RDSS卫星授时误差建模与仿真测试

RDSS定时终端在不同领域得到广泛应用,终端技术取得日新月异的变化,但是由于RDSS体制的特殊性,相关信号模拟器的国内研制相对滞后,不具备仿真功能,无法满足定时终端定时处理流程和算法的测试需求.因此,研制具有仿真模型的模拟器支持调试研发是当前终端测试的迫切需求.本文详述了基于RDSS卫星授时的原理,分析了动态信号的模拟要求,建立了卫星转发时刻、卫星轨道参数、目标运动轨迹、信号传输误差等仿真模型.信号源实测数据表明,各项指标满足测试需求.

Modeling and simulation testing of RDSS timing

As the technology of the receiver has been developing rapidly,due to the particular characteristics in RDSS and the lagging research on relatively signal simulator,the RDSS without simulation function is unable to satisfy the requirements of testing the receiver＇s timing arithmetic.Therefore,it is the requirement to design a simulator with simulation model to provide debugging and research support.Firstly,in this paper,the principle of RDSS satellite timing service is elaborated.Then the requirements of the dynamic navigation signals are analyzed.Finally,four mathematical models about time mode：the transmitting time model,the satellite ephemeris parameter calculation model,the target trajectory calculation model and the signal transmission error model are established to simulate the error corrections and the signals arriving at the receiver antenna.The results show that the RDSS signal simulator can satisfy receiver＇s test requirements.