基于变换谱相干积累的片段信号PRI检测

受自身搜索方式和目标辐射源波束调度的影响,侦察系统往往只能截获辐射源的部分信号,这为后续分选处理带来了很大挑战.针对该问题,提出了通过时PRI变换谱进行相干积累以提高真实PRI检测概率的方法.首先介绍了PRI变换法,对算法原理进行了说明；接着从理论上推导了PRI变换谱峰值与脉冲个数的关系,指出了PRI变换谱的相干积累特性,并分析了其对虚假脉冲的适应能力；最后通过仿真试验对理论分析进行了验证.仿真结果表明,文中提出的方法能够有效提高片段信号的PRI 谱峰,从而有利于提高检测概率.

PRI Detection of Segment Pulse Trains Based on Transform Spectrum Coherent Accumulation

Due to the effects of search modes and targets’ beam scheduling,the reconnaissance systems can only intercept segment pulse trains from emitters,which is a big challenge for signal sorting.For this problem,a new method based on PRI transform spectrum coherent accumulation is proposed.PRI transform algorithm is introduced.The relationship between PRI spectrum peak value and pulse number included is given and its coherent accumulation feature is then revealed.Simulation results show that the new method can efficiently enhance PRI spectrum and is favourable to improve the detection propability.