摘要
借鉴干涉式逆合成孔径雷达中多天线干涉处理的思想,采用L型三天线成像结构,提出了一种基于多天线干涉处理的窄带雷达空间旋转目标三维成像方法。推导了窄带条件下空间旋转目标回波干涉处理的原理,分析了短时傅里叶变换对回波干涉相位信息的影响,在对各天线回波进行短时傅里叶变换的基础上,在时频平面上有效区分了各散射点对应的回波曲线,获得了不同散射点对应的干涉相位信息,实现了对空间旋转目标的干涉式三维成像。与已有方法相比,该方法仅需利用单部多天线雷达即可获得目标的真实三维信息。仿真结果验证了所提方法的有效性。
This paper uses the idea of multi-antenna interferometric processing in interferometric inverse synthetic aperture radar for reference,and proposes a three dimensional imaging method by utilizing a L-shape three-antenna model for spinning space target in narrowband radar based on multi-antenna interfero-metric processing.First,the theory of spinning space target echo signal interferometric processing in nar-rowband radar is explained.Then,the influence of short-time Fourier transform （STFT）on the interfero-metric phase of echo signal is analyzed.Finally,through conducting STFT on the echo signal received by three antennas,the curves on time-frequency plane corresponding to different scatterers are effectively ex-tracted and separated,the interferometric phase of different scatterers is obtained,and three dimensional imaging for spinning space target is realized.Compared to the existing methods,this method only requires＆amp;nbsp;a single multi-antenna radar to obtain the real three dimensional distribution of target.The simulation re-sults show that the method is valid.
出处
《空军工程大学学报（自然科学版）》
CSCD
北大核心
2016年第4期46-51,共6页
Journal of Air Force Engineering University(Natural Science Edition)
基金
国家自然科学基金(61571457
61471386)
中国博士后科学基金(2015M570815)
关键词
多天线干涉处理
微多普勒效应
空间旋转目标
三维成像
multi-antenna interferometric processing
micro-Doppler effect
spinning space target
three di-mensional imaging
