Affiliation:
1. Institute of Geospatial Information, Information Engineering University, Zhengzhou 450001, China
2. Henan Jingwei Beidou Navigation Technology Co., Ltd., Zhengzhou 450001, China
Abstract
In order to improve the simulation efficiency under the premise of ensuring the fidelity of synthetic aperture radar (SAR) simulation images, we propose a BVH-assisted fast SAR image simulation method based on spatial segmentation. The beam scanning model is established based on RD imaging geometric relation, and the bounding volume hierarchy (BVH) algorithm is used to assist in obtaining the time-varying latticed radiation and shadow areas within the radar beam, combining them with the real-time position of the sensors to complete the simulation of the electromagnetic (EM) wave transmission. The ray tracing algorithm is used to calculate the multiple backscatter fields of EM waves, including various material properties of the target surface. The SAR spatial traversal is adopted to spatially segment the latticed radiation area, and the compute unified device architecture (CUDA) kernel function is designed using the echo matrix cell method to make each cell of the target echo matrix as a subfield of the backscattering field, and the position of the echo matrix cell is traversed to obtain the target backscattering field. The target simulated echo is processed by the range Doppler (RD) imaging algorithm to obtain the SAR-simulated image. The simulation results show that compared with a CPU single-thread simulation, the simulation speed of the proposed method is significantly improved, and the SAR simulation image has high structural similarity with the real image, which fully verifies the effectiveness of the proposed method.
Funder
National Natural Science Foundation of China
Transportation Research Funding Plan of Henan
Reference28 articles.
1. Radar image simulation;Holtzman;IEEE Trans. Geosci. Electron.,1978
2. Chen, K.S. (2015). Principles of Synthetic Aperture Radar Imaging: A System Simulation Approach, CRC Press.
3. Synthetic aperture radar;Brown;IEEE Trans. Aerosp. Electron. Syst.,1967
4. Auer, S., Hinz, S., and Bamler, R. (2008, January 6–11). Ray Tracing for Simulating Reflection Phenomena in SAR Images. Proceedings of the Geoscience and Remote Sensing Symposium, 2008 IEEE International-IGARSS, Boston, MA, USA.
5. Ray-tracing simulation techniques for understanding high-resolution SAR images;Auer;IEEE Trans. Geosci. Remote Sens.,2009
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献