Title :
Effect of near-surface bubble plumes on the acoustic signal used in UWACNs
Author :
Mandal, Ashis Kumar ; Misra, Sudip ; Dash, Mihir Kumar
Author_Institution :
Sch. of Inf. Technol. & Centre for Oceans, Indian Inst. of Technol., Kharagpur, Kharagpur, India
Abstract :
Shallow water environments exhibit significantly prominent spatio-temporal variability; compared to the ones corresponding to deep oceans. An acoustic signal propagating through a shallow water region faces multiple reflections with the ocean surface as well as with the ocean bottom. So, rendering wireless acoustic communication in such type of unpredictable environment is challenging, as the acoustic signal is subjected to different losses such as multipath fading and absorption. In this paper, we analyze the near ocean surface anomalous behavior of acoustic signals, typically observed in Underwater Wireless Acoustic Communication Networks (UWACNs), due to damping in the presence of sub-surface bubble plumes. Bubbles have profound impact on the acoustical properties in the oceanic environment. The injection of bubble plumes near ocean surface renders the subsurface acoustic signal to behave anomalously.
Keywords :
acoustic signal processing; bubbles; electromagnetic wave absorption; oceanographic regions; oceanographic techniques; seawater; underwater acoustic communication; underwater acoustic propagation; UWACN; absorption; acoustic signal propagation; acoustical properties; deep oceans; multipath fading; near ocean surface anomalous behavior; near-surface bubble plumes; ocean bottom; oceanic environment; shallow water environments; shallow water region; spatio-temporal variability; subsurface acoustic signal; subsurface bubble plumes; underwater wireless acoustic communication networks; Acoustics; Damping; Electromagnetic waveguides; Equations; Mathematical model; Sea surface; Shallow-water; acoustic network; acoustics signal; bubble plumes; multipath-reflection;
Conference_Titel :
Wireless Communications and Mobile Computing Conference (IWCMC), 2013 9th International
Conference_Location :
Sardinia
Print_ISBN :
978-1-4673-2479-3
DOI :
10.1109/IWCMC.2013.6583832