Full-duplex radio-frequency self-interference suppression method and device

Abstract

The invention discloses a full-duplex radio-frequency self-interference suppression method and device, wherein the method comprises the steps of: obtaining locally transmitted radio-frequency signalsand locally received baseband analog signals, so that a self-interference channel model is established; reconstructing digital interference signals through digital excitation by utilizing the self-interference channel model, and converting the digital interference signals into analog self-interference signals through a DAC; and eliminating the analog self-interference signals from the locally received baseband analog signals, so that full-duplex radio-frequency self-interference suppression is completed. By means of the method, the self-interference signals in baseband analog received signalscan be effectively suppressed; the self-interference signal suppression process is simplified; and the suppression precision is improved.

Description

technical field [0001] The invention relates to the technical field of full-duplex interference suppression, in particular to a full-duplex radio frequency self-interference suppression method and device. Background technique [0002] At the same time, the same-frequency full-duplex technology can transmit and receive signals on the same frequency at the same time, which can theoretically double the spectral efficiency. However, since the local transmission signal of the transceiver will cause relatively serious self-interference to the local reception signal, or even drown the reception signal, in order to ensure full-duplex normal communication, it is necessary to effectively suppress the self-interference signal. [0003] However, the radio frequency self-interference suppression technology in the prior art usually extracts the local radio frequency transmission signal and reconstructs the self-interference signal through multiple parallel numerical control delayers and a...

AI Technical Summary

Problems solved by technology

However, since the local transmission signal of the transceiver will cause serious self-interference to the local reception signal, and even drown the reception signal, in order to ensure normal full-duplex communication, it is necessary to effectively suppress the self-interference signal

[0003] However, the radio frequency self-interference suppression technology in the prior art usually extracts the local radio frequency transmission signal and reconstructs the self-interference signal through multiple parallel numerical control delayers and attenuators, and subtracts the self-interference from the local radio frequency reception signal. The self-interference estimation and reconstruction errors restrict the radio frequency self-interference suppression capability, causing the residual self-interference signal to enter the receiver together with the received signal

Images