【摘要】 AIS信号冲突问题的研究是星载AIS系统研究中的一个重要课题。为研究AIS冲突信号的解决方案,不可避免地需要获取星载AIS系统的信号源数据。然而向国外购买数据或者自行发射卫星这2种途径成本高、耗时长,所以利用计算机平台设计实现星载AIS信号模拟源成为最佳选择。根据卫星监测范围内船舶发送的AIS信号到达卫星的时间、多普勒频偏以及功率衰减等参数信息,模拟产生卫星天线接收到的冲突信号,仿真实现了星载AIS信号模拟源,为进一步研究星载AIS冲突信号解调算法提供了帮助。更多还原

【Abstract】 How to resolve the problem of AIS signals collision is an important subject in the study of space-based AIS system. In order to research the solution of the problem,it’s necessary to obtain the space-based AIS signals. However,to purchase from abroad or launch a satellite to get the space-based AIS signals is high-cost and time-consuming. In this case,the best choice is to design a simulator in computer. In this paper,a space-based AIS signal simulator which can simulate the signals received by satellite antenna is designed. According to the characteristics of received signal,such as time of arrival,Doppler shift,power attenuation,etc.,the simulator is implemented. The AIS signal simulator provides an important help for the solution research of AIS signals collision problem.更多还原