A T-DMB navigation system for seamless positioning in both indoor and outdoor environments

作者：Moon Gong Bo; Chun Se Bum; Hur Moon Beom; Jee Gyu In^*

来源：EURASIP Journal on Advances in Signal Processing, 2014, 2014(1): 99.

DOI：10.1186/1687-6180-2014-99

• T-DMB positioning
• TDOA
• Indoor positioning
• Seamless positioning
• Phase reference symbol

The conventional global positioning system (GPS) can often fail to provide position determination for a mobile user in indoor and urban environments. To cope with GPS failure in such environments, a new navigation system which utilizes a terrestrial digital multimedia broadcasting (T-DMB) signal to obtain the mobile user%26apos;s position is presented. Since the T-DMB transmitters in Korea construct a single frequency network (SFN), which forces the transmitters to be synchronized, the mobile user can measure a time difference of arrival (TDOA) for all audible T-DMB transmitter pairs. The time difference between T-DMB transmitters is converted to a distance difference by multiplying the time difference by the speed of light. Using these measurements and a TDOA positioning method, the mobile user position can be estimated. An experiment with a T-DMB receiver and a data acquisition (DAQ) board is performed in Seoul to analyze the error characteristic of TDOA measurements. It is certified that the measurement error is bounded under 300 m and can be used to determine the mobile user%26apos;s position with a small standard deviation.

• 出版日期2014-7-3