基于对数正态分布的海杂波修正概率密度分布函数

Correction probability density distribution function of sea clutter based on logarithmic normal distribution

基于实测海杂波数据和参数拟合方法,提出了适用于X波段雷达的海杂波修正概率密度分布模型。统计了两型X波段雷达在不同距离段上、多周期的海杂波数据。结果表明,修正概率密度分布模型的误差降低了22%以上,且能够适用于不同距离段和扫描周期。海杂波概率密度分布模型能够用于恒虚警检测器门限计算,能够指导海杂波区域的目标检测方法设计。

The correction probability density distribution model of sea clutter is proposed for X-band radars based on the fitting method of actual sea clutter data and parameters.The sea clutter data of two types of X-band radars are given in different ranges and periods.The results indicate that the error of the correction probability density distribution model is reduced by over 22%,and the model is applicable to diverse ranges and scanning periods.The probability density distribution model of sea clutter can be used to calculate the threshold of the CFAR detector and guide the design of the target detection method in sea clutter area.