Research On Node Location Technology Based On Non-Ranging

Nowadays,wireless sensor network node location technology has been widely used by researchers in medical,military,industrial,environmental protection and other fields.Compared with other sensor network technologies,the most important function of wireless sensor network node location technology is the positioning function of network nodes.Through combining self-positioning with the information acquired by itself,it can create more practical value.Therefore,as the supporting technology for WSN from theory to reference,wireless sensor network node location technology has become a hot research topic at home and abroad.The author firstly summarized the principle of wireless sensor node location technology,expounded several classical positioning technologies,and through analyzing the characteristics of different technology methods in detail,summarized their advantages and disadvantages.In order to explore the essential reasons that cause to positioning errors in this process,the positioning process of the DV-Hop algorithm in various algorithms was deeply analyzed.After that,the author analyzed the objective reasons that affected the acc uracy of DV-hop algorithm,added the judgment of signal attenuation,and pro posed an improved SLJDV-hop algorithm.In addition,on this basis,investigat ing its subjective influencing factors,the author explored several corresponding improvement methods,which makes it have a certain degree of improvement compared with the traditional MIDV-Hop performance.Finally,the author analyzed the DV-hop algorithm and its improved algorithm by MATLAB.The results show that compared with the original DV-hop algorithm,the improved SLJDV-hop algorithm and MIDV-Hop positioning algorithm both have better performance.In the simulation experiment and analysis section,the method of controlling variables was adopted by changing the two variables of the number of known points and the coverage of communication respectively.Then the author analyzed the two results separately and found that compared with the DV-hop algorithm,both positioning algorithms improve the accuracy of positioning,especially the MIDV-hop positioning algorithm,which has a higher positioning accuracy.