基于频域分析的ROSAR成像算法

杨科; 廖桂生; 徐青; 张向阳

基于频域分析的ROSAR成像算法

西安电子科技大学雷达信号处理国家重点实验室, 西安 710071

基金项目: 国家973计划资助项目(2011CB707001);国家自然科学基金资助项目(61101242);中央高校基本科研业务费专项资金资助项目(K50511020009)

详细信息

中图分类号: TN957.52
计量
- 文章访问数: 1682
- HTML全文浏览量: 265
- PDF下载量: 634
- 被引次数: 0
出版历程
- 收稿日期: 2011-10-20
- 网络出版日期: 2012-09-30

ROSAR imaging algorithm based on frequency analysis

National Lab of Radar Signal Processing, Xidian University, Xi'an 710071, China

摘要

摘要: 在现有的ROSAR(Synthetic Aperture Radar with Rotating antennas)成像算法中,基于斜距泰勒级数展开的算法存在方位向失配问题,时域相关卷积算法不能快速校正距离弯曲.频域ROSAR成像算法采用驻相点原理,直接对ROSAR回波信号进行二维频域变换,保留回波信号的频谱特征,进而构造相应的频域去耦函数和频域匹配函数,实现频域距离弯曲校正和目标场景重构.仿真结果表明,该算法能够快速校正距离弯曲及有效克服方位向失配问题.
- 旋转式合成孔径雷达 /
- 频域成像 /
- 驻相点原理 /
- 弯曲校正
Abstract: In the existing imaging algorithms for synthetic aperture radar with rotating antennas (ROSAR), the methods based on the Taylor series expansion of the slant range suffer from mismatch problems in azimuth. In addition, the time-domain convolution method cannot rapidly correct the curvature. In the proposed ROSAR imaging algorithm in frequency domain, the echo was transformed into the two-dimension frequency domain directly using the stationary phase principle. In this case, spectral characteristics of the echo signal were retained completely. Thus, the correspondent decoupling function and matching function in frequency domain were constructed to achieve the range curvature correction and scene reconstruction. Simulation results demonstrate that the proposed algorithm can perform the curvature correction rapidly. Furthermore, the proposed algorithm can overcome the mismatch problems in azimuth effectively.
- synthetic aperture radar with rotating antennas(ROSAR) /
- frequency-domain imaging /
- stationary phase principle /
- curvature correction

HTML全文

参考文献(11)

[1]	Klausing Helmut,Keydel Wolfgang.Feasibility of a synthetic aperture radar with rotating antennas (ROSAR)//Record of the IEEE 1990 International Radar Conference.New York:Institute of Electrical and Electronics Engineers,Inc,1990:51-56
[2]	孙兵,周荫清,陈杰,等.广域观测圆轨迹环扫SAR成像模式研究[J].电子与信息学报,2008,30(12):2805-2808 Sun Bing,Zhou Yinqing,Chen Jie,et al.Operation mode of circular trace scanning SAR for wide observation [J].Journal of Electronics & Information Technology,2008,30(12):2805-2808(in Chinese)
[3]	Dmitriy S Garmatyuk,Ram M Narayanan.Ultra-wideband continuous-wave random noise arc-SAR [J].IEEE Transactions on Geoscience and Remote Sensing,2002,40(12):2543-2552
[4]	Faiza Ali,Alexander Urban,Martin Vossiek.A high resolution 2D omnidirectional synthetic aperture radar scanner at K band//Proceedings of the 7th European Radar Conference.London:Horizon House Publications Ltd,2010:503-506
[5]	Bara M,Sagues L,Paniagua F,et al.High-speed focusing algorithm for circular synthetic aperture radar (C-SAR) [J].IEEElectronics Letters,2000,36(9):828-830
[6]	Wang Robert,Loffeld Otmar,Nies Holger,et al.Image formation algorithm for bistatic forward-looking SAR//2010 IEEE International Geoscience and Remote Sensing Symposium (IGARSS).Piscataway:IEEE Press,2010:4091-4094
[7]	Thomas Espeter,Ingo Walterscheid,Jens Klare,et al.Bistatic forward-looking SAR:results of a spaceborne-airborne experiment [J].IEEE Geoscience and Remote Sensing Letters,2011,8(4): 765-768
[8]	Krieger G,Mittermayer J,Wendler M,et al.SIREV-sector imaging radar for enhanced vision//Proceedings of the 2nd International Symposium on Image and Signal Processing and Analysis.Piscataway:IEEE Press,2001:377-382
[9]	Ren Xiaozhen,Sun Jiantao,Yang Ruliang.A new three-dimensional imaging algorithm for airborne forward-looking SAR [J].IEEE Geoscience and Remote Sensing Letters,2011,8(1):153-157
[10]	Lee Hoonyol,Cho Seong-Jun,Kim Kwang-Eun.A ground-based arc-scanning synthetic aperture radar (arc-SAR) system and focusing algorithms//2010 IEEE International Geoscience and Remote Sensing Symposium (IGARSS).Piscataway:IEEE Press,2010:3490-3493
[11]	保铮,邢孟道,王彤.雷达成像技术[M].北京:电子工业出版社,2005:65-66 Bao Zheng,Xing Mengdao,Wang Tong.Radar imaging techniques [M].Beijng:Publishing House of Electronics Industry,2005:65-66 (in Chinese)