一种高精度的GPS-RTK定位技术设计与实现

A high precision location technology design and implementation of GPS-RTK

传统的实时动态(Real Time Kinematic,RTK)定位技术通过数传电台在基准站与流动站之间传输差分数据,这样传输距离有限并且容易受到外界因素的干扰,从而影响定位精度。提出以S5PV210微处理器为核心,在Linux嵌入式平台下采用3G无线通信技术在流动站与CORS中心建立数据链,实现了一种实用的RTK定位技术。介绍了终端机的系统结构及工作原理,阐述了硬件模块和软件系统的实现方法。该系统具有数据传输稳定、定位精度高、实用性强等特点。测试结果表明,该终端运行稳定并可以达到厘米级的定位精度。

The conventional Real Time Kinematic（RTK） location technology utilizes radio modem to transmit differential data between base station and mobile station. In this case, the transmission distance is limited and the location precision can be easily affected by external factors. In this paper, a practical RTK location technology which adopts 3 G wireless communication technology to establish data link between mobile station and Continusly Operating Reference Station（ CORS） center is proposed. The technology is implement-ed in S5 PV210 microprocessor and Linux embedded system. This paper introduces the system architecture and operating principle of the terminal, and elaborates the methods to implement the hardware module and software module. The system has characters of good reliability, high precision and strong practicability. Test results show that the terminal is reliable and robust with centimetre-level location precision.