Title :
P2D-2 Quantitative Estimation of Ultrasonic Multiple Access Method Based on M-Sequence Code
Author :
Wang, Yong ; Siginouchi, Takehiko ; Hashimoto, Masahiko ; Hachiya, Hiroyuki
Author_Institution :
Matsushita Electr. Ind. Co. Ltd., Kyoto
Abstract :
Recently, we have proposed an ultrasonic multiple access method based on the spectrum spread technology using M-sequence codes. However, its effect depends on the preset threshold level. In this paper, we consider a novel quantitative estimation method using the normalized cross-correlation function between two microphones. Using this quantitative estimation method, we investigate the effect of the preset level and show the optimal value of the preset threshold.
Keywords :
m-sequences; microphones; sonar signal processing; spread spectrum communication; ultrasonic propagation; M-sequence code; microphones; normalized cross-correlation function; quantitative estimation method; spectrum spread technology; ultrasonic multiple access method; Amplitude estimation; Delay estimation; Frequency estimation; Interference; Loudspeakers; Microphones; Sonar detection; Sonar measurements; Sonar navigation; Time measurement;
Conference_Titel :
Ultrasonics Symposium, 2007. IEEE
Conference_Location :
New York, NY
Print_ISBN :
978-1-4244-1384-3
Electronic_ISBN :
1051-0117
DOI :
10.1109/ULTSYM.2007.396
