Joint Semi-supervised RSS Dimensionality Reduction and Fingerprint Based Algorithm for Indoor Localization

TL;DR

This paper introduces a semi-supervised dimensionality reduction technique combined with a fingerprint-based algorithm to enhance indoor localization accuracy using WLAN RSS data, addressing high-dimensional challenges and AP variability.

Contribution

It proposes a novel semi-supervised RSS dimensionality reduction method and integrates it with a fingerprint algorithm to improve indoor localization performance.

Findings

Reduces dimensionality effectively in WLAN RSS data.

Improves localization accuracy in indoor environments.

Addresses curse of dimensionality and AP variability issues.

Abstract

With the recent development in mobile computing devices and as the ubiquitous deployment of access points(APs) of Wireless Local Area Networks(WLANs), WLAN based indoor localization systems(WILSs) are of mounting concentration and are becoming more and more prevalent for they do not require additional infrastructure. As to the localization methods in WILSs, for the approaches used to localization in satellite based global position systems are difficult to achieve in indoor environments, fingerprint based localization algorithms(FLAs) are predominant in the RSS based schemes. However, the performance of FLAs has close relationship with the number of APs and the number of reference points(RPs) in WILSs, especially as the redundant deployment of APs and RPs in the system. There are two fatal problems, curse of dimensionality (CoD) and asymmetric matching(AM), caused by increasing number of APs and breaking down APs during online stage. In this paper, a semi-supervised RSS dimensionality reduction algorithm is proposed to solve these two dilemmas at the same time and there are numerous analyses about the theoretical realization of the proposed method. Another significant innovation of this paper is jointing the fingerprint based algorithm with CM-SDE algorithm to improve the localization accuracy of indoor localization.