基于间隔自相关的跳频跳时信号突发检测OA北大核心CSTPCD

A detection method based on interval autocorrelation coefficient(IAC)is proposed to address the difficulty of burst detecting frequency hopping/time hopping(FH/TH)communication signal under strong radar interference.On each hopping frequency sub channel,the maximum pulse width of the radar is used as the correlation length and interval unit,and two adjacent signals are extracted to calculate the IAC.In terms of the feature that the IAC of the FH/TH signal is much greater than the correlation coefficient of the radar pulse and random noise,the detection of the FH/TH signal can be achieved by confirming the burst-time and end-time of each sub channel,which are determined by point-by-point sliding and combined threshold method,and utilizing the cohesive relation of the burst time of each sub channel.The simulation re-sults illustrate that,under the condition of strong interference,the proposed method can effectively overcome the radar inter-ference and the burst detection probability of FH/TH signal is nearly close to 1.The real electromagnetic environment test results state that the method is less affected by interference of strong radar pulse,and is able to achieve relatively accurate detection.