J4 ›› 2010, Vol. 37 ›› Issue (1): 163-168.doi: 10.3969/j.issn.1001-2400.2010.01.029

• Original Articles • Previous Articles     Next Articles

UWB location system based on direct-recording time difference

HUANG Dong-yan;LIN Ji-ming;WANG Bo   

  1. (School of Information and Communication, Guilin Univ. of Electronic Tech., Guilin  541004, China)
  • Received:2008-10-05 Online:2010-02-20 Published:2010-03-29
  • Contact: HUANG Dong-yan E-mail:huangdongyan-gua@163.com

Abstract:

An approach to the construction of the tag location system based on the Ultra-Wideband signal is presented. The proposed scheme does not require strict synchronization among the base stations since it introduces an independent counter to record the time differences of arrival (TDOA). The proposed scheme can avoid the error caused by the asynchronous reference time and improve the location accuracy. Error analysis and simulation results are given. The simulation results show that in the proposed IEEE 802.15.4a channel the system succeeds in achieving a higher position accuracy than the traditional TDOA scheme with a reference time error. Therefore, the proposed scheme can be considered as a competitive candidate for low cost, low power consumption and low complexity indoor UWB location application scenarios.

Key words: ultra wideband, location, time difference of arrival, synchronization