1. Refocusing High-Resolution SAR Images of Complex Moving Vessels Using Co-Evolutionary Particle Swarm Optimization.
- Author
-
Yu, Lei, Li, Chunsheng, Chen, Jie, Wang, Pengbo, and Men, Zhirong
- Subjects
PARTICLE swarm optimization ,SUCCESSIVE approximation analog-to-digital converters ,OCEAN waves ,PARALLEL processing ,SYNTHETIC aperture radar ,PARALLEL algorithms - Abstract
To increase the global convergence and processing efficiency of particle swarm optimization (PSO) applied in the adaptive joint time-frequency, in this study an improved PSO is proposed to refocus the high-resolution SAR images of complex moving vessels in high sea states. According to the characteristics of the high-order multi-component polynomial phase signal, this algorithm provides parallel processing and co-evolution methods by setting the different permissions of the sub-population and sharing its search information. As a result, the multiple components can be extracted simultaneously. Experiments were conducted using the simulation data and Gaofen-3 (GF-3) SAR data. Results showed the processing speed increased by more than 40% and the global convergence was significantly improved. The imaging results verify the efficiency and robustness of this co-evolutionary PSO. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF