针对当前雷达辐射源信号唯一识别存在的问题,文中应用双谱分析和SIFT特征处理该问题得到了较好效果.首先对不同雷达发射的具有相同调制样式和调制参数的信号进行双谱变换,由于双谱中包含了诸如相位噪声等信号的个体特征,因此不同雷达辐射源信号间的双谱投影图具有差异,为充分利用此差异,进一步将双谱投影图转化为灰度图并提取其SIFT特征,最终通过特征匹配达到唯一识别的目的.仿真结果表明,文中方法在信号个体差异较小的情况下仍然可行,具有很强的适用性.“,”Bispectrum and SIFT feature are used proposed to resolve some problems of radar emitter exclusive recognition in this paper.Bispectrum of those signals which have same modulated format but different modulated parameters are extraeted,and They are different with each other because of the bispectmm contain some exclusive characteristics such as phase noise,then bispectrum projective figure is transformed to gray image and used as the last recognition characteristic.Simulation results show that this method is effective while the exclusive difference is inconspicuous.