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Underwater ultrasonic ranging by digital signal multiplexing with hadamard matrix

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5 Author(s)
Ebihara, T. ; Grad. Sch. of Syst. & Inf. Eng., Univ. of Tsukuba, Tsukuba, Japan ; Nishimiya, K. ; Mizutani, K. ; Wakatsuki, N.
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In this paper, we propose a new signal processing method for underwater ranging systems, which is based on signal processing methods for wireless mobile communication, to improve SNR characteristics without an iterative measurement. We also evaluated the performance of the proposed method using a propagation simulation. The obtained results suggest that the proposed method can improve SNR characteristics from 1.0 to 3.5 dB, compared to conventional ranging methods.

Published in:

Ultrasonics Symposium (IUS), 2009 IEEE International

Date of Conference:

20-23 Sept. 2009