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A Combined Positioning Method Based on Particle Filter Dead Reckoning and WLAN

A wireless local area network and dead reckoning technology, applied in navigation calculation tools, navigation, surveying and navigation, etc., can solve the problems of pedestrian indoor navigation positioning accuracy reduction, GPS signal attenuation and other problems, and achieve the effect of high feasibility and high precision

Inactive Publication Date: 2017-12-29
BEIHANG UNIV
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  • Claims
  • Application Information

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Problems solved by technology

However, inside the building, the GPS signal attenuation is serious, resulting in a serious reduction in the accuracy of pedestrian indoor navigation and positioning

Method used

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  • A Combined Positioning Method Based on Particle Filter Dead Reckoning and WLAN
  • A Combined Positioning Method Based on Particle Filter Dead Reckoning and WLAN
  • A Combined Positioning Method Based on Particle Filter Dead Reckoning and WLAN

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Embodiment Construction

[0044] figure 1 It is a flowchart of the method of the present invention, and the present invention is implemented in four steps, specifically:

[0045] Step 1. Use dead reckoning technology to realize indoor tracking.

[0046] Step 2. Use wireless local area network RSSI technology to achieve spatial positioning

[0047] The fingerprint database of signal strength in a specific space is established by using the signal strength values ​​corresponding to different signal sources, and the pattern recognition algorithm is used to complete the spatial positioning in the fingerprint database. At present, the commonly used pattern recognition algorithms include k-nearest neighbor method, kernel function estimation method and artificial neural network estimation method.

[0048] Step 3: Establish system state model and observation model.

[0049] In this method, the state vector is

[0050] The distance that the pedestrian moves in the two filtering algorithm solution cycles is...

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Abstract

The invention provides a new method for dead reckoning and WLAN (wireless local area network) integrated positioning based on particle filter. The method comprises four steps: step 1, performing dead reckoning to realize space tracking; step 2, performing WLAN RSSI positioning; step 3, establishing a suitable system state model and an observation model; and step 4, carrying out iterative operation by utilizing a particle filter algorithm. The new method for the dead reckoning and the WLAN integrated positioning based on the particle filter is very simple and practical, and has high location precision and feasibility.

Description

technical field [0001] The invention provides a combined positioning method based on particle filter dead track reckoning and wireless local area network, and belongs to the technical field of pedestrian autonomous navigation and positioning. Background technique [0002] At present, pedestrian autonomous navigation and positioning has gradually become an indispensable part of people's daily life. Traditional pedestrian navigation and positioning mostly rely on GPS positioning technology. However, in buildings, GPS signal attenuation is serious, which leads to a serious decrease in the accuracy of pedestrian indoor navigation and positioning. In order to achieve accurate indoor navigation and positioning of pedestrians, dead reckoning technology and wireless local area network-based RSSI positioning technology are gradually emerging. However, limited by the accuracy of the MEMS inertial device, the error of the dead reckoning is often large; the RSSI positioning technology...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C21/00
CPCG01C21/20
Inventor 晁代宏袁也宋来亮冉龙俊刘弘毅
Owner BEIHANG UNIV