Access Point topology evaluation and optimization based on Cramér-Rao Lower Bound for WLAN indoor positioning

Authors:

1 June 2016

conference paper
Published by Institute of Electrical and Electronics Engineers (IEEE)

p. 1-5
DOI:10.1109/icl-gnss.2016.7533850

Abstract

WLAN Access Point network is typically optimized for communication scope, and not for localization. It is thus important to understand the positioning accuracy limits under a certain given Access Point topology and to be able to make design recommendations if the Access Point topology can be adapted better for the navigation needs. This paper calculates a Cramér-Rao Lower Bound -based criterion for Received Signal Strength -based positioning. Two study cases are presented about how the proposed criterion can be used to choose the optimal Access Point density and the optimal Access Point topology in a network designed for positioning purposes. In addition, our Cramér-Rao Lower Bound-based criterion can also be used to estimate the expected accuracy bound in an existing network, based on its underlying Access Point density or topology. Measurement-based results are used to verify our proposed approach.

Keywords

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