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Multi-label cooperative positioning method based on weighted MDS

A collaborative positioning and multi-label technology, applied in location information-based services, specific environment-based services, positioning, etc., can solve problems such as difficulty in indoor positioning, both accuracy and robustness, and failure to meet positioning needs

Inactive Publication Date: 2018-11-02
TIANJIN UNIV
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Problems solved by technology

These positioning systems only have good positioning performance in outdoor environments, but for indoor environments, due to the inability of satellite signals to penetrate buildings, coupled with the complex indoor environment, many obstacles, and the movement of people, the indoor positioning effect It is difficult to have both accuracy and robustness at the same time, which cannot meet people's positioning needs in indoor environments

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  • Multi-label cooperative positioning method based on weighted MDS
  • Multi-label cooperative positioning method based on weighted MDS
  • Multi-label cooperative positioning method based on weighted MDS

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Embodiment Construction

[0016] A weighted MDS-based multi-tag cooperative positioning method according to the present invention will be further described below in conjunction with the accompanying drawings.

[0017] 1, figure 1 It shows the positioning scene diagram of the algorithm proposed by the present invention. In an indoor environment of 10m×10m, the position coordinates of the four readers are R 1 (0,0), R 2 (10,0), R 3 (10,10), R 4 (0,10). Randomly scatter tags in the scene, we use the reader close to the tag as the excitation source of the tag, in the figure the tag T 1 , T 2 and T 3 The excitation source is R 1 . In Tag-to-Tag communication, the tag closest to the excitation source is used as the transmitting tag, and the other one is used as the receiving tag. at T 1 -to-T 2 and T 1 -to-T 3 communication link, T 1 is the emission tag; T 2 -to-T 3 communication link, T 2 is the launch tag.

[0018] 2, figure 2 shows the channel model between the tag and the reader, and ...

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Abstract

The invention relates to a multi-label cooperative positioning method based on weighted MDS. The multi-label cooperative positioning method comprises the steps of: placing target tags in an indoor scene, and estimating a region range in which the target tags are located according to distances from the target tags to readers; establishing an Euclidean distance matrix D<^>; calculating to obtain a scalar product matrix Bs<^> according to a relationship between a scalar product matrix and the Euclidean distance matrix; and adopting a weighted MDS algorithm for positioning the target tags, whereinthe positioning is implemented by regarding a unit matrix I<M+N> as the weight of the algorithm at first to obtain positions of the target tags, regarding the positions as initial estimated positionsof the target tags in the following iterative calculation, utilizing the obtained estimated positions of the target tags, adopting residual vector variance as the new weight W of the algorithm, acquiring new estimated positions of the target tags again until the positioning precision meets the requirement, and outputting the finally-obtained estimated positions X0<^> of the target tags.

Description

technical field [0001] The invention belongs to the range-based indoor positioning field, uses a backscatter channel model to estimate the distance between tags, and uses a weighted MDS algorithm to realize multi-tag position estimation. Background technique [0002] In recent years, with the rise of the concept of the Internet of Things, wireless technology and related positioning technology have received extensive attention from experts and scholars at home and abroad. The application fields of positioning technology are very extensive, including industry, agriculture, commercial military and other aspects. At present, there are four main positioning systems in the world: the Global Positioning System (GPS) of the United States, the Beidou Satellite Navigation System (BDS) of China, and the Russian The GLONASS satellite navigation system (GLONASS) and the European Galileo satellite navigation system (GALILEO). These positioning systems only have good positioning performan...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/04H04W4/02H04W4/33G06K17/00
CPCG01S5/04G06K17/0022H04W4/023H04W4/33
Inventor 马永涛蒋悦
Owner TIANJIN UNIV
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