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Sensors 2015, 15(3), 6905-6923; doi:10.3390/s150306905

Radar Imaging of Non-Uniformly Rotating Targets via a Novel Approach for Multi-Component AM-FM Signal Parameter Estimation

Research Institute of Electronic Engineering Technology, Harbin Institute of Technology, Harbin 150001, China
Academic Editor: Assefa M. Melesse
Received: 30 January 2015 / Revised: 9 March 2015 / Accepted: 17 March 2015 / Published: 23 March 2015
(This article belongs to the Section Remote Sensors)

Abstract

A novel radar imaging approach for non-uniformly rotating targets is proposed in this study. It is assumed that the maneuverability of the non-cooperative target is severe, and the received signal in a range cell can be modeled as multi-component amplitude-modulated and frequency-modulated (AM-FM) signals after motion compensation. Then, the modified version of Chirplet decomposition (MCD) based on the integrated high order ambiguity function (IHAF) is presented for the parameter estimation of AM-FM signals, and the corresponding high quality instantaneous ISAR images can be obtained from the estimated parameters. Compared with the MCD algorithm based on the generalized cubic phase function (GCPF) in the authors’ previous paper, the novel algorithm presented in this paper is more accurate and efficient, and the results with simulated and real data demonstrate the superiority of the proposed method. View Full-Text
Keywords: radar imaging; modified version of Chirplet decomposition; IHAF radar imaging; modified version of Chirplet decomposition; IHAF
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Wang, Y. Radar Imaging of Non-Uniformly Rotating Targets via a Novel Approach for Multi-Component AM-FM Signal Parameter Estimation. Sensors 2015, 15, 6905-6923.

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