title: ISAR Imaging of Ship Targets Based on an Integrated Cubic Phase Bilinear Autocorrelation Function.
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.
authors.affiliation: National Laboratory of Radar Signal Processing, Xidian University, Xi'an 710071, China. jibin_zheng@sina.cn.|Collaborative Innovation Center of Information Sensing and Understanding, Xidian University, Xi'an 710071, China. jibin_zheng@sina.cn.
authors.forename: Jibin
authors.initials: J
authors.lastname: Zheng
authors.affiliation: National Laboratory of Radar Signal Processing, Xidian University, Xi'an 710071, China. hwliu@xidian.edu.cn.|Collaborative Innovation Center of Information Sensing and Understanding, Xidian University, Xi'an 710071, China. hwliu@xidian.edu.cn.
authors.forename: Hongwei
authors.initials: H
authors.lastname: Liu
authors.affiliation: National Laboratory of Radar Signal Processing, Xidian University, Xi'an 710071, China. lz@xidian.edu.cn.|Collaborative Innovation Center of Information Sensing and Understanding, Xidian University, Xi'an 710071, China. lz@xidian.edu.cn.
authors.forename: Zheng
authors.initials: Z
authors.lastname: Liu
authors.affiliation: Department of Electronic Engineering, Duke University, Durham, NC 27708, USA. qhliu@ee.duke.edu.
authors.forename: Qing Huo
authors.initials: QH
authors.lastname: Liu
keywords: cubic phase signal; inverse synthetic aperture radar imaging; range-instantaneous-Doppler technique