基于相干的时变海面散射特性快速预估模型
发布时间：2019-05-27 23:15
【摘要】：针对传统的双尺度模型无法解决时变海面多普勒谱的快速计算问题,提出特高频(UHF)波段相干海杂波的散射特性快速预估模型,该模型基于面元散射的近似,在双尺度模型的基础上,假设每个面元的微尺度波可表示为一系列正弦毛细波,以此对每个面元的复反射系数进行修正。仿真验证结果表明,模型能够更精确地计算张力波对海面散射场的影响,不仅能有效模拟海杂波回波,而且有足够的精度来计算由实时场景演化产生的多普勒谱。
[Abstract]:In view of the fact that the traditional two-scale model can not solve the problem of fast calculation of Doppler spectrum of time-varying sea surface, a fast prediction model for scattering characteristics of coherent sea clutters in UHF (UHF) band is proposed, which is based on the approximation of surface element scattering. On the basis of the two-scale model, it is assumed that the microscale wave of each surface element can be expressed as a series of sinusoidal capillary waves, and the complex reflection coefficient of each surface element is modified. The simulation results show that the model can calculate the influence of tension wave on sea surface scattering field more accurately, which can not only simulate the sea hash echo effectively, but also have enough accuracy to calculate the Doppler spectrum produced by the evolution of real-time scene.
【作者单位】： 西安机电信息技术研究所;
【分类号】：TN011
本文编号：2486527
[Abstract]:In view of the fact that the traditional two-scale model can not solve the problem of fast calculation of Doppler spectrum of time-varying sea surface, a fast prediction model for scattering characteristics of coherent sea clutters in UHF (UHF) band is proposed, which is based on the approximation of surface element scattering. On the basis of the two-scale model, it is assumed that the microscale wave of each surface element can be expressed as a series of sinusoidal capillary waves, and the complex reflection coefficient of each surface element is modified. The simulation results show that the model can calculate the influence of tension wave on sea surface scattering field more accurately, which can not only simulate the sea hash echo effectively, but also have enough accuracy to calculate the Doppler spectrum produced by the evolution of real-time scene.
【作者单位】： 西安机电信息技术研究所;
【分类号】：TN011
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