Abstract
In the paper, an indoor positioning scheme combining pedestrian dead reckoning (PDR) and magnetic strength matching (MSM) is proposed. PDR is conducted by sensing acceleration and angular speed through the 3-axis accelerometer in iphone7 and a fabricated high-precision rotational gyroscope. Low bias stability (0.5°/h) of the gyroscope contributes to a small accumulative error in heading angle estimation. Through data analysis to outputs of the accelerometer and the gyroscope, human motion, such as walking a step, walking upstairs or downstairs, turning left or right, is recognized and walking path is reckoned with motion information. Magnetic strength is measured by the magnetometer in iphone7 and MSM positioning result is used to reduce error of reckoned heading angle. The error rate of downstairs/upstairs step count is low and after heading angle correction by MSM, a satisfactory indoor positioning result is obtained.
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Chen, D., Zhang, W., Zhang, Z. (2020). Indoor Positioning with Sensors in a Smartphone and a Fabricated High-Precision Gyroscope. In: Liang, Q., Liu, X., Na, Z., Wang, W., Mu, J., Zhang, B. (eds) Communications, Signal Processing, and Systems. CSPS 2018. Lecture Notes in Electrical Engineering, vol 516. Springer, Singapore. https://doi.org/10.1007/978-981-13-6504-1_134
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DOI: https://doi.org/10.1007/978-981-13-6504-1_134
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