一种基于相干积累CPF和NUFFT的机动目标ISAR成像新方法

doi:10.3969/j.issn.0372-2112.2017.09.025

电子学报 ›› 2017, Vol. 45 ›› Issue (9): 2225-2232.DOI: 10.3969/j.issn.0372-2112.2017.09.025

一种基于相干积累CPF和NUFFT的机动目标ISAR成像新方法

李东¹, 占木杨¹, 粟嘉², 方志平¹, 曹海林¹

1. 重庆大学飞行器测控与通信教育部重点实验室, 重庆 400044;
2. 西北工业大学电子信息学院, 陕西西安 710072

收稿日期:2016-02-26 修回日期:2016-06-18 出版日期:2017-09-25
- 作者简介:
- 李东,男,1983年生于内蒙古商都.重庆大学通信与测控中心教育部重点实验室讲师.研究方向为SAR/ISAR成像算法设计,参数估计等.E-mail:lidongcuit@126.com;占木杨,男,1992年生于湖北黄冈.重庆大学电子与通信工程系硕士研究生,研究方向为ISAR成像算法设计以及参数估计;粟嘉,男,1984年生于广西桂林.西北工业大学电子信息学院讲师.研究方向为时频分析,参数估计等.
- 基金资助:
- 国家自然科学基金 (No.61501068，No.61301120，No.51377179）; 重庆市前沿与应用基础研究计划 (No.CSTC2015jcyjA40001）; 中央高校基金 (No.106112015CDJXY500001）

A Novel ISAR Imaging Method Based on Coherent Integration CPF and NUFFT for Maneuvering Target

LI Dong¹, ZHAN Mu-yang¹, SU Jia², FANG Zhi-ping¹, CAO Hai-lin¹

1. Key Laboratory of Aerocraft Tracking Telemetering & Command and Communication, Ministry of Education, Chongqing University, Chongqing 400044, China;
2. School of Electronics and Information, Northwestern Polytechnical University, Xi'an, Shaanxi 710072 China

Received:2016-02-26 Revised:2016-06-18 Online:2017-09-25 Published:2017-09-25
- Supported by:
- National Natural Science Foundation of China (No.61501068, No.61301120, No.51377179); Frontier and Applied Basic Research Project of Chongqing Municipality (No.CSTC2015jcyjA40001); Funds for the Central Universities (No.106112015CDJXY500001)

摘要/Abstract

摘要： 机动目标的复杂运动导致散射体回波信号多普勒频率时变，给逆合成孔径雷达（ISAR）成像方位向处理带来困难.而传统的距离-多普勒（RD）成像方法、Wigner-Ville distribution（WVD）瞬时成像方法、Radon-Wigner等成像方法由于成像效果差或运算效率低等因素，不适合复杂运动目标的ISAR实时成像.针对这些问题，本文提出了一种基于相干积累三次相位函数（CPF）的机动目标ISAR成像新方法.首先，把平动补偿后的各距离单元数据，通过CPF变换到时间-调频率平面.然后，利用各散射体自项能量平行于时间轴分布特性，提出一种基于相干积累的交叉项和虚假伪峰抑制方法，进而得到各散射体在频率-调频率平面的高分辨分布特性.最后，通过向频率轴上的投影得到该距离单元目标的方位ISAR图像，并通过引入非均匀快速傅立叶变换（NUFFT）来降低算法计算复杂度.计算机仿真处理结果验证了该方法的有效性.

关键词: 逆合成孔径雷达, 机动目标, 改进的三次相位函数, 非均匀快速傅里叶变换

Abstract: The azimuth time-varying Doppler frequency,caused by the complex movement of maneuvering target,deteriorates the azimuth focusing quality.Conventional Range-Doppler (RD) imaging algorithm,Wigner-Ville distribution (WVD) imaging algorithm and Radon-Wigner imaging algorithm,due to Poor image quality and inefficient operation and so on,are unfit for ISAR imaging of the complex motion target.To solve these problems,a novel ISAR imaging method based on coherent integration cubic phase function (CPF) for maneuvering target is proposed in the letter.First,the echo data in a range bin after translational compensation are transformed into the time-chirp rate plane via CPF.Then,the auto-terms energy can be coherently integrated in the time-chirp rate distribution plane and can effectively suppress the troublesome cross-term interference and spurious peaks,and then obtain the distribution of the scatter energy in frequency-chirp rate plane.Finally,the azimuth ISAR image can be obtained via a simple maximization projection from the two-dimensional accumulated plot to the azimuth dimension,and the non-uniform fast Fourier transform (NUFFT) is also adopted to reduce the computing complexity.Computer simulation results verify the effectiveness of the proposed method.

Key words: inverse synthetic aperture radar (ISAR), maneuvering target, modified cubic phase function (MCPF), non-uniform fast Fourier transform (NUFFT)

中图分类号:

TN957

李东, 占木杨, 粟嘉, 等. 一种基于相干积累CPF和NUFFT的机动目标ISAR成像新方法[J]. 电子学报, 2017, 45(9): 2225-2232.

LI Dong, ZHAN Mu-yang, SU Jia, et al. A Novel ISAR Imaging Method Based on Coherent Integration CPF and NUFFT for Maneuvering Target[J]. Acta Electronica Sinica, 2017, 45(9): 2225-2232.

参考文献

[1] Ruan H,Wu Y H,Jia X.Novel ISAR imaging algorithm for maneuvering targets based on a modified keystone transform[J].IEEE Geosci Remote Sens Lett,2014,11(1):128-132.
[2] Chen V C,Qian S.Joint time-frequency transform for radar range Doppler imaging[J].IEEE Trans Aerosp Electron Syst,1998,34(2):486-499.
[3] Wang Y,Zhao B.Inverse synthetic aperture radar imaging of nonuniformly rotating target based on the parameters estimation of multicomponent quadratic frequency-modulated signals[J].IEEE Sensors Journal,2015,15(7):4053-4061.
[4] Chen V C,Miceli W J.Time-varying spectral analysis for radar imaging of maneuvering targets[J].IEE Proc-Radar Sonar Navig,1998,145(5):262-268.
[5] Kim K T,Choi I S,Kim H T.Efficient radar target classification using adaptive joint time-frequency processing[J].IEEE Tran Antennas Propaga,2000,48(12):1789-1801.
[6] Bao Z,Sun C,Xing M D.Time-frequency approaches to ISAR imaging of maneuvering targets and their limitations[J].IEEE Trans Aerosp Electron Syst,2001,37(7):1091-1099.
[7] Berizzi F,Mese E D,Diani M.High-resolution ISAR imaging of maneuvering targets by means of the range instantaneous Doppler technique:Modeling and performance analysis[J].IEEE Trans Image Process,2001,10(12):1880-1890.
[8] Wang Y,Jiang Y C.ISAR imaging of maneuvering targets based on the L-class of fourth-order complex-lag PWVD[J].IEEE Trans Geosci Remote Sens Lett,2010,48(3):1518-1527.
[9] Lv X L,Xing M D,Wan C R,Zhang S H.ISAR imaging of maneuvering targets based on the range centroid Doppler technique[J].IEEE Trans Image Process,2010,19(1):141-153.
[10] 李亚超,全英汇,邢孟道.一种基于时频分布尺度变换的ISAR成像新方法[J].电子学报,2009,37(9):2085-2091. LI Ya-chao,QUAN Ying-hui,XING Meng-dao.A new method of ISAR imaging based on the scale transform in time-frequency distribution plane[J].Acta Electronica Sinica,2009,37(9):2085-2091.(in Chinese)
[11] O'Shea,P.A fast algorithm for estimating the parameters of a quadratic FM signal[J].IEEE Trans Signal Processing,2004,52(2):385-393.
[12] Wang P,Yang J Y.Multicomponent chirp signals analysis using product cubic phase function[J].Digital Signal Processing,2006,16(6):654-669.
[13] Wang P,Li H B,Djurovic' I,Himed B.Integrated cubic phase function for linear FM signal analysis[J].IEEE Trans Aerospace and Electronic Systems,2014,46(3):963-977.
[14] 邢涛,李军,王冠勇.基于非均匀快速傅里叶变换的SAR方位向运动补偿算法[J].电子与信息学报,2014,36(5):1023-1029. Xing tao,Li Jun,Wang Guan-yong.An along-track motion compensation algorithm based on non-uniform fast fourier transform (NUFFT) for SAR[J].Journal of Electronics & Information Technology,2014,36(5):1023-1029.(in Chinese)
[15] J Wang,X Liu.Improved global range alignment for ISAR[J].IEEE Trans Aerosp Electron Syst,2007,43(3):1070-1075.

一种基于相干积累CPF和NUFFT的机动目标ISAR成像新方法

A Novel ISAR Imaging Method Based on Coherent Integration CPF and NUFFT for Maneuvering Target

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