Iterative Restoration Algorithm for Real-Time Processing of Broadband Synthetic Aperture Sonar Data

1995 ◽  
Vol 1 (1) ◽  
pp. 19-31 ◽  
Author(s):  
E. Ochieng-Ogolla ◽  
S. Fischer ◽  
A. Wasiljeff ◽  
Ph. de Heering
Keyword(s):  
Real Time ◽  
Synthetic Aperture ◽  
Real Time Processing ◽  
Time Processing ◽  
Synthetic Aperture Sonar ◽  
Restoration Algorithm ◽  
Iterative Restoration

scholarly journals An Efficient Dual-Channel Data Storage and Access Method for Spaceborne Synthetic Aperture Radar Real-Time Processing

Electronics ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 662
Author(s):  
Guoqing Wang ◽  
He Chen ◽  
Yizhuang Xie
Keyword(s):  
Synthetic Aperture Radar ◽  
Real Time ◽  
Data Storage ◽  
Hardware Architecture ◽  
Synthetic Aperture ◽  
Access Method ◽  
Real Time Processing ◽  
Time Processing ◽  
Dual Channel ◽  
Data Controller

With the development of remote sensing technology and very large-scale integrated circuit (VLSI) technology, the real-time processing of spaceborne Synthetic Aperture Radar (SAR) has greatly improved the ability of Earth observation. However, the characteristics of external memory have led to matrix transposition becoming a technical bottleneck that limits the real-time performance of the SAR imaging system. In order to solve this problem, this paper combines the optimized data mapping method and reasonable hardware architecture to implement a data controller based on the Field-Programmable Gate Array (FPGA). First of all, this paper proposes an optimized dual-channel data storage and access method, so that the two-dimensional data access efficiency can be improved. Then, a hardware architecture is designed with register manager, simplified address generator and dual-channel Double-Data-Rate Three Synchronous Dynamic Random-Access Memory (DDR3 SDRAM) access mode. Finally, the proposed data controller is implemented on the Xilinx XC7VX690T FPGA chip. The experimental results show that the reading efficiency of the data controller proposed is 80% both in the range direction and azimuth direction, and the writing efficiency is 66% both in the range direction and azimuth direction. The results of a comparison with the recent implementations show that the proposed data controller has a higher data bandwidth, is more flexible in its design, and is suitable for use in spaceborne scenarios.

Study of InSAS Interferogram Filtering Based on Lattice Boltzmann Method

2013 ◽  
Vol 423-426 ◽  
pp. 2581-2586
Author(s):  
Chao Shuai Song ◽  
Jun Yue ◽  
Hong Xiu Gao
Keyword(s):  
Lattice Boltzmann Method ◽  
Real Time ◽  
Lattice Boltzmann ◽  
Edge Information ◽  
Real Time Processing ◽  
Time Processing ◽  
Synthetic Aperture Sonar ◽  
Computation Efficiency ◽  
Boltzmann Method ◽  
Real Experimental Data

On the issue of interferogram filter in Interferomatric Synthetic Aperture Sonar(InSAS), P - M model based on partial differential equation (PDE) can not only remove noise effectively, but also better keep the interferogram details and edge information. But its computation efficiency is relatively low and it can not be parallelized to real-time processing. Aiming to overcome these shortcomings, a de-noising method based on lattice Boltzmann method(LBM) is introduced. Processing results of the simulation and real experimental data show that the interferogram filtering method based on LBM can de-noise more effectively, and its calculation efficiency is better. In view of it, LBM can be used for real-time processing.

GPU Acceleration of Algorithm to Design Directional Volumetric Display for Real-time Processing

2019 ◽  
pp. 989
Author(s):  
Daiki Matsumoto ◽  
Ryuji Hirayama ◽  
Naoto Hoshikawa ◽  
Hirotaka Nakayama ◽  
Tomoyoshi Shimobaba ◽  
...  
Keyword(s):  
Real Time ◽  
Gpu Acceleration ◽  
Real Time Processing ◽  
Time Processing ◽  
Volumetric Display
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