摘要
研究优化GPS导航系统仿真器设计,要实现一种便携式GPS卫星信号仿真器。由于系统要求实时性强和定位精度高,嵌入式ARM+DSP+FPGA的硬件架构的仿真器平台有限的运算和存储能力不能满足要求,因此提出了GPS轨道仿真的三次样条插值仿真算法,运算量小、计算速度快、误差小,同时采用模块化设计并预留接口,方便扩展开发,可作为多种卫星的仿真器。进行仿真的结果表明,实现了GPS复杂系统仿真的实时性,仿真信号频谱特性较好,定位准确,可为导航系统设计和军用实验提供了可靠依据。
The paper designed and implemented a kind of portable GPS signal simulator based on embedded ARM/DSP and FPGA. Cubic spline numerica method, with high computation ability and low error was proposed to simulate GPS satellite orbits. Meanwhile, the modularization design can be easily extended to Muhi - Mode Satellite signal simulator. The implementation of complex GPS signal simulator was validated by commercial receiver. Compared with usual simulators based on PC, this one is smaller, lighter and more convenient to be used. It can provide a standard signal for receiver production lines and military experiment.
出处
《计算机仿真》
CSCD
北大核心
2012年第2期36-39,88,共5页
Computer Simulation
