1. 中国科学院电子学研究所微波成像技术国家级重点实验室,北京,100190
2. 中国科学院研究生院,北京,100190
3. 中国科学院电子学研究所微波成像技术国家级重点实验室北京,100190
4. 中国科学院研究生院北京,100190
纸质出版:2009
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寇蕾蕾, 王小青, 种劲松, 等. 地球同步轨道寄生SAR系统的若干关键技术研究[J]. 电子学报, 2009,37(12):2725-2729.
KOU Lei-lei, WANG Xiao-qing, CHONG Jin-song, et al. Research of Key Technologies in Geosynchronous Parasitic SAR System[J]. Acta Electronica Sinica, 2009, 37(12): 2725-2729.
地球同步轨道寄生SAR系统是利用地球同步轨道卫星传输的通信、导航等信号作为非合作照射源的一种双基地雷达系统
具有长时间观测目标区域、抗电子干扰、成本低等优势
有良好的发展前景.本文针对地球同步轨道寄生SAR系统发射源信号为连续随机信号且卫星航迹精确位置未知的特点
分析了脉冲重复周期和信号加窗长度的选取
研究了信号加窗后的满带宽、距离向信杂比问题以及卫星航迹的精确反演.最后
根据上述关键技术的研究分析
仿真实现了地球同步轨道寄生SAR系统成像.
Geosynchronous parasitic SAR system is a kind of bistatic system
which uses a fixed ground-based receiver and a geosynchronous satellite as non-cooperative illuminator transmitting waves like television
FM broadcast or navigation signals.The development of the system will be bright due to its military stealth
long-time supervising and economic advantages.The system has the characteristics of continuous random signal as transmitting signal and the precise positions of the radar unknown
based on which several key technologies for the parasitic system are discussed
including the ranges of pulse repetition time (PRT) and window length that limits transmitting signals
windowed signal full bandwidth and Signal to Clutter Ratios (SCR)
the retrieval of the satellite’s daily orbit.Finally
according to the above analysis the geosynchronous parasitic SAR imaging is accomplished by simulations.
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