【摘要】 在电子侦察系统中 ,如何在多分量和复杂调制的情况下对线性调频 (LFM)信号进行快速而有效的检测是一个重要课题。利用LFM在分数阶域的特征 ,提出了基于高阶累积量的分数阶域峰度检测的算法 ,并定性地分析了其检测性能。结果证明 ,峰度检测对单分量、多分量LFM信号都具有良好的检测能力 ,同时可以进行低噪比检测。更多还原

【Abstract】 In electronic reconnaissance system,how to detect linear frequency-modulated(LFM) signal quickly and effectively especially under the circumstance of multi-component and complicated modulation is an important problem. In this paper,by using the characteristics of the LFM signal in fractional domain,the algorithm of kurtosis detection based on high-order culmulative weight in fractional domain is put forward, and the detection performance of the algorithm is analyzed qualitatively.The results demonstrate that the kurtosis detection has good detection ability to both single component and multi-component LFM signal,and also can complete the detection under the circumstance of low signal-noise ratio.更多还原