| 引用本文： |
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杨晓超,李渝,朱江,等.大尺度双基雷达等距离环杂波仿真及距离分辨率分析方法[J].电讯技术，2025，（8）：1330 - 1340. [点击复制]
- YANG Xiaochao,LI Yu,ZHU Jiang,et al.A Clutter Simulation Method and Range Resolution Analysis for Bistatic Radar Iso-range Rings under Large-scale Conditions[J].，2025，（8）：1330 - 1340. [点击复制]
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| 摘要: |
| 收发站大尺度下的双基雷达通常采用天发天收模式或天发空收模式，双基等距离环在地球表面不再是标准形状，等距离环的位置计算成为杂波仿真的难题。针对此问题，提出了一种大尺度下收发双基雷达等距环杂波仿真方法，将三维空间的椭球与球面交线计算问题分解为一系列二维平面上椭圆与圆相交的问题，进而采用射影几何的方法在二维平面获得交点闭式解，最后通过坐标逆变换获得等距离环的位置。该方法可以获得地球球面假设下等距离杂波环位置的闭式解。在此基础上分析了目前两种距离分辨率计算方法的等效性以及最大相对误差。通过仿真实验对不同大尺度构型下的等距离环、沿距离环的距离分辨率、距离分辨率最大相对误差及空时谱进行分析，证明了所提杂波仿真方法的有效性，仿真构型下的距离分辨率计算方法的最大相对误差优于10-3。 |
| 关键词: 天基双基雷达 空天双基雷达 双基等距离环 双基距离分辨率 双基杂波仿真 |
| DOI：10.20079/j.issn.1001-893x.250516002 |
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| 基金项目:国家自然科学基金资助项目（62107033）；全国重点实验室项目(2023-JCJQ-LB-007) |
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| A Clutter Simulation Method and Range Resolution Analysis for Bistatic Radar Iso-range Rings under Large-scale Conditions |
| YANG Xiaochao,LI Yu,ZHU Jiang,CHENG Ziyang,WANG Weiwei |
| (1.China Academy of Space TechnologyXi’an，Xi’an 710100,China;2.School of Electronic Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China) |
| Abstract: |
| For bistatic radar systems with large-scale separated transmitters and receivers(e.g.,space-based transmitter with space-based/airborne receiver configurations),the Earth’s spherical model must be considered in clutter simulation.Under such conditions,the bistatic iso-range contours deviate from standard geometries and their spatial localization becomes challenging.To address these issues,a spherical Earth-based iso-range contour simulation method is proposed for large-scale bistatic radar.This method decomposes the three-dimensional ellipsoid-sphere intersection problem into a series of two-dimensional ellipse-circle intersection calculations through coordinate system transformations.By applying projective geometry principles,closed-form solutions of intersection points are obtained in the transformed two-dimensional planes,followed by inverse transformations to reconstruct the spatial iso-range contours.This method derives a closed-form solution for the positions of clutter iso-rings under the spherical Earth assumption.Furthermore,the equivalence between two existing range resolution calculation methods and their maximum relative error is quantitatively analyzed.Comprehensive simulations under various large-scale configurations validate the generated iso-range contours,spatially-varying range resolution characteristics,and space-time spectral distributions.Maximum relative error of range resolution calculation in the simulation configuration is better than 10-3. |
| Key words: space based bistatic radar space-air based bistatic radar bistatic iso-range contour bistatic range resolution bistatic radar clutter simulation |
《电讯技术》编辑部 