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Sensors 2015, 15(8), 18402-18415; doi:10.3390/s150818402

A Novel Speed Compensation Method for ISAR Imaging with Low SNR

College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China
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Author to whom correspondence should be addressed.
Academic Editor: Assefa M. Melesse
Received: 1 June 2015 / Revised: 9 July 2015 / Accepted: 20 July 2015 / Published: 28 July 2015
(This article belongs to the Section Remote Sensors)
View Full-Text   |   Download PDF [427 KB, uploaded 28 July 2015]   |  

Abstract

In this paper, two novel speed compensation algorithms for ISAR imaging under a low signal-to-noise ratio (SNR) condition have been proposed, which are based on the cubic phase function (CPF) and the integrated cubic phase function (ICPF), respectively. These two algorithms can estimate the speed of the target from the wideband radar echo directly, which breaks the limitation of speed measuring in a radar system. With the utilization of non-coherent accumulation, the ICPF-based speed compensation algorithm is robust to noise and can meet the requirement of speed compensation for ISAR imaging under a low SNR condition. Moreover, a fast searching implementation strategy, which consists of coarse search and precise search, has been introduced to decrease the computational burden of speed compensation based on CPF and ICPF. Experimental results based on radar data validate the effectiveness of the proposed algorithms. View Full-Text
Keywords: ISAR; radar imaging; SNR; cubic phase function ISAR; radar imaging; SNR; cubic phase function
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

Liu, Y.; Zhang, S.; Zhu, D.; Li, X. A Novel Speed Compensation Method for ISAR Imaging with Low SNR. Sensors 2015, 15, 18402-18415.

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