Abstract
The indoor information of location has been used widely and it’s of great significance in our society and daily life. Most indoor positioning methods are based on Bluetooth, RFID, ZigBee and other technologies. In some scenarios, especially in the harsh industrial manufacturing environment, these technologies mainly based on CSMA are often inadequate to meet the needs in large capacity, low power consumption and anti-interference. We propose an indoor location system based on wireless sensor network to reduce the limitation. It adopts TDMA as channel access mechanism to ensure the efficiency and instantaneity of the indoor location system. A reference node working in both 2.4GHz and 780MHz is designed to combine penetrability and energy conservation. We improve the positioning algorithm based on RSSI by using the K-means algorithm. The experiment shows that the indoor positioning system basically satisfies the demand in reliability and positioning accuracy.
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