Design And Implemetation Of Zigbee-based Localization System

Wireless sensor networks becomes a new data collection technology of autonomous sensor nodes. It allows communications in moving state, so that the user can at any time, any place to get to your desired information.At first we build a hardware architecture of ZigBee-based wireless positioning system. We offer an low power application platform by using MPS430 processor and CC2520 devices. The article analyses the ZigBee network communication mechanism under the hardware architecture. Analysis the structure of ZigBee wireless protocol stack. Then research on the specific function of each layer and the communication model between two layers.The research on localization algorithm in the actual applications has been very hot. In this situation, a number of excellent localization algorithm appeared according to various factors , such as the cost , power and applications areas. As we know, the anchor-based mass algorithm has higher precision while the anchor-free ABC algorithm has lower cost. In order to take advantages of them, a new localization algorithm is presented. It not only controls the precision within endure ranges of ABC algorithm, but also reduces the number of anchors of the mass algorithm . So it can meet the needs of the actual applications. The attentions of the new localization algorithm is indicated.The specific design of the system is given. Implementation of Zigbee-based localization system based on the improved algorithm. Gives the flow diagram of main program and improved algorithm. In the test portion, compare the improved algorithm with other localization algorithms. Then we concluded that the improved algorithm can meet the cost and precision requirements of wireless network localization in industrial applications.