Font Size: a A A

Research On Localization Algorithm Of Wireless Sensor Networks Based On Taylor Series

Posted on:2018-12-19Degree:MasterType:Thesis
Country:ChinaCandidate:J X ChenFull Text:PDF
GTID:2348330515983275Subject:Electronic and communications engineering
Abstract/Summary:PDF Full Text Request
With the rapid development of technology in today's society,human beings have gradually entered the high-speed information era.The development of wireless sensor networks arises at the historic moment.It has been developed from the initial stage of function simplification to the miniaturization,component integration and function networking in the mature stage,which will facilitate all aspects of people's future life.Wireless sensor network contains many kinds of technologies,mainly including sensors,electronic technology,distributed processing and communication,and by a large number of sensor nodes in its simple application of the polymerization,it is a self-organizing network system,in the face of new data acquisition and processing information.The technology of node localization arises at the same time.It estimates the absolute coordinates of unknown nodes according to the anchor nodes and a kind of calculation algorithm which is known by the coordinate information of a few positions.At present,the needs of various application scenarios have enabled localization technology to become an important supporting technology of the network.Based on the location of network nodes and the advantages of the Taylor series expansion algorithm,this paper makes a detailed study of various algorithms related to the location of nodes.The main components are as follows:First of all,the background and significance of this paper are given,and the research status of this research topic is reviewed.The technology and application of wireless sensor networks are analyzed.Secondly,lots of relevant documents and records,systematic introduction and research related with node positioning technology and several typical algorithms,localization algorithm and several different simulation analysis and comparison of their advantages and disadvantages and application situation,and finally summarizes the simulation accuracy of various positioning algorithm.Then,the application of Taylor series expansion algorithm in location is introduced.It can be used for convergence iteration of reasonable initial value,and the algorithm is more accurate.The measurement error obtained from RSSI range measurement increases with the measured distance,and the correction matrix of Taylor series is improved,so that the influence of different distances on coordinate offset is different.The error of RSSI range measurement has a great influence on the calculation results of the algorithm.Therefore,an algorithm including Gauss filtering is introduced to optimize the RSSI measurement value.Finally,a measurement of the distance is based on improved weight algorithm for each anchor node to reflect the influence of anchor nodes to unknown nodes,location of final results is very close to the true value,very good to improve the positioning accuracy.Finally,the performance of the improved algorithms mentioned in this paper is simulated by MATLAB,and the performance indexes of the algorithms are compared.The reliability and effectiveness of the algorithms studied in this paper are highlighted.The conclusion summarizes and looks forward to the full text.
Keywords/Search Tags:Wireless sensor networks, node localization algorithm, Taylor series, RSSI
PDF Full Text Request
Related items