%0 Journal Article
%T 雷达目标双曲线调频回波生成<br>Radar echo generation for hyperbolic frequency-modulation waveforms
%A 周伟
%A 叶春茂
%A 金侃
%A 鲁耀兵
%A 杨健
%J 清华大学学报（自然科学版）
%D 2015
%X 由于双曲线调频(hyperbolic frequency-modulation, HFM)信号具备良好的Doppler不变性, 比线性调频信号更有利于高速运动目标的探测和成像。但是对于复杂电大尺寸目标, 直接采用高频电磁散射理论生成宽带回波计算量非常庞大。为研究HFM信号在宽带雷达成像中的应用, 该文提出一种利用目标静态电磁计算数据的HFM信号回波快速生成方法, 通过相位匹配滤波和频域降采样有效地降低了计算复杂度, 并详细分析了目标高速运动对HFM信号匹配滤波的影响。该方法同时适用于线性调频信号的宽带回波仿真。仿真结果验证了该方法的正确性和有效性。<br>Abstract：The hyperbolic frequency-modulation (HFM) waveform is more conducive to high speed moving target detection and imaging than the commonly used linear frequency-modulation (LFM) waveform, due to its inherent Doppler-invariant property. However, the generation of radar echoes is computationally intensive when using high frequency algorithms for complex electrically large targets. A fast method was developed for generating HFM radar echoes using static electromagnetic data for HFM waveforms in wideband radar imaging with the computational complexity effectively reduced by phase-matched filtering and frequency domain down-sampling. The result is used to study the influence to HFM signal matched filtering for high-speed movements. This method is also suitable for LFM waveforms. Simulations verify the accuracy and effectiveness of this method.
%K 宽带回波生成
%K 双曲线调频
%K 高速运动目标
%K 匹配滤波
%K &lt
%K br&gt
%K wideband echo generation
%K hyperbolic frequency-modulation
%K high speed targets
%K matched filtering
%U http://jst.tsinghuajournals.com/CN/Y2015/V55/I8/878