CSI fingerprint indoor positioning method based on DHNN
An indoor positioning and fingerprint technology, applied in location information-based services, specific environment-based services, positioning, etc., can solve the problems of large differences in physical models, high positioning accuracy, and unsatisfactory positioning effects, and achieve high positioning accuracy, The effect of low quantity requirements
Inactive Publication Date: 2019-05-24
NORTHWEST NORMAL UNIVERSITY
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Problems solved by technology
However, the difference between the physical model and the actual environment is large and some interference factors are not taken into account, so the positioning effect is often not ideal compared with the fingerprint positioning method.
In the traditional CSI-based fingerprint indoor positioning method, the existence of problems such as poor fingerprint accuracy, low classification and matching effect, and susceptibility to environmental influences makes it unable to provide better positioning effect and higher positioning accuracy.
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[0042]The implementation mode of the present invention is illustrated by specific specific examples below, and those who are familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this description. Obviously, the described embodiments are a part of the present invention. , but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0043] see figure 1 , figure 2 and image 3 , providing a DHNN-based CSI fingerprint indoor positioning method, including offline phase L and online phase Z;
[0044] The offline phase L includes:
[0045] L01: Collect reference point CSI data: send continuous data packets to the computer through the wireless access point, collect and extract the CSI data of the reference point, and obtain th...
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The CSI fingerprint indoor positioning method based on the DHNN comprises the following steps: collecting and extracting CSI data of a reference point to obtain an initial data set; Processing redundant data and part of noise in the initial data set by using a low-pass filter to obtain a first intermediate data set; representing Reference point position information in the first intermediate data set through phase difference correction, another part of noise which does not conform to given characteristics and CSI data influenced by the multipath effect in the first intermediate data set are removed, and acquiring a second intermediate data set; Constructing a fingerprint database by taking the CSI of the reference point in the second intermediate data set as position fingerprint information; Setting the CSI of each reference point in the fingerprint database as an attractor, and taking the attractor as a DHNN convergence judgment basis; And inputting the CSI data of the test point intothe DHNN network, and carrying out convergence judgment on the CSI data of the test point and the data in the attractors to obtain a positioning result. The accuracy of fingerprint data is ensured, and the positioning precision is remarkably improved.
Description
technical field [0001] The embodiment of the present invention relates to the technical field of indoor positioning, in particular to a DHNN-based CSI fingerprint indoor positioning method. Background technique [0002] With the growing popularity of location-based services (Location Based Service, LBS), the demand for location-based services in life is also increasing. In the outdoor environment, the wide application of some mature satellite positioning systems such as GPS, GLONASS, and Beidou satellite navigation system provides convenience for people to obtain more accurate positioning and navigation services. However, in the indoor environment, due to the weak satellite signal and the inability to penetrate buildings, the satellite positioning system cannot work effectively. Therefore, the study of an indoor positioning system with high precision, high reliability and low cost is a proposal for the current indoor positioning technology. new challenge. [0003] In recen...
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IPC IPC(8): H04W4/021H04W4/33G01S5/02
Inventor 党小超唐续豪李彩霞邵晨光李焱郝占军
Owner NORTHWEST NORMAL UNIVERSITY