基于FPGA+DSP实现高动态GPS信号模拟器

High Dynamic GPS Signal Simulator Based on FPGA+DSP

为了测试全球定位系统(GPS)接收机在多种运动模式且高保真的环境中的性能,利用已有的星历和用户设定的参数,计算模拟载波和码多普勒频率和卫星信号延迟,进而在FPGA+DSP架构的硬件平台上,模拟GPS接收机接收到的GPS卫星信号。通过GPS接收机测试模拟器信号的定位结果与模拟器预先设定的轨迹相比较,其结果表明:高动态GPS信号模拟器能准确模拟多种运动模式下GPS卫星信号。

For the purpose of testing the performances of Global positioning system （GPS） receivers in movement patterns of a wide range and high-fidelity environments, high dynamie GPS signal simulators are designed based on computing the Doppler frequency of the simulation of carrier and code and the delay of satellite signals by using existing ephemeris and users-set parameters, which are simulated in the environment of FPGA and DSP. The simulated signal is processed by GPS receivers, positioning results compared with the track of simulation show that high dynamic GPS signal simulators can accurately simulate GPS satellite signals with multiple movement mode.