Computer Science ›› 2017, Vol. 44 ›› Issue (7): 79-83.doi: 10.11896/j.issn.1002-137X.2017.07.014

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Adaptive Correction Model Location Algorithm Based on CSI

TIAN Li-wen and FENG Xiu-fang   

  • Online:2018-11-13 Published:2018-11-13

Abstract: Currently,WLAN-based indoor fingerprinting positioning system has been attractived owing to the advantages of open access and high accuracy.For the shortage that matching features do not consider the current environment variables for the reference environment in positioning stage of traditional indoor fingerprinting positioning systems,a novel CSI-based adaptive correction model location algorithm was proposed.The algorithm is used to indicate sub-carrier fluctuation level with the increasing of the number of people in indoor environment by introducing a indicator called PEM(Percentage of nonzero Elements),which can measure the changes of current indoor environment.At the same time,the algorithm also designs a new positioning correction matching model to compensate fingerprinting characteristic attenuation caused by multipath.Experiments have fully demonstrated that the new positioning scheme has an accuracy improvement of 30% and 15% respectively over previous fingerprint positioning system FIFS and CSI-MIMO.

Key words: Fingerprinting positioning,CSI,Adaptive correction model,PEM

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