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Vol. 164, Issue 2, February 2014, pp. 176-181




Design of DGPS Receiver Based on the Net of VRS

Yun XU, Xin Hua ZHU, Yu WANG, Yan SU

School of Mechanical Engineering, Nanjing University of Science and Technology, 210094, China
Tel.: +86 13601404770, fax: +86 2584303258

E-mail: zhuxinhua@njust.edu.cn


Received: 29 October 2013 /Accepted: 27 December 2013 /Published: 28 February 2014

Digital Sensors and Sensor Sysstems


Abstract: To improve the positioning accuracy of the GPS system, the differential technology based on real time kinematic is utilized. Comparing with the conventional differential technology, the differential technology based on the virtual reference station can minimize the size of the rover station which is of great significance for the small system such as the mini-type unmanned vehicle, smart ammunitions and so on. Due to the high cost of the GPS receivers in the market which canít be redeveloped and the limitation of their interface, it is not suitable for the application of the embedded system. In this paper, the receiver based on the aforementioned method is proposed to realize the real time differential positioning. Firstly, the concept of differential positioning based on real time kinematic is explained. Next, the composition of the virtual reference system and its working principle are introduced. And then, the design of differential GPS receiver based on the virtual reference system for rover station is illustrated. Finally, from the repeatability test, the result shows that by means of getting the differential corrections from the virtual reference station, the designed differential GPS receiver can correct the errors caused by ionosphere, troposphere and atmospheric refraction. Moreover, it can improve the positioning accuracy to centimeter-level. With low cost, small size and convertibility of the interface of the designed differential GPS receiver according to the embedded system, it will be popular in the future market.


Keywords: Real time kinematic, Virtual reference system, Differential GPS receiver, Rover station, Embedded system.


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