Title :
Reducing Calibration Effort for WLAN Location and Tracking System using Segment Technique
Author :
Tsai, Tzu-Chieh ; Cheng-Lin Li ; Lin, Tsung-Ming
Author_Institution :
Dept. of Comput. Sci., Nat. Cheng Chi Univ., Taipei
Abstract :
As mobile computing technology becomes more and more mature, people feel great interest on context-aware applications and services. Referring to context, location-aware system is one of the most important components. This paper presents a precise indoor RF-based (IEEE 802.11) locating system named precise indoor locating system (PILS). In order to acquire high level of location estimation result, a large number of training samples should be collected in offline phase. As a result, the system becomes impractical and huge number of man-power is needed. In this paper, we aim to reduce the manual effort in constructing radio map and maintain high accuracy in our system. We propose models for data calibration, interpolating, location estimation, and tracking in PILS. Wireless Channel Propagation model is also in our concern. Large scale and small scale fading are involved in the wireless channel propagation
Keywords :
calibration; fading channels; indoor radio; mobile computing; mobility management (mobile radio); wireless LAN; wireless channels; RF-based PILS; WLAN location; calibration effort reduction; context-aware application; fading channel; interpolation; location-aware system; mobile computing technology; precise indoor locating system; radio map construction; segment technique; tracking system; wireless channel propagation model; Application software; Calibration; Computer applications; Computer networks; Fading; Large-scale systems; Mobile computing; Phase estimation; Receivers; Wireless LAN;
Conference_Titel :
Sensor Networks, Ubiquitous, and Trustworthy Computing, 2006. IEEE International Conference on
Conference_Location :
Taichung
Print_ISBN :
0-7695-2553-9
DOI :
10.1109/SUTC.2006.116
