天波/地波组合传播模式下一阶海杂波特性分析  

Study on characteristic of first order sea-clutter in the hybrid sky-surface wave propagation mode

作　　者：杨龙泉[1] 凡俊梅[1,2] 蔚娜[1] 李星[1] 焦培南[1,2] 李吉宁[1] 

机构地区：[1]中国电波传播研究所,山东青岛266071 [2]电波环境特性及模化技术国家重点实验室,山东青岛266107

出　　处：《电波科学学报》2012年第4期703-708,847,共7页Chinese Journal of Radio Science

基　　金：国家自然科学基金重点项目(61032011)

摘　　要：分析天波反射/地波绕射组合模式下一阶海杂波的产生机制、展宽原理,导出了一阶海杂波频移、展宽计算公式;结合距离换算、双基地角、擦地角计算公式,对组合模式下一阶海杂波频谱随距离、方位的分布特性及展宽特性进行了理论计算分析。实测信号频谱特征与理论分析结果的对比表明:实验结果与理论分析相符合,验证了天波反射/地波绕射集成概念是成立的,进一步证明了天波/地波集成探测技术原理可行。In this paper, the production mechanism and the Doppler spread of the first sea-clutter in the Hybrid Sky-Surface Wave Propagation Mode are investiga- ted. Then, the Doppler shift and spectrum spread formula are induced. Combined with coordinate conversion formula, the distribution and spread characteristic of the first order sea-clutter along range and azimuth are calculated and discussed. By compared the feature of the sea-clutter trial spectral with the theoretic distribution and spread characteristic, the experimental results accord with theoretic, which testifies that the conception of hybrid HF sky-surface wave is tenable. Simultane- ously, the technical feasibility of this radar system is also tested.

关 键 词：天波/地波组合传播模式 一阶海杂波 杂波分布 频谱展宽 

分 类 号：TN911[电子电信—通信与信息系统]