A simultaneous co-frequency self-interference suppression system and method for removing indistinguishable signals

Abstract

The invention discloses a simultaneous same-frequency self-interference suppression system and method for removing indistinguishable signals. The system includes a digital signal processing unit, a transmitting component, a receiving component, a transmitting antenna, a receiving antenna, and an interference reconstruction unit; the transmitting component The input end of the transmission component is connected with the digital signal processing unit, and the output end of the transmitting component is connected with the transmitting antenna and the interference reconstruction unit respectively; the output terminals of the interference reconstruction unit and the receiving antenna are connected with the receiving component, and the output terminals of the receiving component are connected with the The digital signal processing unit is connected; the digital signal processing unit is also connected with the control input end of the receiving component. The present invention can stop receiving signals when the existence conditions of indistinguishable signals are satisfied, and normally perform signal reception when the existence conditions of indistinguishable signals are not satisfied, thereby effectively suppressing self-interference and removing indistinguishable signals, which is beneficial to useful signal reception.

Description

technical field [0001] The invention relates to self-interference suppression, in particular to a simultaneous co-frequency self-interference suppression system and method for removing indistinguishable signals. Background technique [0002] In today's society, the demand for wireless data services is increasing day by day, but the congestion of space wireless channels is becoming more and more prominent, which forces people to constantly seek new methods to improve the utilization rate of spectrum resources and the anti-interference performance of equipment. If wireless communication devices use full-duplex technology at the same time and frequency to transmit and receive wireless signals, there is no doubt that this will double the spectral efficiency of the wireless communication link. However, when the transmitting end and the receiving end of the wireless communication device work at the same frequency at the same time, the transmitted signal generated by the transmitti...

AI Technical Summary

Problems solved by technology

In self-interference suppression, especially radio-frequency domain suppression, limited by interference suppression cost, complexity and space volume, etc., a limited number of tap filters are usually used to reconstruct self-interference signals with rich multipath components, which cannot suppress It is difficult to distinguish the signal, which is also a large reason for the existence of residual self-interference

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