摘要
介绍了海杂波统计特性建模的幅度特性、多普勒谱及空间相关这三个方面的研究状况,对各种建模的思路和模型效果进行了对比总结。对于幅度均值已有多个较为成熟的模型,但适用范围不同,结果差异也很大。幅度分布建模重点解决拖尾问题,复合建模是趋势。除平均谱外,开始研究短时多普勒谱。空间相关性建模主要建立空间相关长度与雷达及海洋参数间的联系,但是研究还不够全面。总的来看,已由单纯经验建模发展为力图在机理研究指导下有一定物理意义的建模。尽管海杂波建模效果愈来愈接近实际,但建模依然存在诸多问题。
The paper introduced research states on radar sea clutter modeling of statistical characteristics from amplitude characteristic, Doppler spectrum and space correlation, compared and summarized various thoughts and model effects of modeling. There were mature models on the average amplitude value; but their range of application was different and their results were much different. The molding of amplitude distribution ware targeted to solve the trailing issue. It was a tendency to carry out compound modeling. In addition to the average spectrum, study of short-time Doppler spectrum was also started. The modeling of space correlation aimed to establish the relationship between parameters of spatial correlation length and radar and sea, but it was not comprehensive enough. In a word, it has been developed from simple experience modeling to that with certain physical meaning under the guidance of sea clutter mechanism study. Although modeling effects become closer and closer to the reality, but many problems still exist.
作者
尹志盈
张玉石
YIN Zhi-ying ZHANG Yu-shi(National Key Laboratory of Electromagnetic Environment, China Research Institute of Radiowave Propagation, Qingdao 266107, China)
出处
《装备环境工程》
CAS
2017年第7期29-34,共6页
Equipment Environmental Engineering
关键词
海杂波
建模
统计特性
幅度分布
多普勒谱
sea clutter
modeling
statistical characteristic
amplitude distribution
Doppler spectrum
