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ISPRS Int. J. Geo-Inf. 2013, 2(4), 908-934; doi:10.3390/ijgi2040908

A Self-Contained and Self-Checking LPS with High Accuracy

1,* , 1,2
1 Institute of Electrodynamics, Microwave and Circuit Engineering, Vienna University of Technology, Gußhausstrasse 25/354, Vienna 1040, Austria 2 Electronics Engineering Polytechnic Institute of Surabaya, Jl. Raya ITS-Kampus ITS Sukolilo, Surabaya 60111, Indonesia
* Author to whom correspondence should be addressed.
Received: 28 July 2013 / Revised: 16 September 2013 / Accepted: 17 September 2013 / Published: 27 September 2013
(This article belongs to the Special Issue Indoor Positioning and Indoor Navigation)
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There are many situations in which it is desirable to use a Local Positioning System (LPS), which constitutes a complete and independent unit, offers high accuracy and in addition is economical to realize. This paper describes the LPS LOSNUS (Localization of Sensor Nodes by Ultra Sound). LOSNUS is a complete and independent LPS where the same system can be used for localization and calibration. Primarily designed for locating numerous quasi-static devices, special care of system construction has taken on costly factors, especially in the construction of the infrastructure and of sensor nodes where locating can be realized with minimal additional hardware costs. LOSNUS enables a calibration process without the need of additional expensive tools and/or laborious time in order to get accurate positions of transmitters. As a result, LOSNUS delivers high locating accuracy at medium update rates, and in case of sufficient number of transmitters can also tolerate single failures in the Time of Arrival (ToA) measurement, allowing arbitrary failure modes. In this article, the system is presented starting from design, realization and algorithms of localization and calibration. Finally, new measurement results are showing the high accuracy of localization based on a discussion of the applied uncertainty description.
Keywords: 3D localization; ToA; TDoA; calibration; LPS 3D localization; ToA; TDoA; calibration; LPS
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Walter, C.; Syafrudin, M.; Schweinzer, H. A Self-Contained and Self-Checking LPS with High Accuracy. ISPRS Int. J. Geo-Inf. 2013, 2, 908-934.

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ISPRS Int. J. Geo-Inf. EISSN 2220-9964 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert