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本文首先根据多散射中心理论与局部谐振原理，建立了雷达目标在光学区阶梯频率波形激励下的响应方程。在这种方程中，每个散射中心的局部瑞利或谐振响应曲线用各种不同的近似模型去逼近；然后导出了从目标的限带响应数据中抽取目标空间特征的结构成像方法，所得到的目标准二维图像既揭示了目标在宽带波形激励下的距离响应特征（即一维距离像），又反映了目标各局部散射中心的几何类型特征，可用于雷达目标的识别。
Based on the theory of multiple scattering center and local resonance, the response equation of the radar target excited by the staircase frequency waveform in the optical zone is established firstly. In this equation, the local Rayleigh or resonance response curves of each scattering center are approximated by different approximation models. Then, a structural imaging method of extracting the target spatial features from the target band-limited response data is derived. The target quasi-two-dimensional image not only reveals the target’s distance response characteristics (ie, one-dimensional distance image) under the excitation of wideband waveforms, but also reflects the geometry type characteristics of each local scattering center of the target and can be used for radar target recognition.