高频天地波联合传播一阶海杂波仿真分析

Simulation of the First Order Sea Clutter for a HF Hybrid Sky-Surface Wave Propagation

高频海杂波是高频海态参数反演重要载体,高频天地波联合传播(HSSWP)海杂波表现出与单纯天波或地波传播海杂波不同的特性,推导了HSSWP一阶海杂波Bragg频率,分析其Doppler频率及展宽随距离、方位、波束宽度的变化,给出一阶海杂波谱仿真结果,与实测图对比,并分析了一阶海杂波对目标探测的影响,最后给出影响一阶海杂波的其他因素。

Sea-clutter is the most important carrier which is used to inverse the sea-state. The sea clutter of HF hybrid sky-surface wave propagation（HSSWP） is different from the sky wave radar or surface wave radar＇ s. The first order sea clutter of the system is given in the paper, and the sea clutter frequence and spreading versus distance, azimuth and the width of beam are analyzed. The simulation is compared with the real data, indicating that the theoretics and simulation is right. It also analyzes the effect of detection performance by first order sea clutter. In the last, we discuss the other reasons that affect the sea clutter.