An investigation into the accuracy of the kriging method for multiple Wi-Fi access point RSSI estimation

Abstract

Kriging was originally developed for geographical interpolation purposes, but has proven to be a powerful tool in many other applications as well. In this study we evaluate the accuracy of kriging for Wi-Fi signal strength estimation in a complex indoor environment using multiple Wi-Fi Access Points. The empirical investigation of several scenarios is described and the results analysed. Kriging is shown to be a valid method for multiple access point Wi-Fi signal strength estimation and provides a 84% to 88% level of accuracy. Some further comments are made on the practical use of kriging for Wi-Fi signal strength estimation