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基于去調(diào)頻寬帶LFM信號的二次距離壓縮算法及其實時實現(xiàn)

姚萍,  張濤,  李明峰,  王貞松

姚萍, 張濤, 李明峰, 王貞松. 基于去調(diào)頻寬帶LFM信號的二次距離壓縮算法及其實時實現(xiàn)[J]. 電子與信息學報, 2004, 26(2): 183-187.
引用本文: 姚萍, 張濤, 李明峰, 王貞松. 基于去調(diào)頻寬帶LFM信號的二次距離壓縮算法及其實時實現(xiàn)[J]. 電子與信息學報, 2004, 26(2): 183-187.
Yao Ping, Zhang Tao, Li Ming-feng, Wang Zhen-song. SRC Imaging Method of De-chirped Broadband LFM Signal and Its Real Time Implementation[J]. Journal of Electronics & Information Technology, 2004, 26(2): 183-187.
Citation: Yao Ping, Zhang Tao, Li Ming-feng, Wang Zhen-song. SRC Imaging Method of De-chirped Broadband LFM Signal and Its Real Time Implementation[J]. Journal of Electronics & Information Technology, 2004, 26(2): 183-187.

基于去調(diào)頻寬帶LFM信號的二次距離壓縮算法及其實時實現(xiàn)

SRC Imaging Method of De-chirped Broadband LFM Signal and Its Real Time Implementation

  • 摘要: 該文在基于匹配濾波的二次距離壓縮算法(SRC)基礎上，通過對去調(diào)頻的線性調(diào)頻(LFM)信號的時、頻域關系的分析，給出基于去調(diào)頻LFM信號的SRC算法，與距離多普勒算法(RD)和普通LFM信號SRC算法對比，分析該算法的運算量，說明該算法適合于去調(diào)頻體制SAR實時成像處理。對于去調(diào)頻SAR數(shù)據(jù)采用該算法壓縮得到清晰的圖像，同時對比斜視下SRC與RD成像的結(jié)果。驗證了在高分辨率實時成像時SRC算法優(yōu)于RD算法。
    Abstract: Based on the analysis of the time and frequency domain character of the de-chirped broadband LFM signal, this paper presents the SRC imaging method of S AR with de-chirped LFM signal. In comparison with the RD and SRC method of normal LFM signal with the same swath and resolution, this method is proved suitable for real time processing with a decrease of data to be processed and a little amount of calculation increased. Data collected in de-chirp LFM SAR system is formed into images with this method and demonstrates it is better than RD to form fine-resolution images when there exits a squint angle in SAR system, which is usually the case in reality.
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  • Jin Y, Wu Chialin. A SAR correlation algorithm which accommodates large-range migration.IEEE Trans. on Geosci. Remote Sensing, 1984, 22(6): 592-597.[2]Wu Chialin, Liu K Y, Jin Michael. Modeling and a correlation algorithm for spaceborne SAR signals[J].IEEE Trans. on Aerospace andElectronic Systems.1982, 18(5):563-575[3]Raney R K, Runge H, Bamler R, Cumming Ian G, Wong F H. Precision SAR processing using chirp sacling[J].IEEE Trans. Geosci. Remote Sensing.1994, 32(4):786-798[4]Curlander J C.[J].McDonough R N. Synthetic Aperture Radar Systems and Signal Processing. New York, John Wiley Sons.1991,:-[5]Bennett J R, Cumming I G, Deane R A. The digital processing of Seasat synthetic aperture radar data. IEEE International Radar Conference, Washington, DC., 1980: 168-175.Wu Chialin. A digital fast correlation approach to produce Seasat SAR imagery. IEEE International Radar Conference, Washington, DC., 1980: 183-189.[6]Carrara W G, Goodman R S, Majewski R M. Spotlight Synthetic Aperture Radar Signal Processing Algorithms. Boston, Artech House, 1995: 27-30, 501-506.[7]Oppenheim A V, Willsky A S, Nawab S H. Signals Systems. Prentice-Hall International, Inc.,1998: 284-400.
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出版歷程
  • 收稿日期:  2002-08-30
  • 修回日期:  2003-01-20
  • 刊出日期:  2004-02-19

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