地海杂波的随机分形模型

基金项目:

电子部预研基金和国家博士点基金资助项目

详细信息

Random Fractal Model for Terrain and Sea Clutter

摘要: 引入时变分形曲面描述地面和海面的局部动态特征,给出了三个合理电磁散射假设;采用基尔霍夫解定性分析散射场的时域分形特性,导出了地杂波和海杂波的分形模型;分析了杂波模型的幅度分布、功率谱和参数的特性。理论分析和数据仿真表明,分形模型可有效地对地杂波和海杂波进行建模。
- 时变分形曲面 /
- 地杂波 /
- 海杂波 /
- 分形模型
Abstract: The time-variant fractal surface is adopted to describe regional dynamical feamre of terrain and ocean surface. Under three rational assumptions on electromagnetic scattering, the time domain property of scattering field is analyzed qualitatively by applying Kirchhoff solution, and the fractal model of clutter from terrain and ocean surface is deduced. The amplitude distribution, power specmim and parameters of the returns are discussed in brief Theoretical analysis and simulated results prove that the fractal model matches the clutters from terrain and ocean suthee effectively.
- time-variant fractal surface /
- terrain clutter /
- sea clutter /
- fractal model