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RSSI-based indoor positioning method and system

A technology for indoor positioning and positioning base stations, which is applied in the directions of services, electrical components, and wireless communications based on location information, and can solve problems such as inaccurate positioning results.

Inactive Publication Date: 2017-06-16
SOUTHERN POWER GRID PEAK LOAD & FREQUENCY REGULATION GENERATING CO LTD
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Problems solved by technology

[0005] Based on this, it is necessary to provide an RSSI-based indoor positioning method and system with accurate positioning for the problem of inaccurate positioning results of general indoor positioning methods.

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  • RSSI-based indoor positioning method and system
  • RSSI-based indoor positioning method and system
  • RSSI-based indoor positioning method and system

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Embodiment Construction

[0023] In order to further explain in detail the technical principles of the RSSI-based indoor positioning method and system of the present invention, the conventional technology will be introduced in more detail below.

[0024] In the traditional positioning method based on RSSI, the measurement schematic diagram is as follows figure 1 As shown, the coordinates of the three positioning base stations used for positioning in this scene are (x1, y1), (x2, y2) and (x3, y3) respectively. Since RSSI varies with distance based on the received signal strength indicator, the distances d1, d2, and d3 from the reference node to the node to be measured or blind node (x, y) can be deduced from the measured values ​​of the RSSI received by each reference base station, Specifically, it is shown in formula (1). In the formula, A is the average value of the received signal strength at a distance of 1 meter from the signal source, n is the path loss index and is closely related to the specifi...

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Abstract

The invention provides an RSSI-based indoor positioning method and system. RSSI signals received by at least three positioning base stations are respectively acquired; Gaussian fitting processing is performed on the acquired RSSI signals, high probability RSSI signals meeting the preset probability threshold in the acquired RSSI signals are reserved and effective RSSI signals are acquired; wavelet transformation is performed on the effective RSSI signals, and the denoised effective RSSI signals are acquired; and indoor positioning is performed by using a Taylor algorithm improved by a positive definite correction matrix according to the denoised effective RSSI signals so as to acquire the positioning result. Data screening and denoising are performed by the Gaussian fitting and wavelet transformation processing in the whole process, the change of the measured RSSI value caused by movement of large equipment and personnel in the indoor scene is considered and the positive definite matrix is introduced to correct the error of estimation offset so as to enhance the positioning accuracy.

Description

technical field [0001] The present invention relates to the technical field of positioning, in particular to an RSSI-based indoor positioning method and system. Background technique [0002] Outdoors, people and vehicles are mainly positioned through the Beidou positioning system or the Global Positioning System (GPS). The accuracy of the current civilian system has reached within 10 meters, and the system accuracy is not directly related to the number of devices, which can meet the requirements of outdoor positioning. demand. In indoor scenes, how to design and implement positioning algorithms and systems suitable for indoor scenes is the key to the current positioning technology research. [0003] The general indoor positioning technology mainly completes the measurement and positioning of the target through the construction of an indoor positioning system and multiple base stations. Among them, the Taylor series algorithm based on received signal strength indication (Re...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/02H04W64/00
CPCH04W4/023H04W64/00
Inventor 黄观金高鹏叶萌陆信欣卢勇陈创波周华旭邹燕楠绍志成谷亚琼陈辉煌张斌郭起霖
Owner SOUTHERN POWER GRID PEAK LOAD & FREQUENCY REGULATION GENERATING CO LTD
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