GPS L5模拟器基带信号的生成

摘要

全球定位系统（GPS）现代化的一项重要内容是增加 L5频点。目前天上只有五颗Block II F卫星可以发射L5信号，限制了新型接收机的研制与测试。卫星信号模拟器根据载体运动轨迹产生GPS信号，为GPS接收机提供逼真的仿真信号，因此，研制GPS L5信号模拟器非常必要。在模拟器的研制中，上位机基带信号的产生是关键。本文在研究 L5信号结构的基础上，利用软件编程产生 L5基带信号，用软件接收机验证了产生信号的正确性。%Broadcasting L5 frequency is an important aspect of the GPS modernization.However,the L5 link is only available on Block IIF and the subsequent Blocks of SVs at mo-ment.It has certain restrictions on the research of new receivers.Satellite signal simulatorcan produce GPS signals to receiver based on vector trajectory.Therefore,it is very necessa-ry to research the GPS L5 band signal simulator.After studying structures of L5 signal,wegenerated L5 baseband signals using software programming,then made use of software re-ceiver to test the performance of the generated signal.The ideal results proved the validityand practical of the signal.