Research on characteristics of first-order sea clutter for high-frequency sky–surface wave radar
Research on characteristics of first-order sea clutter for high-frequency sky–surface wave radar
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DOI：
10.1049/iet-map.2014.0771
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发表时间：
2016-07
影响因子：
1.7
通讯作者：
L. Ya-jun;Wang Shuwen;S. Sheng;W. Zhuo-qun;Wei Yinsheng;Xu Rongqing
中科院分区：
文献类型：
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作者：
L. Ya-jun;Wang Shuwen;S. Sheng;W. Zhuo-qun;Wei Yinsheng;Xu Rongqing
在高频天波-地波混合雷达中，受电离层和收发分置角的影响，一阶海杂波展宽严重。这影响了对舰船目标的探测。因此，必须进行全面的分析，本研究报告将提出这一分析。首先，根据新体制雷达的几何结构和探测特点，分析了其定位原理和掠射角范围。在此基础上，给出了一阶海杂波的布拉格频率，并根据系统结构给出了展宽模型。其次，分析了一阶海杂波频移和展宽的机理，并根据系统布局，仿真分析了电离层、掠射角和收发分置角等因素对一阶海杂波的影响。分析了海杂波在不同距离和方位角下的频移和展宽特性。最后，将理论分析结果与基于新研制的综合实验系统的实验数据进行了对比，研究了海杂波展宽的主导因素。仿真结果表明，实验结果与理论分析相一致.
In high-frequency (HF) hybrid sky–surface wave radar, the first-order sea clutter broadening is severe under the influence of the ionosphere and bistatic angle. This affects the detection of ship targets. Thereby a comprehensive analysis is essential and will be presented in this study. First, according to the geometry configuration and detection characteristics of this new system radar, the positioning principle and the range of grazing angle are analysed. Then, the first-order sea clutter Bragg frequency is presented and broadening model is given on the basis of the system configuration. Next, the mechanism of first-order sea clutter frequency shift and broadening is explained and, based on the system layout, simulation is provided to illustrate the effects of various factors on first-order sea clutter, including ionosphere, grazing angle and bistatic angle. Moreover, the characteristics of sea clutter frequency shift and broadening in different range and azimuth are analysed. Finally, the results of theoretical analysis are compared with the experimental data based on the newly-developed integrated experimental system, and the dominant factor of sea clutter broadening is studied. Simulation results show that the results of experiment are consistent with that of theoretical analysis.