基于循环谱相关的雷达信号脉内分析改进算法

针对传统的雷达信号脉内特征分析算法存在的局限,提出了一种基于循环谱相关的雷达信号脉内特征分析的改进算法。该算法将传统的循环谱估计方法进行了改进,能对雷达信号脉内调制方式进行识别并提取脉内特征参数,然后结合改进的小波变换的优点,对识别出的相位编码信号进行相位突变点的提取,最后输出至完善的脉冲描述字中。改进的算法能够在较低计算量的同时保证较好的脉内特征参数的估算精度。仿真结果表明,在较低信噪比下,该算法仍然具有较好的性能。

A Improved Method Based on Cyclic Spectrum Correlation to Analyze Radar Signal Intra-pulse Feature

To avoid the limit of the traditional methods to analyze radar signal intra-pulse feature, a improved method based on cyclic spectrum correlation is proposed. This method improves traditional cyclic spectrum method,which can identify the modulation method of radar signal intra-pulse and extract the feature parameters. Then it takes advantage of improved wavelet transform and extracts the mutation points of identified PSK signal’s phase,which can help complete a thorough PDW. This improved method can ensure better estimation accuracy of the feature parameters of radar signal intra-pulse with lower computational cost. Simulation results show that this method has good performance under the condition of low SNRs.