摘要
机载雷达主要在海杂波背景下探测舰船目标,探测性能受海杂波影响大,海杂波分布特性直接影响检测器设计和系统探测性能.本文对L波段机载雷达回波特性、海杂波分布特性进行了理论分析建模,从目标检测的角度提出了海杂波预处理流程,并采用拟合的方法,基于实测数据对Rayleigh分布、Lognormal分布、复合K分布、Weibull分布等四种典型的杂波分布进行了验证,所用5级高海情和3级低海情数据样本分析表明,四种分布中Lognormal分布显著占优.上述方法与结论可用于辅助雷达最优检测器设计,具备较高的工程应用价值.
Airborne radar detects ship target mainly in sea clutter, and the detection performance is greatly bounded by sea clutter distribution property. This paper analyzes properties of L-band airborne radar echoes and especially those of sea clutter, and then presents pre-processing scheme of sea clutter from the view of ship detection. Classical distribution models namely Rayleigh, Weibull, Lognormal and compound K distribution, are verified with real radar data, which shows that the Lognormal distribution is the best. Therefore, the above preprocessing method and conclusion are meaningful in designing radar detector in practice.
作者
雷志勇
黄忠平
吴刚
张良
LEI Zhiyong;HUANG Zhongping;WU Gang;ZHANG Liang(Nanjing Research Institute of Electronics Technology,Nanjing 210039,China)
出处
《电波科学学报》
EI
CSCD
北大核心
2019年第5期558-566,共9页
Chinese Journal of Radio Science