Radar Signal Processing for Low-observable Marine Target-Challenges and Solutions

Sea clutter analysis, suppression, basic and advanced marine target detection and classification techniques, future development are discussed in this paper. Firstly, challenges of marine radar signal processing will be introduced including the challenges of sea clutter suppression, characteristics of complex marine targets, detection and recognition. Subsequently, we will give an overview of popular signal processing techniques from the point of view of detection mechanism, signal modelling, energy integration, radar resolution, and processing domains. Then, this paper will give a deep discussion on the development and advances of marine target detection, i.e., long-time coherent integration, sparse time-frequency distribution, refined characteristics extraction and estimation via micro-Doppler, and deep learning for detection and classification. Finally, we will provide some real applications and examples of marine target detection for real applications.