Dr. He Tian Profile

Dr. He Tian

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Proceedings Article | 15 February 2022 Paper

A fast parameter estimation method for attributed scattering centers based on complex field separation

He Tian, Hongcheng Yin, Hongxia Mao, Weiwei Jia

Proceedings Volume 12166, 121661S (2022) https://doi.org/10.1117/12.2613535

KEYWORDS: Scattering, Radar, Electromagnetic scattering, Satellites, Associative arrays, Feature extraction, Lithium, Solar cells, Error analysis, Target recognition

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This paper presents focus on physical feature extraction and parameter estimation for satellites in space. In the context of increasingly prominent space security issues, it is necessary to improve the security and protection capabilities of the space system, especially the refined feature extraction and recognition technology of space targets. However, the feature extraction methods based on optical or radar imagery are limited by resolution and observation conditions, making it difficult to extract refined features. This paper is based on the attribute scattering center theory, using high-frequency electromagnetic wave detection method. Through the attribute parameter estimation result of the scattering center, the scattering structure on the space target can be identified and its distribution position can be analyzed, and the structure and size of the typical parts in the space target can be extracted. Aiming at the problem of high parameter dimension and large amount of calculation, an attributed scattering centers parameter estimation method with amplitude and phase separation is proposed, which reduces the time complexity of parameter estimation by an order of magnitude, saves system resources and increases the parameter estimation rate, and the estimation accuracy is better than 90%. In terms of the efficiency and accuracy of parameter estimation from simulation and experimental data, the effectiveness of the proposed method in this paper is verified.

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