摘要
基于Ku波段高分辨大入射余角(擦地角)海杂波数据,采用瑞利分布、韦布尔分布、对数正态分布、K分布和KK分布进行仿真,并与实测数据对比,分析了这些分布方式的拟合效果。结果表明,海杂波的幅度在大入射余角情况下基本还是逼近瑞利分布的,海杂波在某些距离单元上的幅度分布曲线尾部偏离瑞利分布,此时K和KK分布可在拖尾处达到更好的拟合效果。
The Ku-band, high-resolution sea clutter data at high grazing angles was used to fit the common theoretical models, including rayleigh distribution, Weibull distribution, logarithmic normal distribution, K distribution and KK distri- bution. The fitting effect of these distribution methods was analyzed in this paper and the results showed that the amplitude of sea clutter was close to rayleigh distribution in the case of large grazing angle and tail of the amplitude distribution curve of the sea clutter in some distance units deviates from the rayleigh distribution while the K and KK distributions couldfit better.
作者
宋杰
于家伟
丁昊
刘宁波
SONG Jie YU Jiawei DING Hao LIU Ningbo(Institute of Information Fusion Technology, NAAU, Yantai Shandong 264001, China School of Electrical Engineering, Southwest Jiaotong University, Chengdu 611756, China)
出处
《海军航空工程学院学报》
2017年第2期187-191,204,共6页
Journal of Naval Aeronautical and Astronautical University
基金
国家自然科学基金资助项目(61471381
61471380)
关键词
大入射余角
分布
海杂波
实测数据
large grazing angle
distribution
sea clutter
real data
