摘要
针对下视雷达对近岸区域目标雷达特征信号的探测需求,采用双尺度随机起伏叠加的方式进行沙滩几何建模,基于混合介质模型获取沙滩电磁参数,利用外场实测数据,构建拟合模型、修正基尔霍夫近似算法,完成沙滩场景散射模型构建,精确模拟复合型粗糙沙地后向散射系数。仿真结果表明:采用测算融合方式得到的后向散射系数与实测数据相比均方根误差小于3 dB,精度较高,可以为近岸区域目标探测、识别、跟踪等提供理论依据和技术支撑。
In view of the requirement that the downward-looking radar detects the target radar characteristic signals in the near-shore area,the beach geometric modeling is built by means of superimposing two-scale random fluctuation.The beach electromagnetic parameters are obtained by using a mixed media model.Using the data of field measurements,the fitting model is constructed and the Kirchhoff approximation(KA)algorithm is modified to build the construction of a beach scene scattering model.The backscattering coefficients of complex rough sand are simulated accurately.The simulation results show that the root-meansquare error of the backscattering coefficients obtained by the measurement calculation fusion mode is less than 3dB,compared with witch obtained by the measured data.The accuracy of the backscattering coefficients is higher,which can provide theoretical basis and technical support for target detection,identification and tracking in the near-shore area.
作者
安锐
冯明
高鹏程
张元
张洁
胡宝文
AN Rui;FENG Ming;GAO Peng-Cheng;ZHANG Yuan;ZHANG Jie;HU Bao-wen(Science and Technology on Electromagnetic Scattering Laboratory,Shanghai 200438,China;Shanghai Radio Equipment Research Institute,Shanghai 201109,China;Aerospace System Engineering Shanghai,Shanghai 201108,China)
出处
《制导与引信》
2019年第4期31-34,共4页
Guidance & Fuze
基金
国家自然科学基金(61901269)
国家自然科学基金(51706145)
上海市自然基金(17210730900).
关键词
近岸区域
沙滩场景
后向散射系数
near-shore area
beach scene
backscattering coefficients
