Dynamic self-adaptation positioning method of underwater wireless sensor network

Abstract

The invention discloses a dynamic self-adaptation positioning method of an underwater wireless sensor network, and belongs to the technical field of positioning of the underwater wireless sensor network. The dynamic self-adaptation positioning method of the underwater wireless sensor network comprises the following steps that firstly, an anchor node evaluates the accuracy of the coordinates of the self-statement position; secondly, a node to be positioned builds a dynamic updatable positioning set; thirdly, the positioning set carries out multi-hop distance estimation with the deviation corrected in a self-adaptation mode; fourthly, the position accommodation space of the node to be positioned is solved; fifthly, coordinate estimation and accuracy evaluation of the node to be positioned are carried out. The accuracy of the coordinates of the statement position of the anchor node is evaluated and calibrated on line, the adverse influence on positioning performance from the position error of the anchor node is reduced, the accuracy of multi-hop distance estimation is improved through multi-hop distance estimation with the deviation corrected in the self-adaptation mode, the on-line cognition and dynamic self-adaptation capacity of a complex positioning environment of a sensor network node are improved, ad the positioning performance of the underwater wireless sensor network is improved.

Description

technical field [0001] The invention belongs to the technical field of underwater wireless sensor network positioning, in particular to self-positioning of underwater wireless sensor network nodes for applications in complex ocean environments, and specifically relates to a dynamic self-adaptive positioning method for underwater wireless sensor networks. Background technique [0002] Underwater Wireless Sensor Networks (Underwater Wireless Sensor Networks) is a revolution in the field of marine information perception and application. Large-scale random deployment in complex marine environments to perform tasks such as information perception, collection, processing and transmission is a typical application, such as Sea battlefield situation awareness, marine environment monitoring, underwater target positioning and tracking, etc. Node self-localization is a key supporting technology for underwater sensor networks and a prerequisite for such applications, because the perceived...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a dynamic self-adaptive positioning method for underwater wireless sensor networks, which solves the problem of self-positioning of underwater wireless sensor network nodes under the influence of multi-source unknown noise and the existence of anchor node position errors and multi-hop distance estimation deviations. ; Under the condition of small sample size, through the online evaluation and calibration of the accuracy of the anchor node's declared position coordinates, the impact of the anchor node position error on the positioning performance is reduced, and the multi-hop distance estimation of the deviation adaptive correction is used to reduce the node multi-hop distance Estimate the impact of deviation on positioning performance, enhance the online cognition and dynamic adaptive ability of nodes in complex positioning environments, and improve the positioning performance of underwater wireless sensor networks

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