Calibration and Measurement of Signal Strength for Sensor Localization

Calibration and Measurement of Signal Strength for Sensor Localization

Neal Patwari (University of Utah, USA) and Piyush Agrawal (University of Utah, USA)
DOI: 10.4018/978-1-60566-396-8.ch005
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Abstract

A number of practical issues are involved in the use of measured received signal strength (RSS) for purposes of localization. This chapter focuses on device effects and modeling problems which are not well covered in the literature, such as transceiver device manufacturing variations, battery effects on transmit power, nonlinearities in RSSI circuits, and path loss model parameter estimation. The authors discuss both the negative impacts of these effects and inaccuracies, and adaptations used by particular localization algorithms to be robust to them, without discussing any algorithm in detail. The authors present measurement methodologies to characterize these effects for wireless sensor nodes, and report the results from several calibration experiments to quantify each discussed effect and modeling issue.

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