Electromagnetic model based SAR ATR through attributed scatterers

Conghui Ma; Gongjian Wen; Feng Gao; Xiaohong Huang; Xiaoliang Yang

doi:10.1117/12.2241891

21 October 2016 Electromagnetic model based SAR ATR through attributed scatterers

Conghui Ma, Gongjian Wen, Feng Gao, Xiaohong Huang, Xiaoliang Yang

Proceedings Volume 9993, Millimetre Wave and Terahertz Sensors and Technology IX; 99930M (2016) https://doi.org/10.1117/12.2241891
Event: SPIE Security + Defence, 2016, Edinburgh, United Kingdom

Abstract

Electromagnetic model (em-model) provides a concise and physically relevant description of target through representative scatterers. In a forward built em-model, detailed information about each scatterer’s position, scattering amplitude along with its provenance can be predicted. This makes em-model a good candidate for use in synthetic aperture radar (SAR) automatic target recognition (ATR). In this paper, we introduce scatterers’ provenance as attributed information into target recognition, and an attributed em-model based target recognition method is proposed. Firstly, according to the purpose of ATR, each scatterer in em-model is endowed with an importance factor based on its provenance. Secondly, a detection is implemented to decide whether the em-model predicted scatterer has a corresponding scatterer in measured data. If the scatterer exist in measured target, evaluate how similar the scatterer pair resembled with each other. Next, similarities of all the scatterer pairs are synthesized as a whole match score between em-model and SAR data. In the synthesis, the importance factor servers as a weighting factor that scatterer with more attention will be more discriminative for recognition. In the end, target in measured SAR data is recognized as the model type or not based on the match score. The novelty of this method comes from taking into account of the provenance information of scatterers as attributed information and endowing the scatterers with different important factors according to their importance in recognition. This makes the attributed scatterer based recognition method pertinent to the purpose of ATR. Experiments on simulated Tank SAR data that produced by a high frequency electromagnetic simulation software verified the effectiveness of this method.

Citation Download Citation

Conghui Ma, Gongjian Wen, Feng Gao, Xiaohong Huang, and Xiaoliang Yang "Electromagnetic model based SAR ATR through attributed scatterers", Proc. SPIE 9993, Millimetre Wave and Terahertz Sensors and Technology IX, 99930M (21 October 2016); https://doi.org/10.1117/12.2241891

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KEYWORDS

Target recognition

Scattering

Synthetic aperture radar

Automatic target recognition

Electromagnetic scattering

Data modeling

3D acquisition

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