In high-frequency (HF) hybrid sky-surface wave radar, the first-order sea clutter broadening is severe under the action of ionospheric phase disturbance and bistatic angles. In this paper, a cascaded method is described to suppress the spread sea clutter. Firstly, the radar configuration and sea clutter broadening model are introduced based on the newly developed integrated HF sky-surface wave experimental system. In the cascaded processing method, a new ionospheric decontamination method based on general parameterized time-frequency (GPTF) analysis is proposed to estimate or correct the ionospheric phase distortion with large amplitude. Then, the forward-backward linear prediction (FBLP) algorithm is used to suppress the spread sea clutter caused by bistatic angle. Simulation results show that such ionospheric decontamination method based on GPTF is helpful for the large-amplitude ionospheric contamination when the target masking effect happens even after ionospheric phase decontamination. Finally, the proposed method is examined by the measured data. Experimental results indicate that the proposed method can well suppress the broadening sea clutter for HF hybrid sky-surface wave radars.

中文翻译：

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基于通用参数化时频分析的HF混合天波雷达的海杂波抑制

在高频（HF）混合天表面波雷达中，在电离层相位扰动和双基地角的作用下，一阶海杂波加宽严重。在本文中，描述了一种级联方法来抑制海浪扩散。首先，基于新开发的综合性HF天面波实验系统，介绍了雷达配置和海杂波展宽模型。在级联处理方法中，提出了一种基于通用参数化时频（GPTF）分析的电离层去污方法，以估计或校正大幅度电离层相位畸变。然后，使用前向后线性预测（FBLP）算法来抑制由双基地角引起的扩展海浪杂波。仿真结果表明，这种基于GPTF的电离层去污方法，即使在电离层相去污后仍会发生目标掩盖效应，对于大幅度电离层污染也有帮助。最后，通过实测数据对提出的方法进行了研究。实验结果表明，该方法可以很好地抑制高频混合天波雷达的海杂波。