Navigation Satellite Passive Radar Moving Target Detection and SAR Imaging Based on FRFT
Pervasive Computing Signal Processing and Applications（2010）
摘要
Conventional radars have less invisibility, but the passive radars based on TV, FM signals also have some restrictions in SAR imaging by a range of issues such as ground electromagnetic environment and signal silence. This paper presents a new method of passive SAR imaging based on navigation satellite signal with single/multiple receive-only mode in FRFT domain. The received reflection of single multiple GPS signals from target is approximately linear FM signals which can be transformed by FRFT for signal frequency and Doppler frequency detection and estimation, especially for the target SAR imaging. Simulation results shown the effectiveness of the algorithm, and help to avoid the multi-target SAR imaging interference.
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关键词
passive radar,global positioning system,navigation satellite passive radar moving target detection,synthetic aperture radar,multitarget sar imaging interference,sar imaging,gps,frft,passive sar imaging,single multiple gps signal,frequency estimation,signal frequency,doppler radar,receive-only mode,navigition satellite signal,radar target recognition,navigation satellite signal,tv signal,ground electromagnetic environment,doppler frequency detection,multi-target sar imaging interference,linear fm signal,navigation satellite passive radar,target detection,object detection,signal silence,target sar imaging,doppler frequency estimation,radar imaging,image motion analysis,frequency modulation,satellites
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