WLAN 기반 실내 위치 측위에서 측위 정확도 향상을 위한 데이터 구축 방법

Title
WLAN 기반 실내 위치 측위에서 측위 정확도 향상을 위한 데이터 구축 방법
Other Titles
Database Investigation Algorithm for High-Accuracy based Indoor Positioning
Author(s)
박용완허수정[허수정]송진우[송진우]유국열
Keywords
WLAN; LBS; Fingerprint; RSSI; Dynamic range; Location; Weighting average
Issue Date
201204
Publisher
대한임베디드공학회
Citation
대한임베디드공학회논문지, v.7, no.2, pp.85 - 93
Abstract
In this paper, we proposed Wireless LAN (WLAN) localization method that enhances database construction based on weighting factor and analyse the characteristic of the WLAN received signals. The weighting factor plays a key role as it determines the importance of Received Signal Strength Indication (RSSI) value from number of received signals (frequency). The fingerprint method is the most widely used method in WLAN-based positioning methods because it has high location accuracy compare to other indoor positioning methods. The fingerprint method has different location accuracies which depend on training phase and positioning phase. In training phase, intensity of RSSI is measured under the various. Conventional systems adapt average of RSSI samples in a database construction, which is not quite accurate due to variety of RSSI samples. In this paper, we analyse WLAN RSSI characteristic from anechoic chamber test, and analyze the causes of various distributions of RSSI and its influence on location accuracy in indoor environments. In addition, we proposed enhanced weighting factor algorithm for accurate database construction and compare location accuracy of proposed algorithm with conventional algorithm by computer simulations and tests.
URI
http://hdl.handle.net/YU.REPOSITORY/28415
ISSN
1975-5066
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공과대학 > 모바일정보통신공학과 > Articles
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