提出了一种大气波导环境下的K分布雷达海杂波仿真方法,仿真了二维海杂波序列。该方法采用射线描迹和抛物 方程模拟蒸发波导中电磁波的传播过程,结合雷达方程计算K分布参数,利用球不变随机过程仿真产生K分布海杂波。 该二维序列一维为时间,另一维为距离,时间为相关时间,频谱为高斯谱;相邻距离单元之间独立,K分布参数在距离上慢 变化,可以认为距离上符合独立同分布假设。文中的二维海杂波序列可应用于雷达海杂波信号模拟中,作为海杂波反演 大气波导中的杂波信号,亦可用以分析雷达在不同波导环境中的超视距探测性能。

In this paper a method of simulation of 2-D radar sea clutter in evaporation ducts is proposed. Ray tracing is used to calculate the grazing angle and parabolic equation ( PE) is used to calculate the loss for different ranges, the parameters of the K-distributed sea clutter was then calculated by radar equation and SIRP has been used to generate K-distributed clutter series. One dimension of the series is time, the other is range. The series are simulated within the correlation time with Gauss spectrums and independent between the range bins. It can satisfy the assumption of independent identically distribution as the K-distribution parameters change slowly between the range bins. It can be used in radar signal simulation and can be used as the signal of sea clutter in the refractivity estimation from sea clutter. It can also be used to evaluate the over-the-horizon detecting performance in different

国家自然科学基金资助项目