Signal intensity-based multi-object positioning method in dynamic environment

A technology of signal strength and dynamic environment, applied in the field of wireless communication and computer science, to achieve the effect of improving positioning efficiency

Inactive Publication Date: 2012-10-03
GUANGZHOU HKUST FOK YING TUNG RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The present invention solves the existing problems of using wireless signal maps for indoor positioning from two aspects

Method used

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  • Signal intensity-based multi-object positioning method in dynamic environment
  • Signal intensity-based multi-object positioning method in dynamic environment
  • Signal intensity-based multi-object positioning method in dynamic environment

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] Such as figure 1 As shown, the positioning method of the present invention differs from the traditional wireless signal map mainly in the data stored in the database. The traditional wireless signal ground directly stores and collects signal strengths from various reference nodes in a wireless signal map. The invention processes the received signal strength, uses frequency diversity to separate line-of-sight distance signals from multipaths, stores them in a database, and establishes line-of-sight distance wireless signal maps.

[0026] Such as figure 2 As shown,. In multi-object positioning, multiple objects interact with each other, making it very difficult to use traditional wireless signal maps for positioning. The main reason is that it is unrealistic to list the combinations of different numbers of objects. This effect mainly comes fro...

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Abstract

The invention relates to a signal intensity-based multi-object positioning method in a dynamic environment. According to the method, a wireless signal map is established only by utilizing received signal intensity information when a multipath effect exists indoor, so that the map can be used for determining the positions of a plurality of target objects at the same time; and moreover, the map does not need to be established repeatedly when the environment changes. According to the method, fingerprint identification information is acquired first, a signal intensity value corresponding to sight distance is stored in a database, and then comparison is performed during a target object positioning stage; the obtained sight signal intensity can be directly applied to positioning by distinguishing a sight path from a plurality of paths; and therefore, the positioning accuracy is improved; and the precise positioning is performed in a dynamic indoor environment.

Description

technical field [0001] The invention relates to a method for multi-object positioning in a dynamic environment by using signal strength ranging technology. This method uses the received signal strength to establish a line-of-sight wireless signal map (radio map), so that multiple objects can be positioned separately in a dynamic environment. The invention belongs to the technical field of wireless communication and computer science. Background technique [0002] The ranging and positioning technology based on received signal strength has received extensive attention in recent years. The main method is to obtain the corresponding distance information based on the signal strength. [0003] Existing positioning technologies based on signal strength are mainly based on the relationship between received signal strength and distance. Theoretically speaking, the signal strength is proportional to the distance. Generally, the signal strength decreases as the distance increases. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/02
Inventor 郭小楠张滇倪明选
Owner GUANGZHOU HKUST FOK YING TUNG RES INST
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