MATEC Web Conf.
Volume 207, 2018International Conference on Metal Material Processes and Manufacturing (ICMMPM 2018)
|Number of page(s)||5|
|Section||Material Science Engineering|
|Published online||18 September 2018|
A New Method of D-TDOA Time Measurement Based on RTT
Department of Info Sci.& Tech., Wenhua College, Wuhan, China
* Corresponding author e-mail: email@example.com
In this paper, a novel difference-time difference of arrival (D-TDOA) time measurement method based on round-trip transmission (RTT) is proposed. The accuracy of time measurement is critical for high accuracy positioning, yet the traditional time difference of arrival (TDOA) time measurement method cannot deal well with the problem of time synchronization error, such as the initial time offset and transmission cumulate time error caused by clock frequency offset and drift. We formulate a D-TDOA time measurement mechanism to overcome the shortcoming of the traditional TDOA method in eliminating the influence of clock error. It is proved that the D-TDOA method can effectively eliminate the influence of initial time offset by analyzing the simulation data, which can also reduce the cumulate time error remarkably. The simulation results demonstrate that the D-TDOA method can significantly enhance the accuracy of time measurement in the circumstance that the AP clock synchronization is not required seriously.
© The Authors, published by EDP Sciences, 2018
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