Research Of Location Technique For Wireless Sensor Networks Based On ZigBee

With the development of communication and Internet technology,the application of positioning technology is more and more extensive,location information is becoming increasingly important in all fields.Among the existing positioning technologies,outdoor positioning technology has been developed and widely used,including Global Positioning System,Cellular wireless location,etc.But there is still space for the development of indoor positioning technology.The indoor environment is complex,there are many obstacles,there are multipath,reflection,diffraction and so on,which brings great difficulty to indoor positioning.As an emerging Wireless Sensor Network(WSN)technology,Zig Bee has the characteristics of low cost,easy deployment,mature technology and so on.These characteristics have become Zig Bee's development advantages in the field of indoor positioning.This paper first introduces the current mainstream positioning solutions,after studying and analyzing various positioning technologies,Zig Bee is selected as the basic platform to realize indoor positioning solutions based on the consideration of comprehensive conditions.In the positioning stage,the positioning algorithm is improved by combining the idea of difference correction and weighted least square method.It is verified that the improved algorithm is superior to the traditional LLS algorithm in positioning accuracy and anti-noise ability in the simulation verification.Finally,according to the research results,a Zig Bee-based positioning system is designed.The sensor network composed of Zig Bee nodes in the system realizes the positioning function,which is divided into two parts: the positioning network and the upper computer.In terms of hardware,CC2530 is mainly used as the beacon node and the unknown node.The unknown node collects information and sends it to thecoordinator,who transmits the data to the upper computer,and then calculates the specific location by the upper computer to achieve indoor positioning effect.In this paper,the ranging process,the positioning process and the realization principle of the positioning solution are comprehensively expounded,and the components of the positioning system are described in detail.