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Multi-feature fuzzy mapping access point optimization method based on information gain ratio

A technology of information gain ratio and optimization method, which is applied in the direction of location information-based services, specific environment-based services, and utilization of re-radiation, etc. It can solve the problem of only considering a single signal feature, unable to meet the requirements of indoor positioning development, and low positioning efficiency And other issues

Active Publication Date: 2020-10-09
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0004] However, with the in-depth research of researchers in the field of indoor positioning and the increasing demand for indoor positioning services in real life, many existing indoor positioning algorithms have been exhausted due to the consideration of only a single signal feature and low positioning efficiency. Can not meet the requirements of indoor positioning development

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  • Multi-feature fuzzy mapping access point optimization method based on information gain ratio
  • Multi-feature fuzzy mapping access point optimization method based on information gain ratio
  • Multi-feature fuzzy mapping access point optimization method based on information gain ratio

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[0061] specific implementation plan

[0062] The present invention will be further described below in conjunction with accompanying drawing:

[0063] like figure 1 A multi-feature fuzzy mapping access point optimization method based on information gain ratio is shown, which specifically includes the following steps:

[0064] Step 1, in the offline phase, deploy n (n is an integer) APs with known positions in the target environment and calibrate m (m is an integer) RPs.

[0065] Step 2: Collect RSS from different APs at each RP, and build an offline RSS feature matrix Z off ; Concretely include the following steps:

[0066] Step 2 (1), in the offline phase, for n APs transmitting signals, extract the received signal strength sequence RSS={rss at the RPs 1 ,rss 2 ,...,rss m}, where rss j Indicates the RSS from the APs in the target environment collected at the jth (j=1,2,...,m) RP; where, rss j ={rss 1j ,rss 2j ,...,rss nj}, rss ij Indicates the RSS from the i-th (i=...

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Abstract

The invention discloses a multi-feature fuzzy mapping access point optimization method based on an information gain ratio. The method comprises the following steps of: firstly, constructing an information gain ratio set of an access point (AP) and a fuzzy relation matrix of offline RSS characteristics by utilizing the offline RSS characteristics; secondly, obtaining fuzzy weights of the offline RSS characteristics by utilizing a fuzzy relation equation about the offline RSS characteristics; thirdly, acquiring RSS from different APs at a to-be-positioned point (namely a test point), and constructing a fuzzy judgment matrix of online RSS characteristics and a fuzzy membership set of APs in an online stage; and finally, defining the AP with a relatively large fuzzy membership degree as an APwith relatively strong position resolution, and using the AP as an optimized AP for positioning. Experimental results show that the method provided by the invention has relatively high positioning precision and relatively low calculation overhead.

Description

technical field [0001] The invention belongs to indoor positioning technology, and in particular relates to an access point optimization method for multi-feature fuzzy mapping based on information gain ratio. Background technique [0002] With the vigorous development of the Internet, Location-based Services (LBS) is playing an increasingly important role in people's lives, such as shopping mall advertising guidance, monitoring management, disaster rescue and other scenarios for navigation and positioning services. There is an urgent need. However, in a complex indoor environment, there are usually many building occluders and irregular movement of people, which leads to serious fluctuations, reflections, diffractions, and other phenomena in the signal propagation, which leads to the positioning technology in indoor scenes. performance still needs to be improved. At present, the indoor positioning systems extensively researched by relevant enterprises and universities are m...

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Application Information

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IPC IPC(8): H04W4/02H04W4/021H04W4/33G01S11/06
CPCH04W4/021H04W4/023H04W4/33G01S11/06
Inventor 周牧李欣玥杨小龙王勇何维
Owner CHONGQING UNIV OF POSTS & TELECOMM
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