Title :
The acoustic communication experiment at 1,600 m depth using QPSK and 8PSK
Author :
Ochi, H. ; Watanabe, Y. ; Shimura, T. ; Hattori, T.
Author_Institution :
Japan Agency for Marine-Earth Sci. & Technol. (JAMSTEC), Yokosuka, Japan
Abstract :
Research and development on underwater acoustic communications are in progress in our group. In January, 2010, we carried out the sea area experiment at near bottom in about 1,600m depth area using quadrature phase shift keying (QPSK) and 8-phase shift keying (8PSK) modulation method. A wideband tilted toroidal beam transducer and a multi-channel combined decision feedback equalizer with 4-hydrophone array were applied for a transmitter and a receiver. Transmission rate of 80 k bit per second (bps) by QPSK was carried out at the transmission range of 840 m, and transmission rate of 120 kbps by 8PSK was carried out at the range of 620 m, using 80 kHz of carrier frequency.
Keywords :
acoustic transducers; decision feedback equalisers; hydrophones; quadrature phase shift keying; radio receivers; radio transmitters; underwater acoustic communication; PSK; QPSK; bit rate 120 kbit/s; bit rate 80 kbit/s; decision feedback equalizer; depth 1600 m; distance 620 m; distance 840 m; frequency 80 kHz; hydrophone array; phase shift keying; quadrature phase shift keying; receiver; sea area experiment; transmitter; underwater acoustic communication; wideband tilted toroidal beam transducer; Phase shift keying; Receivers; Sonar equipment; Transducers; Transmitters; Underwater acoustics;
Conference_Titel :
OCEANS 2010
Conference_Location :
Seattle, WA
Print_ISBN :
978-1-4244-4332-1
DOI :
10.1109/OCEANS.2010.5664308
