Research on Radio Frequency Domain Interference Cancellation Technology for Non-cooperative Signals
With the development of communication technology,today's wireless communication not only pursues high data rates but also considers security as another important metric for evaluating communication quality.One of the main methods for ensuring secure communication is interference suppression.Based on different stages of interference suppression,it can be categorized into spatial domain interference suppression,radio frequency domain interference suppression,and digital domain interference suppression.Research on spatial domain and digital domain interference suppression is relatively mature,while studies focusing on radio frequency domain in-terference suppression have largely concentrated on self-interference,leaving a significant gap in research on radio frequency domain in-terference suppression against non-cooperative interference.To address non-cooperative interference signals,this paper proposes an radio frequency domain interference cancellation system architecture.This system utilizes multiple antennas to receive interference signals and employs the time delay and gain differences between different antennas to suppress the interference power on the main channel,ensuring that the signal does not saturate the device after entering the power amplifier.Simulation results indicate that the proposed interference cancellation architecture demonstrates good suppression capabilities for both narrowband and broadband interference in the absence of prior information about the interference,thereby proving the feasibility of the architecture.
interference suppressionnon-cooperative signalsradio frequency interference cancellation
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