Title :
Discrete multi-tone loading algorithms for underwater acoustic communication
Author :
Saraswathi, K. ; 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 modelled 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 (DMT) 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 :
adaptive modulation; multipath channels; quality of service; radiowave propagation; underwater acoustic communication; wireless channels; Ainslie-McColm model; Thorp model; discrete muititone modulation; discrete multitone loading algorithms; margin adaptive tone loading algorithm; multicarrier modulation schemes; multipath propagation channel; quality-of-service; rate adaptive tone loading algorithm; signal reflections; signal-to-noise ratio profiles; underwater acoustic channel; underwater acoustic communication; Acoustics; Adaptation models; Algorithm design and analysis; Bismuth; Wireless communication; Discrete Multitone(DMT); Marginadaptive(MA); Rateadaptive(RA); Signal-to-Noise Ratio(SNR); underwateracousticcommunication(UWAC);
Conference_Titel :
Advances in Computing, Communications and Informatics (ICACCI, 2014 International Conference on
Conference_Location :
New Delhi
Print_ISBN :
978-1-4799-3078-4
DOI :
10.1109/ICACCI.2014.6968508
