谱分析是雷达信号处理的重要组成部分，对目标分类、特征检测均有重要意义。高阶谱所具有的特殊性质，有助于人们从新的角度对雷达回波进行分析。本文提出了一种双谱分析双（Ｑ，Ｋ）方法。仿真结果表明，本文提出的方法与其它的双谱估计算法相比估计精度更高。最后给出了应用实例 Spectral analysis is an important part of radar signal processing, which has important significance for target classification and feature detection. The special properties of higher order spectra help people to analyze radar echoes from a new perspective. This paper presents a bispectrum analysis of double (Q, K) method. The simulation results show that the proposed method has higher estimation accuracy than other bispectral estimation algorithms. Finally, the application example is given