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Indoor positioning method based on wireless signal data fusion

An indoor positioning and wireless signal technology, applied in the service, wireless communication, positioning and other directions based on location information, can solve the problem of positioning accuracy, cannot give a description of the surrounding environment of the positioning position, and does not solve the influence of internal noise positioning accuracy. Positioning blind spots and other problems, to achieve the effect of improving indoor positioning accuracy, improving local positioning accuracy, and avoiding positioning blind spots

Active Publication Date: 2015-05-20
NANJING UNIV OF POSTS & TELECOMM
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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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  • Indoor positioning method based on wireless signal data fusion
  • Indoor positioning method based on wireless signal data fusion
  • 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 adopting a mode of fusing WIFI (wireless fidelity) signals and RFID (radio frequency identification) signals, a Kalman filter is combined for carrying out noise optimization processing on received signals, in addition, the obtained optimized RSSI (received signal strength indicator) value is subjected to three-edge measurement calculation, so that a positioning coordinate of the moving node is obtained. The indoor positioning method has the advantages that the noise reducing processing of the Kalman filter is used, the interference of the indoor noise on wireless signals can be effectively reduced, and the indoor positioning precision is improved. The indoor positioning precision is further improved through the fusion positioning of the WIFI technology and the RFID technology, and in addition, the robustness of the positioning method is greatly improved through the organic cooperation complementation of the two positioning technologies. Through the fusion positioning of the WIFI signals and the RFID signals, the balance point of the indoor positioning precision and the equipment cost expenditure is obtained, in addition, the concrete coordinate of an object to be positioned is obtained, and meanwhile, the description information about ambient environment of the object to be positioned can also be known.

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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IPC IPC(8): H04W4/04G01S5/02
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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