星载AIS检测概率建模与仿真分析

Modeling and simulation analysis of detection probability for space-based AIS

针对现有星载AIS检测概率低的问题,对星载AIS接收信号冲突和检测概率进行了研究和论证,并对影响检测概率的诸多因素进行了分析。分析了星载AIS与地面AIS的差异性,指出了星载AIS面临的新挑战。重点对星载AIS信号多网冲突问题进行了研究,建立了一种基于船舶分布密度函数的星载AIS检测概率模型。通过分析时隙冲突、船舶动态、轨道高度、天线类型和B类AIS船舶等因素对系统检测概率的影响,为工程设计和性能评估提供了一定参考依据。

Aiming at solving the low detection probability problem of space-based AIS,the received signal collision phenomenon and ship detection probability model were studied.The difference between Space-based AIS and traditional terrestrial AIS was compared and analyzed.And the new technical challenge of space-based AIS was pointed out.The problem of AIS signals collision from multi SOTDMA cells was studied in detail.The detection probability model based on ship density function was established theoretically.The effects of slot collision,orbit height,antenna swath and Class B ships on detection probability were estimated quantitatively by simulations,which can provide theoretical reference for designing and evaluating the space-based AIS in the future.