Title :
Low-frequency source for very long-range underwater communication
Author :
Mosca, F. ; Matte, G. ; Mignard, Vincent ; Rioblanc, M.
Author_Institution :
Sonar Syst. Div., iXBlue S.A.S., La Ciotat, France
Abstract :
Long range underwater acoustic communication achievement is a decisive milestone for very long cruising AUVs deployment (>1,000 km). This paper describes a new kind of acoustic source designed and manufactured by iXBlue, the Janus-Hammer Bell (JHB) as shown in Figure 1, which was recently used in the at-sea experiments for long-range communication. The modem center frequency is 500 Hz, and its bandwidth 100 Hz. It provides a 200 dB (ref. 1 μPa @ 1 m) flat signal level spectrum with full immersion capability and is designed to be battery operated. This patented underwater acoustic source was exploited in a “passive time reversal” process. This method newly achieved long range communication at a rate of 100 bit/s at 1,000 km.
Keywords :
acoustic radiators; acoustic transducers; underwater acoustic communication; AUV deployment; JHB; Janus-Hammer Bell; at-sea experiments; bandwidth 100 Hz; bit rate 100 bit/s; distance 1000 km; flat signal level spectrum; frequency 500 Hz; gain 200 dB; iXBlue; low-frequency acoustic source; passive time reversal process; underwater acoustic communication; underwater acoustic source; very long-range underwater communication; Bandwidth; Batteries; Ceramics; Couplings; Transducers; Underwater acoustics; JHB; Janus-Hammer Bell; SOFAR; horizontal wave-guide propagation; long range communication; piezoelectric ceramic stack; ring resonator; time-reversal communication;
Conference_Titel :
Oceans - San Diego, 2013
Conference_Location :
San Diego, CA
