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Indoor wlan signal map drawing and mapping method based on image edge detection signal correlation

A technology for detecting signal and image edges, applied in the field of indoor WLAN signal mapping and mapping, can solve the problem of low positioning accuracy, achieve high regional positioning accuracy, clear connection relationships, and improve readability.

Active Publication Date: 2017-07-18
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

The positioning algorithm adopted by the RADAR positioning system is simple and easy to implement, but the positioning accuracy is not high, and its maximum positioning error exceeds 20m

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  • Indoor wlan signal map drawing and mapping method based on image edge detection signal correlation
  • Indoor wlan signal map drawing and mapping method based on image edge detection signal correlation
  • Indoor wlan signal map drawing and mapping method based on image edge detection signal correlation

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Embodiment Construction

[0045] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0046] An indoor WLAN signal map drawing and mapping method based on image edge detection signal correlation provided by the present invention, such as figure 1 As shown, the method includes the following steps:

[0047] Step 1: The user randomly collects several WLAN received signal strength sequences in the positioning target area Among them, M j is the sequence length of the jth sequence, that is, the number of received signal strength vectors; z is the number of sequences; RSS jk =(RSS jk1 ,...,RSS jkn )(k=1,...,M j ) is the kth received signal strength vector in the jth sequence; n is the number of APs; RSS jkr (r=1,...,n) is the signal strength value from the rth AP in the kth received signal strength vector of the jth sequence;

[0048] Step 2: In S j In , the received signal strength vectors are sorted in ascending order us...

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Abstract

The invention relates to an indoor WLAN signal map drawing and mapping method based on image edge detection signal correlation. The method includes the step that firstly, RSS sequences collected by a random user are utilized to construct clustering charts of received signal strength (RSS) sequences through spectral clustering; secondly, a signal logic diagram of the random user in a located object area is constructed by the utilization of the image edge detection method; next, mapping between RSS clustering nodes in the signal logic diagram and area position nodes in a physical environment diagram is established according to corresponding mapping rules; finally, position estimation on a target user is achieve by the utilization of the mapping relation between the signal logic diagram and the physical environment diagram, and meanwhile the signal logic diagram and the physical environment diagram are drawn by the utilization of drawing techniques. The method has the advantages that the readability of the diagrams is improved, and the connection relation between the nodes in the signal logic diagram and the nodes in the physical environment diagram are clearer.

Description

technical field [0001] The invention relates to a signal map drawing and mapping method, in particular to an indoor WLAN signal map drawing and mapping method based on image edge detection signal correlation. Background technique [0002] With the widespread deployment of wireless local area networks, the use of WLAN (Wireless Local Area Network) infrastructure for positioning can greatly reduce the investment in positioning facilities and system maintenance. At present, indoor WLAN positioning technology based on received signal strength has been extensively researched. Typical positioning systems based on RSS (Received Signal Strength) location fingerprints include the RADAR system developed by Microsoft Research and the Horus system proposed by the University of Maryland. The RADAR system was first proposed by Microsoft in 2000. Its basic idea is to select a certain number of reference points from the target area in the offline phase, and measure signals from different ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T11/00
Inventor 周牧张巧田增山邱枫范馨月周祥东蒋青周翊
Owner CHONGQING UNIV OF POSTS & TELECOMM
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