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An Indoor Positioning Method Based on Wireless Signal Data Fusion

An indoor positioning and wireless signal technology, which is applied to services based on location information, services based on specific environments, positioning, etc., can solve the positioning blind area that does not solve the impact of internal noise positioning accuracy, and cannot give a description of the surrounding environment of the positioning position. , does not solve the positioning accuracy and other problems, to achieve the effect of improving indoor positioning accuracy, improving local positioning accuracy, and avoiding positioning blind spots

Active Publication Date: 2018-03-30
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
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AI Technical Summary

Problems solved by technology

However, this patent does not solve the problem of the influence of indoor noise on positioning accuracy and the elimination of positioning blind spots, and the system has certain limitations
[0007] Most of the existing technologies do not solve the impact of internal noise on positioning accuracy and the problem of positioning blind spots, nor can they give an intuitive description of the surrounding environment of the positioning position

Method used

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  • An Indoor Positioning Method Based on Wireless Signal Data Fusion
  • An Indoor Positioning Method Based on Wireless Signal Data Fusion
  • An Indoor Positioning Method Based on Wireless Signal Data Fusion

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Embodiment Construction

[0027]The technical problem to be solved by the present invention is to overcome the deficiency of single wireless technology in indoor positioning. In the existing method of using a single wireless technology for indoor positioning, the normal operation of the positioning system depends entirely on the corresponding wireless positioning technology. Once the wireless device fails to locate, the indoor positioning accuracy will be greatly affected, and the robustness is relatively low. Low, and easy to generate positioning blind spots, it is often impossible to ensure full coverage of wireless signals in indoor areas. The invention provides an indoor positioning method based on wireless signal data fusion, which performs noise reduction processing on wireless signals through a filtering algorithm, performs fusion positioning on Wi-Fi and RFID wireless signals, and the two technologies complement each other in the positioning process. Since these two positioning technologies can...

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Abstract

The invention discloses an indoor positioning method based on wireless signal data fusion, through the fusion of Wi-Fi signal and RFID signal, combined with the Kalman filter to perform noise optimization processing on the received signal, and the obtained optimized RSSI value Perform trilateration calculation to obtain the positioning coordinates of the mobile node. The invention utilizes the noise reduction processing of the Kalman filter to effectively reduce the interference of indoor noise on wireless signals and improve the indoor positioning accuracy. The indoor positioning accuracy is further improved through the fusion positioning of Wi-Fi technology and RFID technology, and the organic synergy and complementarity of these two positioning technologies greatly improves the robustness of the positioning method. Under the fusion positioning of Wi-Fi signal and RFID signal, not only the balance between indoor positioning accuracy and equipment cost is achieved, but also the description information about the surrounding environment of the object to be positioned can be obtained while the specific coordinates of the object to be positioned are obtained.

Description

technical field [0001] The invention relates to an indoor positioning method, which belongs to the cross-technical application field of mobile computing and signal processing, in particular to an indoor positioning method based on wireless signal data fusion. Background technique [0002] The positioning method of large-scale indoor environment strives to use different wireless signal technologies and corresponding distance calculation methods to quickly and efficiently locate the nodes to be positioned in a large-scale indoor environment, so as to obtain accurate object coordinates. [0003] Current indoor positioning algorithms are based on Wireless Fidelity (Wi-Fi), Wireless Sensor Network (WSN), Radio Frequency Identification (RFID), Bluetooth (Bluetooth) and Ultra Wideband (UWB). Band, UWB) and other wireless technologies. Use some typical positioning algorithms, such as SPA (self-positioning algorithm) relative positioning algorithm, convex programming positioning alg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/021H04W4/33G01S5/02
CPCG01S5/0257H04W4/023H04W4/04
Inventor 徐小龙王屹进李涛李千目徐佳
Owner NANJING UNIV OF POSTS & TELECOMM
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