Research on characteristics of first‐order sea clutter for high‐frequency sky–surface wave radar

2016 ◽  
Vol 10 (10) ◽  
pp. 1124-1134 ◽  
Author(s):  
Li Ya‐jun ◽  
Wang Shu‐wen ◽  
Shao Sheng ◽  
Wang Zhuo‐qun ◽  
Wei Yin‐sheng ◽  
...  
Keyword(s):  
Surface Wave ◽  
High Frequency ◽  
Sea Clutter ◽  
First Order ◽  
Wave Radar

scholarly journals Spread Sea Clutter Suppression in HF Hybrid Sky-Surface Wave Radars Based on General Parameterized Time-Frequency Analysis

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Zhuo-qun Wang ◽  
Ya-jun Li ◽  
Jun-nan Shi ◽  
Peng-fei Wang ◽  
Ai-hua Liu ◽  
...  
Keyword(s):  
Surface Wave ◽  
High Frequency ◽  
Large Amplitude ◽  
Linear Prediction ◽  
Experimental System ◽  
Masking Effect ◽  
Sea Clutter ◽  
Time Frequency ◽  
First Order ◽  
Wave Radar

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.

scholarly journals Coast–Ship Bistatic HF Surface Wave Radar: Simulation Analysis and Experimental Verification

2020 ◽  
Vol 12 (3) ◽  
pp. 470
Author(s):  
Yonggang Ji ◽  
Jie Zhang ◽  
Yiming Wang ◽  
Chao Yue ◽  
Weichun Gong ◽  
...  
Keyword(s):  
Surface Wave ◽  
Frequency Shift ◽  
Simulation Analysis ◽  
Doppler Frequency ◽  
Operating Conditions ◽  
Sea Clutter ◽  
First Order ◽  
Wave Radar ◽  
Simulation Results ◽  
The Right

The coast–ship bistatic high-frequency surface wave radar (HFSWR) not only has the anti-interference advantages of the coast-based bistatic HFSWR, but also has the advantages of maneuverability and an extended detection area of the shipborne HFSWR. In this paper, theoretical formulas were derived for the coast–ship bistatic radar, including the first-order sea clutter scattering cross-section and the Doppler frequency shift of moving targets. Then, simulation results of the first-order sea clutter spectrum under different operating conditions were given, and the range of broadening of the first-order sea clutter spectrum and its influence on target detection were investigated. The simulation results show the broadening ranges of the right sea clutter spectrum and left sea clutter spectrum were symmetric when the shipborne platform was anchored, whereas they were asymmetric when the shipborne platform was underway. This asymmetry is primarily a function of platform velocity and radar frequency. Based on experimental data of the coast–ship bistatic HFSWR conducted in 2019, the broadening range of the sea clutter and the target frequency shift were analyzed and compared with simulation results based on the same parameter configuration. The agreement of the measured results with the simulation results verifies the theoretical formulas.

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