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时变海面复反射系数建模

李晓飞 许小剑

李晓飞, 许小剑. 时变海面复反射系数建模[J]. 北京航空航天大学学报, 2011, 37(2): 197-201.
引用本文: 李晓飞, 许小剑. 时变海面复反射系数建模[J]. 北京航空航天大学学报, 2011, 37(2): 197-201.
Li Xiaofei, Xu Xiaojian. Modeling of complex reflection coefficient for time-evolving sea surfaces[J]. Journal of Beijing University of Aeronautics and Astronautics, 2011, 37(2): 197-201. (in Chinese)
Citation: Li Xiaofei, Xu Xiaojian. Modeling of complex reflection coefficient for time-evolving sea surfaces[J]. Journal of Beijing University of Aeronautics and Astronautics, 2011, 37(2): 197-201. (in Chinese)

时变海面复反射系数建模

基金项目: 国家安全重大基础研究973计划资助项目
详细信息
    作者简介:

    李晓飞(1983-),女,河南南阳人,博士生,lxf3294@163.com.

  • 中图分类号: TN 011

Modeling of complex reflection coefficient for time-evolving sea surfaces

  • 摘要: 基于二维时变海面模型和粗糙面电磁散射的低阶小斜率近似方法,研究了海面复反射系数的时变和统计特性.在电磁散射幅度基础上推导了粗糙面反射系数及其相干和非相干分量,相干分量理论计算公式与经验模型一致.仿真结果表明相干分量幅度与经验模型基本吻合,但相位中存在明显的起伏特性,这种起伏在经验公式中没有体现出来.引入Middleton相位差统计模型为反射系数时变特性建模,仿真数据统计与理论分布吻合较好,且概率密度函数的等高图可以很好地表征时变复反射系数间的相关特性.这种吻合性表明复反射系数在短时间尺度上满足高斯分布,但其幅度和频率被海浪长波调制.

     

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出版历程
  • 收稿日期:  2009-12-10
  • 网络出版日期:  2011-02-28

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