Construction of the Radio Map with Defective GPS Position Information

TL;DR

This paper addresses the challenge of constructing accurate radio maps for indoor positioning when GPS data is defective or unavailable, proposing methods to improve radio map accuracy despite survey disruptions.

Contribution

It introduces new techniques for constructing radio maps that are robust to defective GPS data and survey errors, enhancing indoor positioning accuracy.

Findings

Proposed methods improve radio map accuracy in the presence of GPS defects.

Analysis of survey incidents helps identify sources of radio map errors.

Enhanced radio map construction leads to better indoor positioning performance.

Abstract

The basic idea of RSS-based indoor positioning is to estimate the receiver location by matching the measured received signal strength indicator (RSSI) with preestablished RSSI collections with corresponding locations, known as the radio map. Hence, constructing an accurate radio map directly relates to accurate positioning performance in RSS-based indoor positioning. RSS-based indoor positioning can be easily conducted with a radio map that surveys every location, but a complete radio map cannot be constructed when the map area includes locations that are physically impossible to reach or denied access. In addition, measurement errors or device problems can occur during the survey, resulting in degradation of the radio map. We analyzed incidents that occurred in actual RSSI surveys that could disrupt the construction of the radio map and proposed methods to construct a more accurate radio map.