基于统计模型的时-空相关海杂波仿真

Simulation of Temporal-Spatial Correlated Sea Clutter Based on Statistic Model

工作于海洋环境下的雷达面临较严重的海杂波的影响,海杂波统计模型的研究对最优检测算法设计和雷达性能预估有重要作用。基于海杂波的复合散射理论,分析了海杂波非高斯幅度分布的特性、时间相关性及空间相关性。讨论了采用球不变随机过程产生时间和空间相关的海杂波仿真方法。对算法中散斑分量和纹理分量的参数估计,时间相关性和空间相关性的引入方法进行了分析。设定仿真环境仿真产生了具有时间和空间相关性的非高斯型海杂波数据,结果表明采用该方法的有效性。

Sea clutter impacts seriously on the effect and efficiency of maritime surveillance radars. The research on sea model will benefit optimum detection algorithm design and performance prediction. Based on the theory of compound scatter, the amplitude distribution, temporal correlation of the same patch of sea clutter and spatial correlation of adjacent sea clutter patch were discussed. Method to produce the non-Gaussion temporal-spatical correlated sea clutter by using SIRP was proposed The estimation of important parameters of the speckle component and texture component and introduction of temporal and spatial correlation in sea clutter simulation were analyzed. Sea clutter data was simulated under the certain conditions. Results prove the validity of this scheme.