摘要
在GPS导航定位系统中,多普勒频率偏移直接影响接收机性能。为了克服多普勒频率偏移的影响,提高接收机的GPS信号捕获速度,结合多普勒频移原理,设计并实现了多普勒频移仿真系统。其中软件部分采用VC++6.0完成,硬件部分采用FPGA技术实现,通过计算机串口实现了软硬件之间通信,最后对多普勒频移系统进行了测试。测试结果证明了设计方案的正确性。
In the satellite navigation and positioning system Doppler frequency shift is the key problems that degrade the performance of satellite receiver. To overcome the influence of Doppler frequency shift and improve the speed of GPS signal acquisition, the paper first studies the algorithm of Doppler frequency shift estimation, and designs and implements GPS signal＇s Doppler frequency deviation. The software part is implemented by using VC＋＋6.0 soft platforms, and the hardware signal processing circuit board is realized by FPGA. The communication of software and hardware is realized via the serial ports. Finally, GPS signal＇s Doppler frequency deviation is tested. The test result proves the design scheme is right.
出处
《电脑与信息技术》
2011年第4期13-14,47,共3页
Computer and Information Technology
