機(jī)載干涉SAR/ISAR對地面慢速目標(biāo)成像研究
Studies of ground slow-moving target imaging by airborne interferometric sar/isar
-
摘要: 該文研究用機(jī)載干涉SAR/ISAR技術(shù)對地面慢速目標(biāo)成像，該技術(shù)利用SAR成像的距離和橫向距離高分辨率，以及干涉儀的空域?qū)ο?，實現(xiàn)雜波抑制，提高信雜比。動目標(biāo)的真實方位由相位比較干涉儀測定。進(jìn)而用ISAR處理得到慢速目標(biāo)的高分辨圖像。文中詳細(xì)討論了機(jī)載干涉SAR/ISAR系統(tǒng)框圖和工作原理，并導(dǎo)出了該系統(tǒng)中SAR、干涉儀空域?qū)ο蜏y向以及ISAR處理的定量關(guān)系式。理論分析和初步計算機(jī)仿真證明了這項技術(shù)的正確性。Abstract: In this paper, ground slow-moving target imaging via airborne interferometric SAR/ISAR technique is investigated. Land clutter suppression and SCR improvement are achieved by range and cross-range two-dimensional high resolution of SAR. imaging and spatial domain cancellation of interferometer. True azimuth of moving target is determined using phase-comparison interferometer. Furthermore, high resolution image of the slow-moving target is obtained by IS AR processing. The block diagram and the operational principle of the airborne interferometric SAR./ISAR system are discussed in detail. Quantitative relations for SAR,, interferometer spatial domain cancellation, direction finding and ISAR processing are derived. Theoretical analysis and preliminary computer simulation reveal the validity of this technique.
-
J.C. Henry, T. J. Murphy, A Lincoln laboratory technique for the ultra-high resolution imaging of moving target, Proc. of the SPIE, Orlando, Florida, 2487, 1995, 359-370.[2]E.F. Stockburger, D. N. Held, Interferometric moving ground target imaging, Proc. of the IEEE International Radar Conference, Alexandria, Virginia, 1995, 438-443.[3]M. Tobin, Real time simultaneous SAR/GMIT in a tactical airborne environment, Proc. of EUSAR, Konigswinter, Germany, 1996, 63-66.[4]M.T. Fennell, R. P. Wishner, Battlefield awareness via synergistic SAR and MIT exploitation,IEEE AES Magazine, 1998, 13(2), 39-45.[5]C.V. Jackowatz, D. E. Wahl, P. H. Eichel, et al., Spotlight-Mode Synthetic Aperture Radar, A Signal Processing Approach, Boston, Kluwer Academic Publishers, 1996, Ch.5. ［6］D.A. Ausherman, A. Kozma, J. L. Walker, ct al., Developments in radar imaging, IEEE Trans.on AES, 1984, AES-20(4). 336-340. -
計量
- 文章訪問數(shù): 2381
- HTML全文瀏覽量: 83
- PDF下載量: 605
- 被引次數(shù): 0
下載:
