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Appl. Sci. 2017, 7(5), 500; doi:10.3390/app7050500

A Fast Motion Parameters Estimation Method Based on Cross-Correlation of Adjacent Echoes for Wideband LFM Radars

1
School of Information Science and Engineering, Xiamen University, Xiamen 361005, China
2
Department of Chemical and Materials Engineering, National University of Kaohsiung, Kaohsiung 81148, Taiwan
3
Beijing Institute of Tracking and Telecommunications Technology, Beijing 100094, China
These authors contributed equally to this work.
*
Authors to whom correspondence should be addressed.
Academic Editors: Shoou-Jinn Chang, Teen-Hang Meen and Stephen D. Prior
Received: 15 April 2017 / Revised: 7 May 2017 / Accepted: 9 May 2017 / Published: 15 May 2017
(This article belongs to the Special Issue Selected Papers from IEEE ICASI 2017)
View Full-Text   |   Download PDF [922 KB, uploaded 15 May 2017]   |  

Abstract

In wideband radar systems, the performance of motion parameters estimation can significantly affect the performance of object detection and the quality of inverse synthetic aperture radar (ISAR) imaging. Although the traditional motion parameters estimation methods can reduce the range migration (RM) and Doppler frequency migration (DFM) effects in ISAR imaging, the computational complexity is high. In this paper, we propose a new fast non-parameter-searching method for motion parameters estimation based on the cross-correlation of adjacent echoes (CCAE) for wideband LFM signals. A cross-correlation operation is carried out for two adjacent echo signals, then the motion parameters can be calculated by estimating the frequency of the correlation result. The proposed CCAE method can be applied directly to the stretching system, which is commonly adopted in wideband radar systems. Simulation results demonstrate that the new method can achieve better estimation performances, with much lower computational cost, compared with existing methods. The experimental results on real radar datasets are also evaluated to verify the effectiveness and superiority of the proposed method compared to the state-of-the-art existing methods. View Full-Text
Keywords: motion parameters estimation; wideband LFM radar; cross-correlation motion parameters estimation; wideband LFM radar; cross-correlation
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Zhang, Y.-X.; Hong, R.-J.; Yang, C.-F.; Zhang, Y.-J.; Deng, Z.-M.; Jin, S. A Fast Motion Parameters Estimation Method Based on Cross-Correlation of Adjacent Echoes for Wideband LFM Radars. Appl. Sci. 2017, 7, 500.

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