Software-defined radios (SDRs) have been around for more than a decade. The first complete Global Positioning System (GPS) implementation was described by Dennis Akos in 1997. Since then several research groups have presented their contribution

GPS接收图形界面如下图，打开串口接收数据，且LED灯亮，数据解析得到格林尼治时间、用户三维坐标、日期时间。-GPS receiving graphical interface below, open a serial port receives the data, and LED lights, data analysis, user get GMT three-dimensional coordinates, date/time.

GPS数据的选取及如何用单片机上在12864上显示坐标时间日期-GPS data on how to and use the microcontroller on the date and time display coordinates 12864