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.

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 A Modified STAP Estimator for Superresolution of Multiple Signals

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Zhongbao Wang ◽  
Junhao Xie ◽  
Zilong Ma ◽  
Taifan Quan
Keyword(s):  
Remote Sensing ◽  
Data Analysis ◽  
Surface Wave ◽  
High Frequency ◽  
Real Data ◽  
Multiple Signals ◽  
First Order ◽  
Wave Radar ◽  
Simulation Results ◽  
Space Time Adaptive Processing

A modified space-time adaptive processing (STAP) estimator is described in this paper. The estimator combines the incremental multiparameter (IMP) algorithm and the existing beam-space preprocessing techniques yielding a computationally cheap algorithm for the superresolution of multiple signals. It is a potential technique for the remote sensing of the ocean currents from the broadened first-order Bragg sea echo spectrum of shipborne high-frequency surface wave radar (HFSWR). Some simulation results and real-data analysis are shown to validate the proposed algorithm.

scholarly journals A Novel Main-Lobe Cancellation Method Based on a Single Notch Space Filter and Optimized Correlation Analysis Strategy

2019 ◽  
Vol 2019 ◽  
pp. 1-11
Author(s):  
Jiazhi Zhang ◽  
Xin Zhang ◽  
Weibo Deng ◽  
Liang Guo ◽  
Qiang Yang
Keyword(s):  
Surface Wave ◽  
Correlation Analysis ◽  
Measured Data ◽  
Training Data ◽  
Main Lobe ◽  
Clutter Suppression ◽  
Sea Clutter ◽  
First Order ◽  
Wave Radar ◽  
Space Filter

The high-frequency hybrid sky-surface wave radar (HFSSWR) is a new kind of over-the-horizon radar system. Combining the advantages of both the sky wave radar and the surface wave radar, HFSSWR has drawn much attention in recent years. But the new system also brings new challenges. One of the most severe problems is that the heterogeneous environment makes a big challenge for the sea clutter suppression processing. Due to the nonstationary properties of the ionosphere, the first-order sea clutter statistics change significantly among range bins. So the new efficient sea clutter suppression method is required, and the clutter characteristics analyses are also in urgent need of research in order to guide the design of the algorithm in the background of HFSSWR. In this paper, utilizing the measured data set, we first analyse the range and spatial characteristics of the nonhomogeneous first-order sea clutter in HFSSWR. Then, an improved main-lobe cancellation (IMLC) method based on single notch space filter and correlation analysis is proposed to get training data which contains precise clutter information. A main-lobe clutter canceller based on the single notch space filter has been developed to block the target component, and an optimized correlation analysis (OCA) strategy is presented to choose the efficient training data. Finally, the method is examined by measured data and the results indicate that the method has a good performance for broadening first-order sea clutter suppression than the traditional method.

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.

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