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Location method of wireless sensor network based on rss

A wireless sensor, network positioning technology, applied in positioning, wireless communication, radio wave measurement system and other directions, can solve the problem of large positioning error, achieve the effect of improving real-time performance, reducing positioning accuracy and increasing the interference, and expanding the application field

Active Publication Date: 2018-02-02
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
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Problems solved by technology

However, under noise interference, the positioning error is still relatively large

Method used

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  • Location method of wireless sensor network based on rss
  • Location method of wireless sensor network based on rss
  • Location method of wireless sensor network based on rss

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Embodiment Construction

[0031] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0032] Multilateral measurement methods such as figure 1 shown.

[0033] Such as figure 2 Shown, flow process of the present invention is as follows:

[0034] Compressed sensing-coarse positioning stage: coarse positioning uses compressed sensing technology. Set M to be the number of sensors, N to be the number of grids, and K to be the sparseness.

[0035] First use the transformation space to describe the signal, and then directly collect a small number of linear observation data through a specific waveform. When the transformation coefficient of the N-dimensional signal X on the transformation basis is k-sparse, if the number of samples M satisfies:

[0036] M=O(k log(N / k))M<

[0037] Then the original signal can be recovered from the compressed observed data by solving an optimization problem.

[0038] Since a single target is...

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Abstract

The invention discloses a method for positioning a wireless sensor network based on RSS. The method aims to widen application fields on the premise that positioning accuracy is guaranteed. The positioning step is divided into two stages, namely the coarse positioning stage and the fine positioning stage. In the coarse positioning stage, a compressed sensing technology is utilized to collect a small number of data as soon as possible to reconstruct a probable existence range of a target; in the fine positioning stage, according to a target positioning region acquired in the coarse positioning stage, a multilateral measuring technology is utilized to accurately position the positioning target. According to the method, the limitation that an unknown target only can be positioned in a grid center can be overcome, the application fields of the compressed sensing positioning method are widened, and complexity is lowered.

Description

technical field [0001] The invention relates to a wireless sensor positioning method, which belongs to the technical field of wireless communication technology, sensor technology and special self-organizing network of distributed computing. Background technique [0002] In recent years, with the popularization of wireless networks and the rapid development of ubiquitous computing, wireless positioning technology has been developed in the fields of medical care, education, public security and military affairs. As a special self-organizing network that combines wireless communication technology, sensor technology and distributed computing, the wireless sensor positioning system can be deployed in dangerous areas for long-term, collaborative real-time monitoring, and convenient positioning data processing. Therefore, based on wireless sensor Research on network positioning systems has been developed. [0003] Positioning using Received Signal Strength (RSS) parameters requires...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W64/00G01S5/00
Inventor 颜俊曹杨芹吴晓富朱卫平
Owner NANJING UNIV OF POSTS & TELECOMM
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