步进频率信号是一种以增大信号带宽为代价来提高雷达距离分辨力的宽带信号。在步进频率雷达中，将接收的基带信号看作是包含目标信息的指数函数的线性组合；而Prony 算法是用指数函数的一组线性组合来描述等间距采样数据的数学模型。将扩充的Prony算法应用到步进频率体制的雷达中，可以得到更为精确的目标信息，并且可以克服直接采用IDFT合成高分辨距离像的一些缺点。相应的建模分析和实验仿真，说明了该算法的优越性。

Stepped-frequency signal is a broad band signal which enhances range resolution of radar at the cost of increasing bandwidth. Baseband signal that is received in stepped-frequency radar can be thought of as the linear combination of exponential function which contains target information, while Prony algorithm is a mathematical mode which uses a linear combination of exponential function to describe equal space between sampling data. Extended Prony algorithm is applied to stepped-frequency radar, which can obtain more exact target information and overcome the shortcomings of using IDFT to synthesize high resolution range profiles. Corresponding modeling analysis and experiment simulation explain the advantages of Prony's method.

胡体玲（1977－），女，河南潢川县人，博士，讲师，主要研究方向为毫米波精确探测与目标识别、电路与系统