Localization algorithm of indoor Wi-Fi access points based on signal strength relative relationship and region division

Document Type

Article

Publication Date

1-1-2018

Abstract

Precise localization techniques for indoor Wi-Fi access points (APs) have important application in the security inspection. However, due to the interference of environment factors such as multipath propagation and NLOS (Non-Line-of-Sight), the existing methods for localization indoor Wi-Fi access points based on RSS ranging tend to have lower accuracy as the RSS (Received Signal Strength) is difficult to accurately measure. Therefore, the localization algorithm of indoor Wi-Fi access points based on the signal strength relative relationship and region division is proposed in this paper. The algorithm hierarchically divide the room where the target Wi-Fi AP is located, on the region division line, a modified signal collection device is used to measure RSS in two directions of each reference point. All RSS values are compared and the region where the RSS value has the relative largest signal strength is located as next candidate region. The location coordinate of the target Wi-Fi AP is obtained when the localization region of the target Wi-Fi AP is successively approximated until the candidate region is smaller than the accuracy threshold. There are 360 experiments carried out in this paper with 8 types of Wi-Fi APs including fixed APs and portable APs. The experimental results show that the average localization error of the proposed localization algorithm is 0.30 meters, and the minimum localization error is 0.16 meters, which is significantly higher than the localization accuracy of the existing typical indoor Wi-Fi access point localization methods.

Identifier

85047502211 (Scopus)

Publication Title

Computers Materials and Continua

External Full Text Location

https://doi.org/10.3970/cmc.2018.055.071

e-ISSN

15462226

ISSN

15462218

First Page

71

Last Page

93

Issue

1

Volume

55

Grant

162102210032

Fund Ref

National Natural Science Foundation of China

This document is currently not available here.

Share

COinS