Robust High Accuracy Ultrasonic Range Measurement System

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Title: Robust High Accuracy Ultrasonic Range Measurement System
Authors: Saad, Mohamed M.
Bleakley, Chris J.
Dobson, Simon
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Date: Oct-2011
Abstract: This paper presents a novel method for ultrasonic range estimation. The method uses a wideband frequency-hop spread spectrum ultrasonic signal to increase robustness to noise and reverberation. The method applies cross-correlation with earliest peak search and a novel minimum variance search technique to correct the error in the cross-correlation time-of-flight estimate to within one wavelength of the carrier before applying a phase-shift technique for subwavelength range refinement. The method can be implemented digitally in software and only requires low-cost hardware for signal transmission and acquisition. Experimental results show an accuracy of better than 0.5 mm in a typical office environment.
Type of material: Journal Article
Publisher: IEEE
Copyright (published version): 2011 IEEE
Keywords: Cross-correlation;Frequency-hop spread spectrum (FHSS);Phase shift;Range estimation;Ultrasonic
Subject LCSH: Signal processing
Frequencies of oscillating systems--Measurement
Ultrasonic waves
DOI: 10.1109/TIM.2011.2128950
Language: en
Status of Item: Not peer reviewed
Appears in Collections:Computer Science Research Collection

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