Wireless sensor network node positioning method under composite noise condition

Abstract

The invention relates to a wireless sensor network node positioning method under a composite noise condition, which belongs to the field of wireless network technologies and solves a problem that theexisting wireless sensor network node positioning relies too much on the distance information between nodes and cannot achieve accurate positioning under the composite noise condition. The method comprises the steps of selecting part of anchor nodes and part of unknown nodes, acquiring relative distance information between any selected anchor node and any selected unknown node and between the selected anchor nodes, constructing a square Euclidean distance matrix under the composite noise condition, taking the square Euclidean distance matrix as an observation matrix, taking the composite noseas a noise matrix and taking the accurate square Euclidean distance matrix between the nodes as a target matrix, solving the target matrix according to the relationship that the superimposition of thetarget matrix and the noise matrix equals to the observation matrix; and acquiring actual location information of each unknown node according to the target matrix. The wireless sensor network node positioning method realizes accurate positioning for the network nodes under the composite noise condition by using less node information.

Description

technical field [0001] The invention relates to the technical field of wireless networks, in particular to a wireless sensor network node positioning method under complex noise conditions. Background technique [0002] In wireless sensor networks, the acquisition of node's own location information is very important for various applications. Positioning is one of the most basic wireless sensor network technologies to obtain accurate node location information, which is the premise of most wireless sensor network applications. Limited by node energy, deployment conditions, and economic factors, in general wireless sensor networks, only a few anchor nodes obtain their own positions by loading GPS, etc., and the position information of other unknown nodes is calculated by positioning algorithms. [0003] The existing localization algorithms for wireless sensor networks can be divided into two categories: distance-based localization algorithms and distance-free localization algor...

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Problems solved by technology

[0005] In view of the above analysis, the present invention aims to provide a wireless sensor network node positioning method under complex noise conditions to solve the problem that the existing wireless sensor network node positioning methods need to rely too much on the distance information between nodes, which cannot be achieved under complex noise conditions. Achieving accurate wireless sensor network node localization

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