Indoor positioning and tracking method based on secondary partition and gradient fingerprint match

A two-level partitioning and indoor positioning technology, applied in positioning, nan, instruments, etc., can solve the problems of low positioning accuracy, complex preprocessing, high maintenance cost, reduce the cost of regular maintenance, ensure high-precision fingerprint positioning, implement simple effect

Active Publication Date: 2017-02-15
NANJING UNIV OF POSTS & TELECOMM
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AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to solve the low positioning accuracy due to the jitter of the received signal strength value of the fixed reference point caused by factors such as non-line-of-sight, reflection, and multipat...

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  • Indoor positioning and tracking method based on secondary partition and gradient fingerprint match
  • Indoor positioning and tracking method based on secondary partition and gradient fingerprint match
  • Indoor positioning and tracking method based on secondary partition and gradient fingerprint match

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with the accompanying drawings and examples. It should be noted that the described embodiments are only intended to facilitate the understanding of the present invention, and have no limiting effect on it.

[0042] Indoor positioning and tracking method based on two-level partition and fingerprint gradient matching, the main steps and their development are as follows Figure 4 with Figure 5 shown, including the following steps:

[0043] Step 1: Obtain the underlying feature fingerprint library. This fingerprint library is mainly used to obtain the feature fingerprint of the reference point, including collecting and processing the reference point data, obtaining the first-level partition dictionary, dividing the AP clustering into the second-level partition and extracting the second-level partition center The identification index, the reference point attribute for manual label training, and the cluste...

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Abstract

The invention discloses an indoor positioning and tracking method based on secondary partition and gradient fingerprint match. The method mainly comprises the following steps: acquiring an underlying feature fingerprint library, and acquiring a primary partition dictionary; acquiring a gradient fingerprint atlas, acquiring a multilevel partition classifier according to characteristic fingerprint of a training reference point, and predicting a partition to which the test belongs; positioning step: acquiring the belonging partition by using the multilevel partition classifier, and predicting position coordinates of a to-be-tested positioning point; and finally tracking step: tacking and positioning all kinds of motion modes, predicting current position coordinates and a current movement trajectory by using an indoor motion ranging algorithm and the reference position coordinates in the previous step to complete the periodic position joint tracking and positioning of fingerprint positioning. The generated gradient fingerprint atlas can process time varying effects and RSS measurement diversity of heterogeneous equipment, thereby greatly reducing the periodic maintenance cost of the fingerprint atlas, and the gradient fingerprint atlas can not only guarantee high-precision fingerprint positioning, but also can compress a mobile terminal database and improve the performance.

Description

technical field [0001] The invention belongs to the field of indoor positioning, and in particular relates to an indoor positioning and tracking method based on secondary partition and fingerprint gradient matching. Background technique [0002] In recent years, due to the development of the mobile Internet and the increasing demand for location-based services (LBS, Location-Based Service), indoor positioning has attracted much attention in academia and industry. One of the research hotspots in this field. [0003] Indoor positioning technology mainly includes technologies based on Wi-Fi, infrared, radio frequency identification (RFID), ultrasonic, based on ZigBee (IEEE 802.15.4 standard low-power LAN protocol), Bluetooth, indoor microphone array, inertial tracking based on motion sensors, etc. . Among them, Wi-Fi is a wireless local area network based on the IEEE 802.11 standard. It has the characteristics of high bandwidth, high speed, and high coverage, and has incompar...

Claims

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Application Information

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IPC IPC(8): H04W4/04G01S5/02
Inventor 暴建民仇雷
Owner NANJING UNIV OF POSTS & TELECOMM
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