修正的K-分布海杂波仿真模型和新的海杂波功率谱描述方法

Modified K-distribution model of sea clutter and a new method described in sea clutter power spectrum

为有效仿真时空相关海杂波和准确地描述海杂波的功率谱,提出一种基于球不变随机过程(SIRP)修正的时空相关二维K-分布海杂波仿真模型,以特征函数为桥梁给出一种新的海杂波功率谱描述方法。对生成杂波序列的时间和空间相关特性、幅度分布特性以及功率谱进行分析,并比较了常用的高斯函数模型与新的功率谱函数模型之间的差异。实验仿真和实测数据表明,修正的仿真模型是有效的,新推导的功率谱函数模型比高斯函数谱模型更能准确描述K-分布的功率谱。

AIn order to effectively emulate temporal and spatial correlation of sea clutter and accurately describe the power spec- trum of sea clutter, a modified K distribution model of sea clutter based on the spherically invariant random process （SIRP） is proposed. A new description of sea clutter power spectrum method is given by the characteristic function. Temporal and spatial correlation of clutter sequences, as well as power spectral amplitude distribution characteristics are analyzed, and the difference between the Gaussian function model and the new power spectral function model is compared. Theoretical analysis combined with experimental simulation shows that tile modified simulation model is effective, the new power spectrum func- tion model can more accurately describe K-distribution power spectrum