【作者】 张坦； 王峰； 谭传瑞； 张嵩； 宋斌斌； 杨东凯；

【Author】 ZHANG Tan;WANG Feng;TAN Chuanrui;ZHANG Song;SONG Binbin;YANG Dongkai;School of Electronic Information Engineering,Beihang University;School of Aviation Combat Service Academy,Naval Aeronautical University;International Innovation Institute,Beihang University;

【机构】 北京航空航天大学电子信息工程学院； 海军航空大学航空作战勤务学院； 北京航空航天大学国际创新学院；

【摘要】 对利用星链卫星(Starlink)进行地球表面目标探测的可行性进行了研究,研究重点在于分析星链卫星的信号特性及其在目标探测中的分辨率能力。阐述了正交频分复用(OFDM)技术的基本原理以及其调制和解调的实现过程;针对星链卫星下行链路信号的特性进行分析,包括信号帧结构、时频特性、自相关函数和模糊函数的详细研究;通过设计具体的实验场景并进行仿真实验,对星链卫星下行链路信号在目标探测中的分辨率和定位能力进行了研究。研究结果表明,星链卫星下行链路信号具备高度的自相关性和良好的时频特性,使其在目标探测中具备高分辨率和精准的定位能力。更多还原

【Abstract】 This research explores the feasibility of utilizing Starlink satellites for earth surface target detection,focusing on the analysis of the satellite signal characteristics and their resolution capabilities in such applications.Initially,the study elucidates the fundamental principles of orthogonal frequency division multiplexing(OFDM)technology,including its modulation and demodulation processes,which are crucial for effective communication.Subsequently,an in-depth analysis of the Starlink satellite downlink signal characteristics is conducted,covering aspects such as signal frame structure,time-frequency properties,autocorrelation functions,and ambiguity functions.The research further investigates these signals’ resolution and positioning capabilities through specifically designed experimental scenarios and simulation experiments.The findings demonstrate that the Starlink satellite downlink signals exhibit high autocorrelation and favorable time-frequency characteristics,enabling high-resolution imaging and precise positioning in target detection tasks.These results underscore the potential of Starlink satellites in advanced earth observation and target detection applications.更多还原