DGPS 보전신호 전송을 위한 휴대전화 인터페이스 모듈의 설계 및 구현

Abstract

The conventional RTK-GPS technique has many problems which are generated by using RF wireless modem, influence of geographic obstacle due to radio wave, frequency interference, and finiteness of frequency resources.

To solve these problems, in this paper, we designed a transmission system for DGPS correction message as a method interface module to substitute the RF wireless modem of RTK-DGPS. Then the interface module was designed and implemented for linkage between GPS receiver and mobile phone.

We made hardware module using PIC(Programmable Integrated Circuit) for interface module, and we used PC-CDU(JAVAD Navigation system ver. 2.1.10) program for precision of systems.

As a result, we conformed the interface module was received transmission correction message through RS-232C and communication control, and users of rover station were worked differential surveying using receiving correction message between mobile phones. Interface module system was received the same result compared to precision of conventional RF wireless modem system.