Costas编码信号的循环谱特征分析与参数估计

Cyclic Spectral Features Analyzing and Parameters Estimating of Costas Coded Signal

研究了准确反映Costas编码信号特点的关键参数集合。基于循环谱相关密度估计方法，分析了Costas编码的循环谱特征及其与辐射源侍号参数的对应关系，提出了一种没有先验知识条件下Costas编码截获信号特征提取方法。通过对典型的Costas编码信号参数提取归一化均方根误差的计算，验证了该算法的有效性。

A set of key parameters representing the signal characters of Costas coded signals were studied. Based on cyclic spectral correlation density estimating method, the cyclic spectral features of Costas coded signals and the correspondence with signal parameters were investigated. A Costas coded intercept signal parameter extraction method without prior knowledge was developed. The normalized RMS errors （NRMSE） of typical Costas coded signals parameter extraction were measured to verify the validity of the method.