Heading Estimation for Indoor Pedestrian Navigation Using a Smartphone in the Pocket

Sensors
Zhi-An DengDi Wu

Abstract

Heading estimation is a central problem for indoor pedestrian navigation using the pervasively available smartphone. For smartphones placed in a pocket, one of the most popular device positions, the essential challenges in heading estimation are the changing device coordinate system and the severe indoor magnetic perturbations. To address these challenges, we propose a novel heading estimation approach based on a rotation matrix and principal component analysis (PCA). Firstly, through a related rotation matrix, we project the acceleration signals into a reference coordinate system (RCS), where a more accurate estimation of the horizontal plane of the acceleration signal is obtained. Then, we utilize PCA over the horizontal plane of acceleration signals for local walking direction extraction. Finally, in order to translate the local walking direction into the global one, we develop a calibration process without requiring noisy compass readings. Besides, a turn detection algorithm is proposed to improve the heading estimation accuracy. Experimental results show that our approach outperforms the traditional uDirect and PCA-based approaches in terms of accuracy and feasibility.

Citations

Jan 23, 2016·Sensors·Duy Duong Pham, Young Soo Suh
May 14, 2016·Sensors·Kourosh Khoshelham, Sisi Zlatanova
Jul 3, 2016·The Review of Scientific Instruments·Shengzhi ZhangSheng Liu
Dec 16, 2016·Sensors·Zengshan TianZe Li
Jul 3, 2020·Sensors·Tobias FeiglChristopher Mutschler
May 5, 2018·Sensors·Jian KuangXingeng Chen
Nov 11, 2021··Guobin ShenPengfei Zhou
Sep 19, 2020··Sheng ShenRomit Roy Choudhury

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Methods Mentioned

BETA
PCA
infrared ray

Software Mentioned

uDirect
PCA
RMPCA

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