WLAN indoor tracking method based on particle filtering algorithm

A particle filter algorithm and particle technology, applied in computing, special data processing applications, instruments, etc., can solve the problem of tracking accuracy degradation, achieve the effect of reducing burden, taking into account effectiveness and reliability, and good environmental adaptability

Inactive Publication Date: 2010-10-20
HARBIN INST OF TECH
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Problems solved by technology

[0004] The present invention aims to solve the problem of tracking accuracy reduction caused by nonlinear model problems in the trac

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  • WLAN indoor tracking method based on particle filtering algorithm
  • WLAN indoor tracking method based on particle filtering algorithm
  • WLAN indoor tracking method based on particle filtering algorithm

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[0027] Specific implementation mode one, combination figure 1 In this specific implementation, the WLAN indoor tracking method based on the particle filter algorithm is implemented by the following steps:

[0028] Step 1. Arrange N access points AP for the indoor environment, ensure that any point in the environment is covered by the signal from one or more access points AP, and set N evenly in the indoor environment RP Reference points

[0029] Step 2: Select a reference point as the origin of the coordinate to establish a two-dimensional rectangular coordinate system to obtain N RP The coordinate position of two reference points in the two-dimensional rectangular coordinate system. In the offline phase, the signal receiver is used to collect the signal strength RSS value from each access point AP at each reference point, and the maximum likelihood method is used to calculate The prior probability distribution of signal strength at each reference point;

[0030] Step 3. At the k-th...

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Abstract

The invention provides a WLAN indoor tracking method based on a particle filtering algorithm, and relates to a WLAN indoor tracking method, and solving the problem that the tracking precision is reduced caused by the nolinear model when tracking a dynamic object in the indoor environment. The method comprises the following steps of: building signal intensity probability distribution of an off-line stage with the signal intensity value of a reference point, defining the reference point which has the shortest Euclidean distance with a particle point, taking the reference point as a particle point correcting valve to obtain each particle point and weight values corresponding thereto, and obtaining the estimated value of the position of the user after updating the weight value with a resample arithmetic. The method is suitable for the WLAN indoor tracking.

Description

technical field [0001] The invention relates to a WLAN indoor tracking method. Background technique [0002] WLAN network is the product of the combination of computer network and wireless communication technology. It uses radio frequency transmission technology to transmit data and provide users with wireless broadband access services. The development of WLAN has solved the problem of difficult wired network wiring, broken the geographical restrictions of broadband access, met the needs of users for mobile data communication, and realized the mobility, roaming and broadband of data communication. The emergence and continuous development of WLAN meet people's needs for high-efficiency, high-quality, high-bandwidth, and low-cost wireless network communications. The emergence and continuous development of WLAN meet people's needs for high-efficiency, high-quality, high-bandwidth, and low-cost wireless network communications. In actual use, the user terminal used for positio...

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Application Information

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IPC IPC(8): H04W16/20H04W84/12G06F17/00
Inventor 马琳徐玉滨刘菁宇刘宁庆沙学军孟维晓
Owner HARBIN INST OF TECH
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