Non-ranging positioning method based on modified simulation curve fitting

Abstract

The invention relates to a non-ranging positioning algorithm based on corrected simulation curve fitting, and is characterized in that equipment required by the algorithm and implementation steps are as follows: the required equipment is a wireless sensor node group. The wireless sensor node group includes 400 wireless sensor nodes, wherein positions of 80 wireless sensor nodes are known, the 80 wireless sensor nodes are called anchor nodes, and are represented by Node_A(i), i=1,2,...,80, and (Xi, Yi) represents x axis and y axis coordinates of Node_A(i) in a rectangular plane coordinate system; and positions of 320 wireless sensor nodes are unknown, the 320 wireless sensor nodes are called unknown nodes and are represented by Node_U(j), j=1,2,...,320, and (Xj, Yj) represents x axis and y axis coordinates of Node_U(j) in the rectangular plane coordinate system. The non-ranging positioning algorithm based on corrected simulation curve fitting solves the problem of low positioning accuracy in complex environment, and by modification of hop section distance and anchor node selection of an original algorithm, a distance error is reduced, and positioning accuracy is improved.

Description

technical field [0001] The invention relates to a non-ranging positioning method based on modified simulation curve fitting, and belongs to the technical field of wireless sensor networks. Background technique [0002] Positioning technology, as one of the key technologies in wireless sensor networks, deploys nodes by random seeding in complex environments and where nodes cannot be deployed manually. Therefore, positioning technology becomes an indispensable part. The positioning technology based on non-ranging is currently a commonly used method in domestic and foreign applications, and the DV-Hop method is the most widely used non-ranging positioning technology, which solves the problems of high error and high overhead. In a wireless sensor network with a large scale and a large amount of communication, it is a very good positioning solution. [0003] At present, there are more and more researches and improvements based on DV-Hop methods at home and abroad. When DV-Hop ca...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a non-ranging positioning method based on modified simulation curve fitting, which improves the problem of low positioning accuracy in complex environments, by modifying the jump distance and anchor node selection of the original method , so as to reduce the distance error and improve the positioning accuracy

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