利用北斗导航卫星信号进行目标成像目前还处于研究和探索阶段,为此针对北斗卫星B1和B3频段信号的特点设计了利用北斗地球静止轨道(geostationary earth orbit,GEO)卫星进行目标成像的算法;并进行了基于点目标成像的仿真实验.实验比较了B1和B3信号的目标成像效果.仿真实验结果表明能够利用北斗B1和B3信号进行目标成像;而且B3信号的成像分辨率优于B1信号.最后通过现场实验对直达和反射信号进行了研究,验证了利用北斗GEO卫星B3信号对目标进行探测和分辨的可行性.%Target imaging based on Beidou navigation satellite signals is still at the stage of research and exploration at present.Therefore, according to the characteristics of Beidou B1 and B3 band signals, target imaging algorithm was first designed for Beidou GEO satellites, then carries out simulation experiments of point target imaging and compares imaging effect between B1 and B3 signals.The simulation experimental results show that target can be imaged based on B3and B1 signal, and B3 signal is superior in imaging resolution to B1. At last, the direct and reflected signals collected from the field are studied, which verifies the feasibility of using Beidou GEO satellite B3 signal for target detection and resolution.
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