Parameter Estimation for Space Precession Targets With Intermittent Observation

Ye, Chunmao; Dong, Chunzhu; Wang, Yong; Hu, Qiangqiang

doi:10.1109/lgrs.2022.3198828

Cited by 3 publications

(2 citation statements)

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“…According to the geometrical theory of diffraction (GTD), the scattering response of a target can be well approximated as the sum of the responses from individual scattering centres. Compared to the ideal point model [1] and the damped exponential (DE) model [4], the frequency dependence term in the GTD model has a more explicit physical meaning and can provide richer object geometrical information. Thus, parameter inversion based on the GTD model is one of the research hotspots for micro‐motion feature extraction and target recognition.…”

Section: Introductionmentioning

confidence: 99%

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Type parameter estimation of 2D‐GTD model based on ADMM approach

Jin,

Wang,

Wei

et al. 2024

Electronics Letters

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The type parameter helps in scattering mechanism analysis and scattering centre identification. However, current approximate solution methods based on spectral estimation are noise‐sensitive and exhibit low accuracy. In this letter, a high‐precision approach for the type parameter based on the alternating direction method of multipliers (ADMM) is proposed. Logarithmic transformation is used to separate the type parameter and the amplitude from the coupling term, and initially obtain the closed‐form solution of the type parameter. Then, the regularization term of l2‐norm is used for denoising. Finally, a joint optimization model based on ADMM is constructed to effectively estimate the type parameter. Simulation results confirm the high accuracy of the proposed approach.

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Section: Introductionmentioning

confidence: 99%

“…Introduction: Space targets may have typical forms of micro-motion, such as spin or precession, in addition to translation motion [1]. Micromotion leads to a complex modulation effect on the radar echo, reflecting the intrinsic physical properties of the target and containing information about the target's size and scattering attributes [2,3].…”

mentioning

confidence: 99%