采用积分二次相位函数的雷达脉内调制类型识别

摘要

为了在低信噪比条件下获得较好的识别准确率，提出了一种基于积分二次相位函数( IQPF)的识别分类方法。根据不同信号的调频斜率的正负值完成信号的预分类，然后再利用不同信号的IQPF峰值-能量比以及功率谱估计实现信号的自动化分类。给出了识别流程图并进行了仿真实验，结果表明，该方法在信噪比大于-3 dB时，其识别正确率达到90%以上，证明了方法的有效性和可行性。相关研究为雷达脉内调制类型的识别提供了一种切实可行的方法，具有一定的应用价值。%A recognition method based on integral quadratic phase function(IQPF) is presented in order to improve the correct recognition rate under low signal-to-noise ratio( SNR) . The preliminary classification is completed according to the different signal frequency modulation slope . To implement the automatic identifi-cation,the IQPF peak-power ratio and power spectrum estimation are used. Recognition flow chart and the simulation experiment are given . The results indicate that the correct recognition rate can reach 90% or more when SNR is greater than -3 dB,so the method is feasible and effective. Research in this paper provides a feasible method for radar intra-pulse modulation types recognition,which has a certain application value.