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Remote Sensing
Volume 14
Issue 17
10.3390/rs14174342
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Article

An Adaptive and Accurate Method for Rotational Angular Velocity Estimation of Rotor Targets via Fourier Coefficient Interpolation

by
Wantian Wang
,
Jiahao Zhang
*,
Hao Wu
and
Jin Meng
National Key Laboratory of Science and Technology on Vessel Integrated Power System, Naval University of Engineering, Wuhan 430033, China
*
Author to whom correspondence should be addressed.
Remote Sens. 2022, 14(17), 4342; https://doi.org/10.3390/rs14174342
Submission received: 3 August 2022 / Revised: 27 August 2022 / Accepted: 29 August 2022 / Published: 1 September 2022
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Abstract

As a special micro-motion feature of rotor targets, rotational angular velocity can provide a discriminant basis for target classification and recognition. In this paper, an adaptive and accurate method is proposed for estimating the rotational angular velocity of rotor targets via a Fourier coefficient interpolation algorithm that is based on modified frequency index residue initialization. The negative frequency complex exponential signal component is removed at each iteration to eliminate the estimation bias caused by spectrum superposition and improve the estimation accuracy. The frequency index residue initialization is modified, based on a normalized Fourier spectrum, to improve the estimable range of the rotational angular velocity and reduce the computational complexity of the algorithm. The simulation results show that the estimation performance of the proposed method achieves the Cramér–Rao lower bound and outperforms state-of-the-art methods in terms of the estimable range and estimation accuracy of the rotational angular velocity.
Keywords: rotor target; rotational angular velocity estimation; Fourier coefficient interpolation; frequency index residue; parameter initialization rotor target; rotational angular velocity estimation; Fourier coefficient interpolation; frequency index residue; parameter initialization

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MDPI and ACS Style

Wang, W.; Zhang, J.; Wu, H.; Meng, J. An Adaptive and Accurate Method for Rotational Angular Velocity Estimation of Rotor Targets via Fourier Coefficient Interpolation. Remote Sens. 2022, 14, 4342. https://doi.org/10.3390/rs14174342

AMA Style

Wang W, Zhang J, Wu H, Meng J. An Adaptive and Accurate Method for Rotational Angular Velocity Estimation of Rotor Targets via Fourier Coefficient Interpolation. Remote Sensing. 2022; 14(17):4342. https://doi.org/10.3390/rs14174342

Chicago/Turabian Style

Wang, Wantian, Jiahao Zhang, Hao Wu, and Jin Meng. 2022. "An Adaptive and Accurate Method for Rotational Angular Velocity Estimation of Rotor Targets via Fourier Coefficient Interpolation" Remote Sensing 14, no. 17: 4342. https://doi.org/10.3390/rs14174342

APA Style

Wang, W., Zhang, J., Wu, H., & Meng, J. (2022). An Adaptive and Accurate Method for Rotational Angular Velocity Estimation of Rotor Targets via Fourier Coefficient Interpolation. Remote Sensing, 14(17), 4342. https://doi.org/10.3390/rs14174342

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