Yong Wang, T. Siginouchi, M. Hashimoto, H. Hachiya
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引用次数: 1
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.
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