Indoor Positioning System based on ZigBee

• Main Authors: Sung-Chih Su, 蘇嵩智
• Other Authors: Kao-Shing Hwang
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/23484764862639735461

碩士 === 國立中正大學 === 電機工程所 === 95 === This thesis describes a positioning system based on IEEE802.15.4/ZigBee, which can obtain user’s position at an indoor environment. In IEEE 802.15.4, the Received Signal Strength Indicator (RSSI) is used to determine the quality of the communication between nodes. We use the RSSI value to build the signal database. There is a model to map the RSSI to real position by a Neural Network. When a user wants to know where he is. The only thing needs to do is to put the RSSI value to the system, and obtain the position. We propose an error correction algorithm to reduce the error distance because the accuracy is not good enough. The error distance of the result will become high when the user is moving such that we implement a Kalman filter to correct the error in movement.