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Title
Japanese: 
English:Sensor signal processing circuit for echolocation using a delta-sigma modulated single-bit digital signal 
Author
Japanese: 平田慎之介, 黒澤実, 片桐崇.  
English: Shinnosuke Hirata, Minoru Kuribayashi Kurosawa, Takashi Katagiri.  
Language English 
Journal/Book name
Japanese: 
English:J. Acoust. Soc. Am. 
Volume, Number, Page Vol. 120    No. 5    pp. 3218
Published date Nov. 2006 
Publisher
Japanese: 
English: 
Conference name
Japanese: 
English:4th joint meeting of the Acoustical Society of America and the Acoustical Society of Japan 
Conference site
Japanese: 
English:Honolulu, Hawaii, U.S.A. 
Abstract Ultrasonic sensors are suitable for perception of the environment of mobile autonomous robots. Most bats use echolocation that is high-quality sensing system by their ultrasonic sensors. The echolocation can estimate the distance to the object, its relative velocity and its scale. But technological application of echolocation requires a large computational requirement because delay of the echo signal from the generated signal is estimated from cross-correlation between the generated signal and the echo signal. A new sensor signal processing for echolocation is proposed by using a delta-sigma modulated single-bit digital signal. A delta-sigma modulated single-bit digital signal is a single-bit high-speed data stream. Using delta-sigma modulated single-bit digital signal processing, multiply and accumulation of cross-correlation can be changed into logical-operations: EXOR, NOT, SUM. Simulations show the possibility of estimation of the distance to the object from correlation of the echo signal with the generated signal converted single-bit data stream, along with reduce computational and circuit-scale requirements.

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