METHOD FOR REDUCING ADJACENT-CHANNEL INTERFERENCE AND RELAY DEVICE

摘要

A method for reducing adjacent-channel interference includes: obtaining, by a receiver, a first analog signal from a radio frequency front-end of a transmitter, where the first analog signal is a signal transmitted by the transmitter to the outside, and the signal transmitted by the transmitter to the outside forms a self-interference signal at an antenna of the receiver; performing analog-to-digital conversion on the first analog signal so as to obtain a first digital signal; receiving, by the receiver, a second analog signal, where the second analog signal includes a wanted signal and the self-interference signal; performing analog-to-digital conversion on the second analog signal so as to obtain a second digital signal; and performing digital cancellation on the second digital signal and the first digital signal so as to obtain a wanted digital signal of the second digital signal.

主权项

1. A relay device, comprising:
a transmitter comprising a first radio frequency front-end module; and a receiver comprising a second radio frequency front-end module, a receive channel module, a feedback channel module, and a digital cancellation module, wherein:
the first radio frequency front-end module is connected to the feedback channel module of the receiver, and is configured to transmit a first analog signal to the feedback channel module, wherein the first analog signal is a signal transmitted by the transmitter to the outside, and the signal transmitted by the transmitter to the outside forms a self-interference signal at an antenna of the receiver,the second radio frequency front-end module is configured to receive a second analog signal, wherein the second analog signal comprises a wanted signal and the self-interference signal, and transmit the second analog signal to the receive channel module,the receive channel module is connected to the second radio frequency front-end module, and is configured to receive the second analog signal transmitted by the second radio frequency front-end module, perform analog-to-digital conversion on the second analog signal to obtain a second digital signal, and transmit the second digital signal to the digital cancellation module, wherein the second digital signal comprises a wanted signal component and a self-interference signal component,the feedback channel module is connected to the first radio frequency front-end module, and is configured to receive the first analog signal transmitted by the first radio frequency front-end module, perform preprocessing and analog-to-digital conversion on the first analog signal to obtain a first digital signal, and transmit the first digital signal to the digital cancellation module, andthe digital cancellation module is separately connected to the receive channel module and the feedback channel module, and is configured to receive the second digital signal transmitted by the receive channel module and the first digital signal transmitted by the feedback channel module, and perform digital cancellation on the second digital signal and the first digital signal to eliminate a self-interference component of the second digital signal.