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Title:Ultrasonic Signal Design for Beacon-based Indoor Localization
Author(s):Lu, Haofan
Contributor(s):Choudhury, Romit
Degree:B.S. (bachelor's)
Subject(s):Indoor localization
Signal Processing
Mobile Computing
Abstract:This work explores the signal design schemes that can be applied to a beacon-based indoor localization system. The localization system relies on measurements from Inertial Measurement Unit (IMU) on mobile phones to estimate users’ location. However, the noisy sensor data leads to accumulating error between actual and estimated positions. To reduce the localization error, re-calibration technique is required to bring the estimated position back to known landmarks. Regarding the re-calibration technique, our group identifies the opportunity of using acoustic signals generated by beacons attached to the power outlets to provide landmark information. The signal is inaudible to people, but it can be detected by users’ mobile phones. In this work, two signal design schemes: Dual-Tone Multi-Frequency Signaling (DTMF) and Modified Chirp Spread Spectrum (MCSS) are proposed and examined. The better scheme, MCSS, is tested along with the position estimation algorithm and has demonstrated effectiveness.
Issue Date:2021-05
Genre:Dissertation / Thesis
Date Available in IDEALS:2021-08-25

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