APES based STAP for target detection in spread-Doppler clutter

Tong, Peng; Yan, Wei; Ru, Xu

doi:10.1109/icsp.2016.7878101

Cited by 3 publications

(1 citation statement)

References 7 publications

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“…For the case of small amplitude phase path disturbance, typical methods include short coherent accumulation time method, maximum entropy spectrum analysis method, characteristic decomposition method, phase gradient method and polynomial phase modelling method etc. Time-frequency analysis is the main way to solve the problem in the case of largeamplitude phase-path disturbance, such as WVD and pseudo-Wigner-Ville distribution (PWVD) [16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Joint correction method for ionospheric phase pollution of high‐frequency sky‐surface wave radar based on adaptive optimal path

Wang

Zhang

et al. 2023

IET Radar Sonar & Navi

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The high-frequency (HF) hybrid sky-surface wave system is a new early warning radar. However, due to the influence of bistatic angle and ionospheric phase path disturbance, the echo spectrum will be widened, which seriously affects the ability of detecting slow targets of ships. In view of the overlapping of positive and negative Bragg broadening peaks caused by the large amplitude ionospheric phase path disturbance in the echo spectrum of HF sky-surface wave radar, a joint correction method of ionospheric phase pollution based on adaptive optimal path is proposed in this paper. Firstly, the timefrequency spectrum polluted by ionospheric phase is obtained by high resolution timefrequency MUSIC transform, then the ionospheric phase disturbance curve in the time spectrum of polluted echo is extracted by the proposed adaptive optimal path method, and then the polluted echo is initially compensated to obtain the sharpened ocean echo spectrum. Finally, the residual phase of pollution curve is estimated by the Phase Gradient Autofocus method, and then the pollution echo is accurately corrected. The results of theoretical and measured data show that this method is effective in correcting the overlapping of positive and negative Bragg broadening peaks caused by serious ionospheric phase pollution.

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Section: Introductionmentioning

confidence: 99%

Joint correction method for ionospheric phase pollution of high‐frequency sky‐surface wave radar based on adaptive optimal path

Wang

Zhang

et al. 2023

IET Radar Sonar & Navi

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Broadened Sea Clutter Suppression Method for Shipborne HF Hybrid Sky-Surface Wave Radar

Zhou

Yan

Liu

2020

2020 IEEE Radar Conference (RadarConf20)

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Spreading Sea Clutter Suppression for High-Frequency Hybrid Sky-Surface Wave Radar Using Orthogonal Projection in Spatial–Temporal Domain

Zhou,

Bai,

Zhu

et al. 2024

Remote Sensing

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In recent years, the high-frequency hybrid sky-surface wave radar (HSSWR) has been increasingly used for target detection applications. Nevertheless, the specific bistatic system layout and the phase path disturbances induced by the ionospheric propagation channel may severely spread the sea clutter spectrum, thereby deteriorating the detection ability of the HSSWR for slow-moving targets. In this work, a novel subspace method based on the hybrid use of the amplitude and phase estimator (APES) and the orthogonal projection (OP) in the spatial–temporal domain, denoted as the APES-OP method, is proposed to suppress the spreading first-order sea clutter of the HSSWR. The distribution characteristics of targets and first-order sea clutter in the spatial–temporal domain were investigated, and a time-domain subspace signal model was adopted to describe targets perturbed by ionospheric phase path modulation. An APES filter was adopted to filter out the potential targets with a traversal approach to avoid attenuating desired signals while suppressing sea clutter. After that, sampling data from multi-channels and slow-time domains at the cell under test were employed to construct a spatial–temporal matrix, which was then utilized to obtain the sea clutter subspace by singular value decomposition. Simulation results indicate that the proposed algorithm can suppress sea clutter while retaining the target, even if the target is buried by sea clutter. The processing results of measured data further demonstrate the efficiency of the proposed algorithm. After sea clutter suppression, the target obscured by clutter can be revealed, and the signal-to-clutter ratio of the target is greatly improved.

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APES based STAP for target detection in spread-Doppler clutter

Cited by 3 publications

References 7 publications

Joint correction method for ionospheric phase pollution of high‐frequency sky‐surface wave radar based on adaptive optimal path

Joint correction method for ionospheric phase pollution of high‐frequency sky‐surface wave radar based on adaptive optimal path

Broadened Sea Clutter Suppression Method for Shipborne HF Hybrid Sky-Surface Wave Radar

Spreading Sea Clutter Suppression for High-Frequency Hybrid Sky-Surface Wave Radar Using Orthogonal Projection in Spatial–Temporal Domain

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