Research On Combined Positioning System And Method Of Wireless Sensor Network

Wireless sensor network belongs to a kind of distributed sensor network.As a new generation of information collection technology,it has a wide range of application scenarios.Nowadays,it has played significant role in military,medical and other fields.Node location is an important research field in wireless sensor network,whose accuracy has great impact on the performance and practicality of wireless sensor network.At present,positioning algorithms are mainly divided into positioning algorithm based on ranging and positioning algorithms without ranging.This paper has carried out related research on positioning algorithm based on ranging.On the basis of some existing positioning algorithms,an improved RSSI-based positioning algorithm and an RSSI-based ground-air integrated positioning algorithm are proposed.In addition,through the method of experimental simulation,it is verified that the proposed algorithm has greatly promoted in anti-jamming and positioning accuracy.The main work and innovation in this paper are as follows:1.An improved positioning algorithm based on RSSI is proposed,which combines the methods of trilateral positioning and centroid positioning,as well as improving the algorithm during the ranging process and the final positioning.The methods of ranging correction and weighting coefficient positioning are put forward which greatly improve the positioning accuracy.2.An integrated ground-air positioning algorithm based on RSSI is proposed,which expands the positioning algorithm to three-dimensional space by setting air beacon nodes,as well as adding vertical coordinates to the calculation process which further improve the positioning accuracy.3.In response to current COVID-19 epidemic,a design method of infectious source location and alarm system is designed based on node positioning technology.