Title :
Rate reach profile and tone loading algorithms for underwater acoustic communication
Author :
Saraswathi, K. ; Gadakari, Niraj B. ; Abitha, B. ; Ravishankar, S.
Author_Institution :
Dept. of ECE, R.V. Coll. of Eng., Bangalore, India
Abstract :
Underwater acoustic (UWA) channel is characterized as a severe multipath propagation channel due to signal reflections from the surface and bottom of the sea, that is affected by a variety of ambient noise profiles unique to underwater environment. Further the motion of water introduces a Doppler. Multicarrier modulation schemes can be adapted to meet a given Quality of service (QOS) in such environments. In this paper the underwater acoustic channel is studied using the Thorp and Ainslie-McColm models for absorption and their limitations are analyzed. Signal to noise ratio (SNR) profiles at various distances employing Discrete Multitone Modulation are obtained considering different types of ambient noise sources such as shipping, wind, thermal, bubble and turbulence. To meet the QOS different Rate Adaptive and Margin Adaptive Tone loading algorithms are simulated and compared based on system margin, utilizing these SNR profiles.
Keywords :
acoustic noise; acoustic signal processing; acoustic wave absorption; adaptive modulation; quality of service; underwater acoustic communication; underwater acoustic propagation; Ainslie-McColm model; Doppler water motion; QoS; SNR profile; Thorp model; UWA channel; absorption; ambient noise profile; bubble noise sources; discrete multitone modulation; margin adaptive tone loading algorithm; multicarrier modulation scheme; multipath propagation channel; quality of service; rate adaptive tone loading algorithm; rate reach profile; shipping noise source; signal reflection; signal to noise ratio profile; thermal noise source; turbulence noise source; underwater acoustic channel; underwater acoustic communication; underwater environment; wind noise source; Absorption; Attenuation; Loading; Signal to noise ratio; Underwater acoustics; DMT; Frequency selective; Margin adaptive; Rate adaptive; SNR; Underwater acoustic communication;
Conference_Titel :
Wireless and Optical Communications Networks (WOCN), 2014 Eleventh International Conference on
Conference_Location :
Vijayawada
Print_ISBN :
978-1-4799-3155-2
DOI :
10.1109/WOCN.2014.6923069
