Title :
Underwater ultrasonic ranging by digital signal multiplexing with hadamard matrix
Author :
Ebihara, Tadashi ; Nishimiya, Kojiro ; Mizutani, Keiichi ; Wakatsuki, Naoto ; Mizutani, Keiichi
Author_Institution :
Grad. Sch. of Syst. & Inf. Eng., Univ. of Tsukuba, Tsukuba, Japan
Abstract :
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.
Keywords :
Hadamard matrices; acoustic signal processing; iterative methods; multiplexing; sonar; ultrasonic propagation; underwater acoustic propagation; Hadamard matrix; SNR characteristics; digital signal multiplexing; iterative measurement; propagation simulation; signal processing; underwater ranging system; underwater ultrasonic ranging; Acoustic measurements; Acoustic propagation; Electromagnetic propagation; Electromagnetic scattering; Oceans; Sea measurements; Signal processing; Ultrasonic variables measurement; Underwater acoustics; Underwater communication;
Conference_Titel :
Ultrasonics Symposium (IUS), 2009 IEEE International
Conference_Location :
Rome
Print_ISBN :
978-1-4244-4389-5
Electronic_ISBN :
1948-5719
DOI :
10.1109/ULTSYM.2009.5442072
