Abstract
Radar sea clutters are echoes reflected from a patch of ocean surface, which may significantly interfere with the signals from targets, and seriously degrade the performance of marine radar remote sensing. Thus, it is vital to eliminate the effects of sea clutter. In this paper, we aim at normalizing sea clutter to a uniform level. Firstly, a detailed analysis about the characteristics and differences of clutter and targets is presented; then, we present a heuristic processing scheme which works by solving the task of sea clutter normalization as a classification problem followed by energy normalization. Multiscale and speed‐up strategies are incorporated into the dynamic clustering algorithm to found a robust real‐time normalization method. Finally, extensive experiments show state‐of‐the‐art results on challenging sea clutter echoes, which demonstrate the feasibility and robustness of the proposed adaptive clustering normalization method.
Highlights
Marine radar has played a pivotal role in the field of remote sensing applications, especially for maritime navigation, marine rescue, maritime surveillance, and national safety.the radar data may be severely affected by sea clutters, which significantly degrade the performance of the radar system
The sea clutters are echoes reflected from the ocean surface, which highly depend on radar frequency, grazing angle, sea state, polarization, rain, wind velocity, and direction [1, 2]
Sea clutter may severely interfere with the signals from targets and seriously degrade the performance of the target detection, for the targets with low speed and low radar cross-section (RCS) [4]
Summary
Marine radar has played a pivotal role in the field of remote sensing applications, especially for maritime navigation, marine rescue, maritime surveillance, and national safety.the radar data may be severely affected by sea clutters, which significantly degrade the performance of the radar system. The sea clutters are echoes reflected from the ocean surface, which highly depend on radar frequency, grazing angle, sea state, polarization, rain, wind velocity, and direction [1, 2]. These parameters strongly couple with each other, and the relationships between them are quite complex [3]. Sea clutter may severely interfere with the signals from targets and seriously degrade the performance of the target detection, for the targets with low speed and low radar cross-section (RCS) [4]. It is critical to eliminate the effects of sea clutter
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