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清华大学学报(自然科学版)  2014, Vol. 54 Issue (4): 464-468    
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基于迭代Radon-Wigner变换的FMCW-ISAR目标速度估计及速度补偿
常雯,李增辉,杨健()
Velocity estimation and compensation in FMCW-ISAR based on the iterative Radon-Wigner transform
Wen CHANG,Zenghui LI,Jian YANG()
Department of Electronic Engineering, Tsinghua University, Beijing 100084, China
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摘要 

在调频连续波逆合成孔径雷达(FMCW -ISAR)成像系统中,目标在扫描周期内的高速运动导致目标一维距离像的畸变及二维成像的模糊。为了获得高质量的ISAR目标成像结果,需对高速目标进行速度估计及补偿。该文针对FMCW-ISAR系统信号模型,提出了一种基于迭代Radon -Wigner变换对高速非合作目标进行速度估计和速度补偿的方法。仿真结果表明: 该方法能够对高速非合作目标的速度进行高精度估计,距离向和方位向速度补偿后可获得理想的ISAR成像结果。

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关键词 调频连续波(FMCW)逆合成孔径雷达(ISAR)Radon-Wigner变换速度估计速度补偿    
Abstract

In FMCW-ISAR system, fast-moving targets during the sweep repetition interval results in range profile aberrations and 2-D image blurring. Thus, velocity compensation is needed to acquire good ISAR image quality. This paper presents a method based on the iterative Radon-Wigner Transform to estimate the velocity and compensate for the signal model in FMCW-ISAR systems. Simulations show that the method gives accurate velocity estimates and much better 2-D FMCW-ISAR images by using velocity compensation for both the range and azimuth.

Key wordsfrequency modulation continuous wave (FMCW)    inverse synthetic aperture radar (ISAR)    Radon-Wigner transform    velocity estimation    velocity compensation
收稿日期: 2013-10-31      出版日期: 2014-04-15
基金资助:国家自然科学基金面上项目 (61271417)
引用本文:   
常雯,李增辉,杨健. 基于迭代Radon-Wigner变换的FMCW-ISAR目标速度估计及速度补偿[J]. 清华大学学报(自然科学版), 2014, 54(4): 464-468.
Wen CHANG,Zenghui LI,Jian YANG. Velocity estimation and compensation in FMCW-ISAR based on the iterative Radon-Wigner transform. Journal of Tsinghua University(Science and Technology), 2014, 54(4): 464-468.
链接本文:  
http://jst.tsinghuajournals.com/CN/  或          http://jst.tsinghuajournals.com/CN/Y2014/V54/I4/464
  Radon变换的几何关系
  发射、接收信号时频图
  仿真模型
参数 数值
初始频率f0 8 GHz
带宽B 1 024 MHz
扫频周期T 4 ms
采样率Fs 32 kHz
目标转动角速度ω 0.125 rad/s
  仿真参数表
  不同速度单散射点的一维距离像
  速度补偿前不同速度目标的FMCW-ISAR成像结果
v/(m·s-1) i v^/(m·s-1) Δv/(m·s-1)
100 2 100.775 6 0.77
500 3 493.650 0 6.35
1×103 2 992.450 7 7.55
5×103 3 4.996 9×103 3.10
1×104 3 1.000 2×104 2.00
  迭代Radon-Wigner变换法估计速度
  速度补偿前后单散射点的一维距离像
  速度补偿后不同v下目标的FMCW-ISAR成像结果
[1] Stove A G. Linear FMCW radar techniques [J]. IEE Proceedings F, Radar Signal Processing, 1992, 139(5): 343-350.
[2] MetaA, Hoogeboom P, Ligthart L P. Signal processing for FMCW SAR[J]. IEEE Transaction on Gieoscience and Remote sensing, 2007, 45(11): 3519-3532.
[3] WANG Robert, LUO Yunhua, DENG Yunkai, et al.Motion compensation for high-resolution automobile FMCW SAR[J]. IEEE Gieoscience and Remote sensing Letter, 2013, 10(5): 1157-1161.
[4] Ribalta A. Time-domain reconstruction algorithms for FMCW-SAR[J]. IEEE Gieoscience and Remote sensing Letter, 2011, 8(3): 396-400.
[5] Giusti E, Martorella M. Range Doppler and image autofocusing for FMCW inverse synthetic aperture radar[J]. IEEE Transaction on Aerospace and Electronic Systems, 2011, 47(4): 2087-2823.
[6] ZHU Xiaopeng, ZHANG Qun, LI Hongwei. ISAR imaging analysis of bistatic FMCW radar [C]// Proceedings of International Symposium on Antennas Propagation and EM Theory(ISAPE). Guangzhou, China: IEEE, 2010: 540-543.
[7] CHANG Wen, LI Zenghui, JIN Kan, et al.Imaging of space targets in FMCW-ISAR [C]// Proceedings of International Radar Conference. Xi'an, China: Institution of Engineering and Technology, 2013: 1-4.
[8] Cohen L. Time-frequency distribution: A review[J]. Proceedings of the IEEE, 1989, 77(7): 941-981.
[9] Wood J C, Barry D T. Radon transformation of time-frequency distributions for analysis of multicomponent signals[J]. IEEE Transactions on Signal Processing, 1994, 42(11): 3166-3177.
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