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Sensors 2017, 17(3), 498; doi:10.3390/s17030498

ISAR Imaging of Ship Targets Based on an Integrated Cubic Phase Bilinear Autocorrelation Function

1
National Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, China
2
Collaborative Innovation Center of Information Sensing and Understanding, Xidian University, Xi’an 710071, China
3
Department of Electronic Engineering, Duke University, Durham, NC 27708, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Ram M. Narayanan
Received: 20 January 2017 / Revised: 23 February 2017 / Accepted: 24 February 2017 / Published: 3 March 2017
(This article belongs to the Section Remote Sensors)
View Full-Text   |   Download PDF [8474 KB, uploaded 6 March 2017]   |  

Abstract

For inverse synthetic aperture radar (ISAR) imaging of a ship target moving with ocean waves, the image constructed with the standard range-Doppler (RD) technique is blurred and the range-instantaneous-Doppler (RID) technique has to be used to improve the image quality. In this paper, azimuth echoes in a range cell of the ship target are modeled as noisy multicomponent cubic phase signals (CPSs) after the motion compensation and a RID ISAR imaging algorithm is proposed based on the integrated cubic phase bilinear autocorrelation function (ICPBAF). The ICPBAF is bilinear and based on the two-dimensionally coherent energy accumulation. Compared to five other estimation algorithms, the ICPBAF can acquire higher cross term suppression and anti-noise performance with a reasonable computational cost. Through simulations and analyses with the synthetic model and real radar data, we verify the effectiveness of the ICPBAF and corresponding RID ISAR imaging algorithm. View Full-Text
Keywords: inverse synthetic aperture radar imaging; cubic phase signal; range-instantaneous-Doppler technique inverse synthetic aperture radar imaging; cubic phase signal; range-instantaneous-Doppler technique
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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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Zheng, J.; Liu, H.; Liu, Z.; Liu, Q.H. ISAR Imaging of Ship Targets Based on an Integrated Cubic Phase Bilinear Autocorrelation Function. Sensors 2017, 17, 498.

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