to a combiner, wherein the to-be-processed signal comprises a receive signal component and a self-interference signal component, the receive signal component corresponds to the receive signal, and the self-interference signal component corresponds to an interference signal generated due to that the antenna reflects the first transmit signal; the second circulator, configured to: transmit the second transmit signal through a second port to an equivalent load, and acquire, through a third port, a reference signal generated due to that the equivalent load reflects the second transmit signal, wherein an impedance of the equivalent load corresponds to an impedance of the antenna; and the combiner, configured to cancel the self-interference signal component in the to-be-processed signal according to the reference signal.