一种基于 PFRFT 的低截获信号识别算法磁

摘要

Aiming at modulation recognition problem for low probability of intercept radar signals ,a new type of modu‐lation recognition algorithm is put forward to complete the discriminator of eight kinds of LPI signals ,including LFM ,BPSK , 2FSK ,Frank/P1/P2/P3/P4code .The preliminary classification is completed according to the presence or absence of signal frequency modulation slope through PFRFT .And utilization of primary and secondary domain Fractional ridge line ,and the power spectrum estimation is used to complete the automatic classification of the signal .The flow chart and identify specific steps of classification algorithms are given .Simulation experiment shows that the algorithm has good recognition results and good effectiveness and feasibility .%针对低截获概率雷达信号的调制识别问题，提出了一种新的调制类型识别算法，完成了 LFM 、BPSK 、2FSK 、Frank／P1／P2／P3／P4码8种低截获信号的识别分类。首先，根据有无调频斜率，利用 PFRFT 完成低截获信号的预分类。然后，综合利用分数阶域主副脊线及功率谱估计完成信号的自动分类识别，给出了分类识别算法的流程图及具体步骤。最后通过仿真实验，表明该算法具有很好的识别效果，证明了该方法的有效性和可行性。