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Method for three-dimensionally positioning network node of wireless sensor

A wireless sensor and three-dimensional positioning technology, applied in positioning, network topology, wireless communication, etc., can solve problems such as difficult to effectively suppress the influence of node positioning accuracy, and achieve the effect of improving the accuracy of three-dimensional positioning and suppressing the impact

Inactive Publication Date: 2009-10-21
长讯通信服务有限公司
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Problems solved by technology

[0009] In summary, the above methods are difficult to effectively suppress the impact of ranging noise between nodes and anchor nodes on node positioning accuracy

Method used

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  • Method for three-dimensionally positioning network node of wireless sensor
  • Method for three-dimensionally positioning network node of wireless sensor
  • Method for three-dimensionally positioning network node of wireless sensor

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Embodiment Construction

[0022] In order to make the purpose, technical solutions and advantages of the present invention clearer, the implementation of the present invention will be further described in detail below in conjunction with the accompanying drawings:

[0023] This embodiment provides a method for three-dimensional positioning of wireless sensor network nodes. The method uses a least squares support vector regression machine to estimate three-dimensional position coordinates of unknown nodes.

[0024] see figure 1 , the method includes the following steps:

[0025] Step 101 grids the spatial network area, calculates the straight-line distances from grid vertices to each anchor node and forms a distance vector.

[0026] Step 102 forms three sets of training samples according to the grid vertex distance vector and the grid vertex three-dimensional coordinates.

[0027] Step 103 learns the training samples through the radial basis kernel function and the least squares support vector regress...

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Abstract

The invention discloses a method for three-dimensionally positioning a network node of a wireless sensor, which comprises the following steps: performing meshing on a space network region, calculating the distance between a mesh vertex and each anchor node and forming distance vectors; forming three groups of training sample sets according to the mesh vertex distance vectors and mesh vertex three-dimensional coordinates; obtaining a support vector regression machine for estimating an X coordinate, a Y coordinate and a Z coordinate of an unknown node respectively according to radial basis kernel function and a study training sample of a least squares support vector regression machine; and forming distance vectors by measuring distances between the unknown node and each anchor node, and respectively inputting the distance vectors into three regression machines to obtain a three-dimensional coordinate estimation value of the unknown node. Through the method, the influence on the node positioning accuracy by distance measuring noises of the unknown node and the anchor nodes can be greatly inhibited, and the three-dimensional positioning accuracy of the nodes is obviously improved.

Description

technical field [0001] The invention relates to a three-dimensional positioning method for a wireless sensor network node, in particular to a three-dimensional positioning method for a wireless sensor network node based on a least square support vector regression machine. Background technique [0002] Wireless sensor network is a new generation of sensor network, which has a very broad application prospect. Node localization is an important basis for the application of wireless sensor networks, and it requires the node localization method to have good noise tolerance and accuracy. The traditional node positioning technology includes ranging-based and non-ranging-based positioning technology. The ranging-based positioning technology measures the distance or signal arrival angle from an unknown node to a neighbor node. The distance (angle) measurement value usually contains a large error. Through The unknown node positioning results calculated by the least squares method and ...

Claims

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Application Information

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IPC IPC(8): G01S5/14H04W84/18
Inventor 吴奕凯彭再国
Owner 长讯通信服务有限公司
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