LOSNUS: Ultrasonic indoor locating for numerous static and mobile devices

Spitzer, Gerhard F.; Schweinzer, Herbert

doi:10.1109/wpnc.2010.5649085

Cited by 1 publication

(2 citation statements)

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“…Transmitting delays are chosen such that LOS signals of consecutive transmitters do not overlap at the receivers. In case of over-lapping of LOS and NLOS signals, perfect decoding of the larger LOS signal is common [19]. Binary cross-correlation [20,21] of the received frame with the reference signal delivers high resolution ToA measurements.…”

Section: Basic Principle Of Losnusmentioning

confidence: 99%

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

Walter

Syafrudin

Schweinzer

2013

IJGI

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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.

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Section: Basic Principle Of Losnusmentioning

confidence: 99%

“…(18) According to F.7a is calculated as (19) In this case the meaning of is the mean systematic correction factor. The variance associated with can be calculated similar to F.7b as (20) The mean variance of the correction incorporates the uncertainty of the calibration and the uncertainty of the evaluation of .…”

Section: Computation Of Uncertainty Parametersmentioning

confidence: 99%