Precision Wireless Positioning Scheme in Small Range Based on First-Order Difference and Correlation Inspection

Precision Wireless Positioning Scheme in Small Range Based on First-Order Difference and Correlation Inspection

Zhengping Li, Ziren Wang, Yongmei Zhang, Li Ma
Copyright: © 2013 |Pages: 15
DOI: 10.4018/jitr.2013070101
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Abstract

This paper made analysis of present situation and development trend of the positioning in small range at first and then made summary about the technologies and algorithms of the positioning in small range. According to the above content, wireless location technology has broad application prospects, especially the applications related to the location in small range. This new wireless positioning scheme mainly aims at improving the positioning method based on time difference of arrival (TDOA) in small range. This paper designs an improved positioning system which uses matched filter to calculate TDOA value. Then the system estimated the position of signal source by Chan's algorithm and used the first-order difference method to optimize the positioning results. From the simulation results by Matlab, it can be seen that this improved positioning system has improved the positioning accuracy and met the demand of the high precision positioning.
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With the development of communicating technology and intelligent transportation technology, the service based on location has rapidly developed. Wireless location technology, as the basic technology of this service, has important research value. With the development of technology and the increasing demand of positioning, wireless location technology has made great progress (Tekinary, Chao, & Richton, 1998). In recent years, wide application of infinite positioning technology mainly includes received signal strength indication (RSSI) localization method, time of arrival (TOA) or time difference of arrival (TDOA) localization method, angle of arrival (AOA) localization method and all kinds of hybrid localization methods (Kegen Yu & Y. Jay Guo, 2009).

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