全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
电子学报  2008 

舰载高频地波雷达(OTHR)平台运动对回波信号调制机理的研究

, PP. 109-113

Keywords: 舰载SWR,展宽谱,一阶Bragg海浪,展宽谱中的信号分辨

Full-Text   Cite this paper   Add to My Lib

Abstract:

本文基于高频地波舰载OTH(Over-The-Horizon)雷达后向散射回波信号的物理模型,在理论上分析并导出了揭示雷达平台运动、雷达系统参数、目标物理属性以及目标运动特性之间内在联系的舰载高频地波OTH雷达回波信号在Doppler域里的频谱展宽方程;深入分析了高频地波舰载OTH雷达平台运动对雷达回波信号高频相位的调制机理及平台运动对回波信号Doppler频谱结构的影响;推导了雷达平台运动与不同物理尺寸目标及不同运动状态目标相互作用的动态几何关系;给出了在雷达平台运动条件下静止面目标、静止点目标及运动面目标和运动点目标的回波信号频谱展宽表达式.这些基本关系式构成了在高频地波舰载OTH雷达系统中对海浪杂波特性和目标特性进行分析和研究及在展宽的一阶Bragg海浪谱中实现舰船目标分辨与检测的重要理论基础.文章最后通过对实测数据的分析与测量,证明了所得出的数学关系式的正确性.

References

[1]  L R Wyatt.The measurement of the ocean wave directional spectrum from HF radar Doppler spectra[J].Radio Science,1986,21(1):473-485.
[2]  R Khan,et al.Target detection and tracking with a high frequency ground wave radar[J].IEEE Journal of Oceanic Engineering,1994,19(4):540-548.
[3]  D E Barrick.The interaction of HF/VHF radio waves with the sea surface and its implications[A].In Proc Electromagnetic of the Sea,AGARD''77[C].Pans,France,1970.18.1-18.25.
[4]  L R Wyatt.Progress in the interpretation of HF sea echo:HF radar used as a remote sensing tool[J].Proc Inst Elect Eng,Part F,1990,137(2):139-147.
[5]  G L Tyler,et al.Wave directional spectra from synthetic aperture observations of radio scatter[J].Deep-Sea Research,1974,21:989-1016.
[6]  B J Lipa,D E Barrick.Extraction of sea state from HF radar sea echo:mathematical theory and modeling[J].Radio Science,1986,21(1):81-100.
[7]  D D Crombie.Doppler spectrum of sea echo at 13.56 Mc/s[J].Nature,1955,175:681-682.
[8]  D E Barrick.The theory of ground-wave propagation across a rough sea at decameter wavelengths[R].Res Rep AD 865 840,134pp,Battelle Memorial Institute,Colum-bus,Ohio,1970.
[9]  E C Ha.Remote seining of ocean surface current and current shear by HF backscatter radar[R].Tech Rep D415-1 (SEL-79-022),Radio Sci Lab,Stanford Electron Lab,Stanford Calif,August 1979.
[10]  袁业术,段风增,等.雷达平台运动引起Bragg海浪谱的展宽及其压缩方法[J].现代雷达,1998,20(5):8-14.
[11]  Junhao Xie,Yeshu Yuan,Yongtan Liu.Suppression of sea clutter with orthogonal weighting for target detection in shipborne HFSWR[J].IEE Proc.-Radar Sonar&Navigation,2002,149(1):39-44.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133