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RSSI-based weighted centroid positioning algorithm improvement method

A positioning algorithm and weighted centroid technology, which can be applied to services based on location information, services based on specific environments, positioning, etc., can solve problems such as the disjoint circles of anchor nodes, and achieve the goal of improving accuracy, improving the degree of optimization, and reducing positioning errors. Effect

Inactive Publication Date: 2020-12-25
LIAONING TECHNICAL UNIVERSITY
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Problems solved by technology

[0010] In the positioning stage, the present invention selects the distance scale model, which solves the unsolvable situation caused by the disjoint circles of the anchor nodes

Method used

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  • RSSI-based weighted centroid positioning algorithm improvement method
  • RSSI-based weighted centroid positioning algorithm improvement method
  • RSSI-based weighted centroid positioning algorithm improvement method

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Embodiment Construction

[0027] The specific implementation of the present invention will be described in detail below in conjunction with the accompanying drawings. As a part of this specification, the principles of the present invention will be described through examples. Other aspects, features and advantages of the present invention will become clear through the detailed description. In the referenced drawings, the same reference numerals are used for the same or similar components in different drawings.

[0028] Such as figure 1 As shown, the present invention introduces improved Gaussian filter model, distance scale model and RSSI-DSW positioning algorithm, figure 2 A distance scale model is shown.

[0029] The improved method of the weighted centroid positioning algorithm based on RSSI is characterized in that, comprising the following steps:

[0030] Step S1: The anchor node periodically sends its own information to the surrounding, including node ID and its own location information;

[00...

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Abstract

The invention discloses an RSSI-based weighted centroid positioning algorithm improvement method, which aims at solving the problem of RSSI ranging errors in a wireless sensor network and improving unreasonable factors existing in a weighted centroid algorithm. A new positioning (RSSI-DSW) algorithm combining a ranging centroid algorithm based on a signal intensity indicator and a weighted centroid positioning algorithm is provided. In the ranging stage, due to the complexity and randomness of the indoor environment, the collected signal intensity has a large error, on the basis, an improved Gaussian filtering algorithm is provided for filtering the received RSSI value, the filtered RSSI value serves as a final value for distance conversion, and according to the algorithm, the ranging error is reduced to a certain extent, and the positioning precision is improved.

Description

technical field [0001] The invention belongs to the technical field of wireless sensor positioning, in particular to an improved method of RSSI-based weighted centroid positioning algorithm. Background technique [0002] In recent years, with the rapid development of science and technology such as the Internet of Things and artificial intelligence, wireless sensor networks have become a hot research field today. In the past few years, many tiny wireless devices and embedded devices have appeared one after another, and the rapid development of wireless sensors is changing our living environment. Wireless Sensor Network (WSN) is composed of a large number of sensors with small size, low energy consumption, low price and computing, communication, storage and even mobile functions. passed to the observer. The ability of WSN to dynamically perceive, process and deliver messages makes WSN applied in all aspects of human activities, including military, medical, daily, commercial,...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/02H04W4/33H04W64/00H04W84/18G01S5/14
CPCH04W4/025H04W4/33H04W64/00G01S5/14H04W84/18
Inventor 任晓奎于百川李岩
Owner LIAONING TECHNICAL UNIVERSITY
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