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| A RFID Based Traffic Information Acquisition System and Vehicle Positioning Method |
| Zhao Tai-yang Guo Cheng-an Jin Min-lu |
| School of Electronic and Information Engineering, Dalian University of Technology, Dalian 116024, China |
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Abstract Vehicle positioning method is a hot research topic for many years. In this paper, an ITS (Intelligent Transportation System) based on RFID is proposed, including the structure and communication protocol. A novel vehicle positioning method, based on the Time Difference of Arrival (TDOA) is proposed. This vehicle positioning method is a two-step robust positioning method. The rough position of a vehicle can be estimated by a robust estimation in the first step. Then the three base stations which are closest to the vehicle can be found, and the two TDOA of these three base stations are employed to calculate the vehicle’s final position. Simulation results show that the performance of the proposed algorithm is better than the classic Chan algorithm and 2-step algorithm based on averaging method. The performance of the proposed algorithm can meet the requirement of positioning service in ITS.
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Received: 01 December 2009
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Corresponding Authors:
Zhao Tai-yang
E-mail: taiyang@dlut.edu.cn
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2010, Vol. 32 
