Abstract
Ultrasonic distance measurement is based on determining the time of flight of ultrasonic wave. The pulse compression technique that obtains the cross-correlation function between the received signal and the reference signal is used to improve the resolution of distance measurement. The cross-correlation method requires high-cost digital signal processing. This paper presents a cross-correlation method using a delta–sigma modulated single-bit digital signal. Sensor signal processing composed of the cross-correlation between two single-bit signals and a post-moving average filter is proposed and enables reducing the cost of digital signal processing.
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Hirata, S., Kurosawa, M., Katagiri, T. (2008). Sensor Signal Processing for Ultrasonic Sensors Using Delta–Sigma Modulated Single-Bit Digital Signal. In: Akiyama, I. (eds) Acoustical Imaging. Acoustical Imaging, vol 29. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-8823-0_44
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DOI: https://doi.org/10.1007/978-1-4020-8823-0_44
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-8822-3
Online ISBN: 978-1-4020-8823-0
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