A Received Signal Strength Estimation Method Based on Generalized Extended Approximation Model

A technology of receiving signal strength and models, applied to services based on location information, services based on specific environments, beacon systems using radio waves, etc., can solve the problems of consuming huge manpower and financial resources, and the location of APs is unknown. Achieve the effect of reducing workload and ensuring positioning accuracy

Active Publication Date: 2022-04-29
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0004] As the number of reference points increases, the fingerprint information can better reflect the changing trend of the RSS value in the actual indoor environment, so the positioning accuracy of the system is higher. The position of the AP in the scene is usually unknown, and it is no longer suitable to use the model method to estimate the RSS value

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  • A Received Signal Strength Estimation Method Based on Generalized Extended Approximation Model
  • A Received Signal Strength Estimation Method Based on Generalized Extended Approximation Model
  • A Received Signal Strength Estimation Method Based on Generalized Extended Approximation Model

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[0058] specific implementation plan

[0059] The present invention will be further described below in conjunction with accompanying drawing:

[0060] Such as figure 1 A method for estimating received signal strength based on a generalized continuation approximation model is shown, which specifically includes the following steps:

[0061] Step 1. The user moves randomly in the target area, and records the received signal strengths ( Received Signal Strength, RSS);

[0062] Step 2: Segment the motion path according to the relative positions of the N RPs, and filter the divided sub-paths according to the applicable conditions of the generalized continuation approximation model to obtain s usable sub-paths. Specifically include the following steps:

[0063] Step 2 (1): Starting from the initial RP (that is, the RP with the earliest time label on the subpath), calculate the relative distance between it and the subsequent RP in sequence. If a certain RP is found Q (Q=3,L,N) The...

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Abstract

The invention discloses a method for estimating received signal strength based on a generalized continuation approximation model. First, the user moves randomly in the target area, and measures the received signal strength (Received Signal) received from multiple unknown wireless access points (Access Point, AP) at several reference points (Reference Point, RP) on the path. Strength, RSS), and split and filter the path at the same time; then take the RSS value of an AP received by each RP as an example, and establish a horizontal and vertical Cartesian coordinate system of coordinates; then, the unit domain and its corresponding continuation domain are divided, and the unknown coefficients of the interpolation function defined in the unit domain are solved; then, an iterative algorithm is performed on the basis of the previously divided unit domain; finally , to restore a curve that is highly fitted to the real function. The patent of the present invention makes full use of the extra information of the continuation domain, which ensures the accuracy of positioning while reducing the cost of building a database.

Description

technical field [0001] The invention belongs to indoor positioning technology, in particular to a method for estimating received signal strength based on a generalized continuation and approximation model. Background technique [0002] With the gradual development of the mobile Internet era to the Internet of Things era, location-based services (Location-based Service, LBS) have been more and more widely used in people's lives. Currently popular wireless positioning systems include Global Positioning System (Global Position System, GPS), cellular positioning system, Bluetooth positioning system, radio frequency identification positioning system, ZigBee positioning system and WLAN positioning system. Among them, the GPS positioning system is the most common because it has better performance in the field of outdoor positioning. However, in the indoor environment, due to the occlusion of various obstacles and moving objects, the satellite signal attenuation is very serious, wh...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/02H04W4/021H04W4/33G01S1/04G01S1/14
CPCH04W4/021H04W4/023H04W4/33G01S1/14G01S1/045
Inventor 周牧龙玥辛杨小龙何维谢良波聂伟
Owner CHONGQING UNIV OF POSTS & TELECOMM
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