一种结合时频分析与Dechirp技术提高运动目标参数估计精度的多通道方法

邓云凯; 刘亚东; 行坤; 祁海明; 陈倩

doi:10.3724/SP.J.1146.2010.00153

一种结合时频分析与Dechirp技术提高运动目标参数估计精度的多通道方法

doi: 10.3724/SP.J.1146.2010.00153

邓云凯^{① 刘亚东},
刘亚东,
行坤,
祁海明,
陈倩

基金项目:

国家部委基金和中国科学院优秀博士论文专项科研启动基金(0813260042)资助课题

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出版历程
- 收稿日期: 2010-02-11
- 修回日期: 2010-07-12
- 刊出日期: 2011-01-19

A High Accurate Method of Estimating Moving Targets Parameters Using Time-frequency Analysis and Dechirp Technology with Multi-channel

摘要

摘要: 传统相位中心偏置天线(DPCA)和沿迹干涉(ATI)方法无法解决动目标方位向速度引起的散焦对于动目标检测和参数估计带来的影响，而且无法对动目标方位向速度做出估计。为了解决这一问题，该文提出一种结合修正离散Chirp-Fourier变换(MDCFT)与去调频(Dechirp)技术的多通道动目标检测方法，通过对动目标多普勒参数的精确估计，完成对动目标的聚焦，从而提高动目标距离向速度和方位向位置的估计精度，同时还可以较精确地估计出动目标的方位向速度，弥补了DPCA和ATI方法的不足。理论分析和计算机仿真结果验证了该方法的有效性。
- 合成孔径雷达 /
- 地面运动目标检测 /
- 时频分析 /
- 修正离散Chirp-Fourier变换 /
- 去调频
Abstract: Traditional approaches, such as the Displaced Phase Center Antenna (DPCA) and Along Track Interferometer (ATI), fail to mitigate the negative impact on the detection of?a target and the estimation of the parameters due to the defocus problem associated with the targets azimuth velocity. In addition, these two approaches also fall short in estimating the targets azimuth velocity. To solve above problems, this paper proposes a multi-channel moving target detection method which combines the time-frequency analysis method of Modified Discrete Chirp-Fourier Transformation (MDCFT) and dechirp technology. Through accurately estimating?a moving target's doppler parameters, the proposed method can realize the focusing of?the moving target. As a result, the accuracy of estimation on the moving targets radical velocity, azimuth position, as well as azimuth velocity can be significantly improved. In all, the proposed method can overcome the disadvantages of the traditional DPCA and ATI approaches, and the e fectiveness of the proposed method is proved through both theoretic analysis and compute simulation.
- SAR /
- GMTI (Ground Moving Target Indication) /
- Time-frequency analysis /
- MDCFT (Modified Discrete Chirp-Fourier Transformation) /
- Dechirp

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参考文献(1)

Raney R K. Synthetic aperture imaging radar and moving targets[J].IEEE Transactions on Aerospace and Electronic Systems.1971, 7(3):499-505[2]Lightstone L, Faubert D, and Rempel G. Multiple phase center DPCA for airborne radar. Proceedings of the 1991 IEEE National Radar Conference, US, 1991: 36-40.[3]Kohlleppel R and Gierull Christoph H. Enhancement of along-track interferometry for ground moving target indication. IGARSS, 2008, Boston, USA, July 7-11, 2008: II-229-II-232.[4]Brennan L E and Reed I S. Theory of adaptive radar[J].IEEE Transactions on Aerospace and Electronic Systems.1973, 9(2):237-252[5]Suchandt S and Runge H, et al.. First results of ground moving target analysis in TerraSAR-X data. Proceedings of EUSAR 2008, Friedrichshafen, Germany, June 2008: 55-58.[6]Livingstone C E, Sikaneta I, Gierull C H, and Chiu S, et al.. An airborne Synthetic Aperture Radar (SAR) experiment to support RADARSAT-2 Ground Moving Target Indication (GMTI). Canadian Journal of Remote Sensing, 2002, 28(6): 794-813.[7]郑明洁, 杨汝良. 基于DPCA和干涉技术的SAR动目标检测[J].电子与信息学报.2003, 25(11):1525-1530浏览Zheng Ming-jie and Yang Ru-liang. SAR moving targets detection based on DPCA and interfereometric processing. Journal of Electronics and Information Technology, 2003, 25(11): 1525-1530.[8]Ding Y, Xue N, and Munson D C Jr. An analysis of time-frequency methods in SAR imaging of moving targets. Sensor Array and Multichannel Signal Processing Workshop. Proceedings of the 2000 IEEE, March 16-17, 2000: 221-225.[9]孙泓波，郭欣，顾红，等. 修正离散Chirp-Fourier 变换及其在SAR动目标检测中的应用. 电子学报，2003, 31(1): 25-28.Sun Hong-bo, Guo Xin, and Gu Hong, et al.. Modified discrete Chirp-Fourier transform and its application to SAR moving target detection. Acta Electronica Sinica, 2003, 31(1): 25-28.[10]Xia Xiang-gen. Discrete Chirp-Fourier transform and its application to chirp rate estimation. IEEE Transaction on Signal Processing, 2000, 48, SP-48(11): 3122-3133.[11]保铮，邢孟道，王彤. 雷达成像技术. 电子工业出版社，2005: 31-37.[12]Bao Zheng, Xing Meng-dao, and Wang Tong. Radar Imaging Technology. Electronics Industry Press, 2005: 31-37.[13]李亚超，周峰，邢孟道，保铮. 一种直升机的舰船Dechirp实测数据SAR成像方法[J].电子与信息学报.2007, 29(8):1794-1798浏览Li Ya-chao, Zhou Feng, Xing Meng-dao, and Bao Zheng. An effective method for ship Dechirp data imaging inhelicopter SAR System. Journal of Electronics and Information Technology, 2007, 29(8): 1794-1798.[14]Liu Ai-fang, Zhu Xiao-hua, Lu Jin-hui, and Liu Zhong. The ISAR range profile compensation of fast-moving target using the Dechirp method. IEEE Int. Conf. Neural Networks Signal Processing, Nanjing, China, 2003 Vol, 2: 1619 -1623.[15]杨垒, 王彤, 邢孟道, 保铮. 机载多通道SAR-GMTI的杂波抑制方法[J].电子与信息学报.2008, 30(12):2831-2834浏览Yang Lei, Wang Tong, Xing Meng-dao, and Bao Zheng. The clutter suppression method of airborne multi-channel SAR-GMTI system. Journal of Electronics and Information Technology, 2008, 30(12): 2831-2834.[16]Shufen M A. Doppler frequency extraction and estimation of range and speed of moving target. 9th International Conference on Signal Processing, Germany, Oct. 26-29, 2008: 2636-2639.[17]史洪印，周荫清，陈杰. 同步轨道星机双基地三通道SAR地面运动目标指示算法[J].电子与信息学报.2009, 31(8):1881-1885浏览Shi Hong-yin, Zhou Yin-qing, and Chen Jie. An algorittam of GEO spaceborne-airborne bistatic three-channel SAR ground moving target indication. Journal of Electronics and Ingotmation Techrology, 2009, 31(8): 1881-1885.[18]邓海涛，张长耀. 一种机载三通道GMTI实时信号处理方法[J].电子与信息学报.2009, 31(2):370-373浏览Deng Hai-tao and Zhang Chang-yao. A real-time singnal processing method for air-born three-channels GMTI. Journal of Electronics and Information Technology, 2009, 31(2): 370-373.

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