The Design Of GPS/Compass Signal-collecting,Acquisition And Tracking System

Satellite navigation has been widely used in aerospace,civil engineering,weather forecasting,geography industry information,telecommunications,tourism,entertainment and other fields,which showing great potential.The basic functions of the satellite navigation system is to provide position,velocity and time information in real time to the various user platforms,the accuracy of signal-collecting have a direct impact on satellite signal acquisition,tracking,and the solution of positioning.On the basis of in-depth understanding of GPS/Compass signal-collecting,acquisition and tracking system,using the USB board which depend on FPGA to set up the hardware platform.Via the USB bus upload data which collected through the hardware platform to the host computer.Designing the software platform which depended on the software receiver,using the code phase searching and acquisition algorithm which based on the parallel FFT to acquire the GPS/Compass signal,and analysis the difference of the GPS/Compass signal-collecting.Basing on the hardware and software platform,through setting the different sampling frequency,signal strength to analysis the difference of the signal-collecting,to arrive at the impact on the test results of acquisition and tracking.And according to the result of analysis,the system meet the request of signal-collecting,acquisition and tracking.