Information-Theoretic Analysis of Underwater Acoustic OFDM Systems in Highly Dispersive Channels
This paper investigates the signal-to-interference ratio and the achievable rates of underwater acoustic (UA) OFDM systems over channels where time and frequency dispersion are high enough that (i) neither the transmitter nor the receiver can have a priori knowledge of the channel state information...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2012-01-01
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| Series: | Journal of Electrical and Computer Engineering |
| Online Access: | http://dx.doi.org/10.1155/2012/716720 |
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| author | Francois-Xavier Socheleau Milica Stojanovic Christophe Laot Jean-Michel Passerieux |
| author_facet | Francois-Xavier Socheleau Milica Stojanovic Christophe Laot Jean-Michel Passerieux |
| author_sort | Francois-Xavier Socheleau |
| collection | DOAJ |
| description | This paper investigates the signal-to-interference ratio and the achievable rates of underwater acoustic (UA) OFDM systems over channels where time and frequency dispersion are high enough that (i) neither the transmitter nor the receiver can have a priori knowledge of the channel state information and (ii) intersymbol/intercarrier interference (ISI/ICI) cannot be neglected in the information-theoretic treatment. The goal of this study is to obtain a better understanding of the interplay between interference and the achievable transmission rates. Expressions for these rates take into account the “cross-channels”
established by the ISI/ICI and are based on lower bounds on mutual information that assume independent and identically distributed input data symbols. In agreement with recent statistical analyses of experimental shallow-water data, the channel is modeled as a multivariate Rician fading process with a slowly time-varying mean and with potentially correlated scatterers, which is more general than the common wide-sense stationary uncorrelated scattering model. Numerical assessments on real UA channels with spread factors around 10−1 show that reliable OFDM transmissions at 2 to 4 bits/sec/Hz are achievable provided an average signal-to-noise ratio of 15 to 20 dB. |
| format | Article |
| id | doaj-art-2c4a0289da97437c80f66807c0e5a5a0 |
| institution | Kabale University |
| issn | 2090-0147 2090-0155 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Electrical and Computer Engineering |
| spelling | doaj-art-2c4a0289da97437c80f66807c0e5a5a02025-02-03T06:45:26ZengWileyJournal of Electrical and Computer Engineering2090-01472090-01552012-01-01201210.1155/2012/716720716720Information-Theoretic Analysis of Underwater Acoustic OFDM Systems in Highly Dispersive ChannelsFrancois-Xavier Socheleau0Milica Stojanovic1Christophe Laot2Jean-Michel Passerieux3ENSTA Bretagne, UMR CNRS 6285 Lab-STICC, Université Européenne de Bretagne, 2 rue Francois Verny, 29806 Brest Cedex 9, FranceDepartment of Electrical and Computer Engineering, Northeastern University, Boston, MA 02115, USAInstitut Mines-Télécom, Telecom Bretagne, UMR CNRS 6285 Lab-STICC, Université Européenne de Bretagne, Technopôle Brest Iroise-CS 83818, 29238 Brest Cedex, FranceGeneral Sonar Studies Group, Thales Underwater Systems, 525 route des Dolines, 06903 Sophia Antipolis Cedex, FranceThis paper investigates the signal-to-interference ratio and the achievable rates of underwater acoustic (UA) OFDM systems over channels where time and frequency dispersion are high enough that (i) neither the transmitter nor the receiver can have a priori knowledge of the channel state information and (ii) intersymbol/intercarrier interference (ISI/ICI) cannot be neglected in the information-theoretic treatment. The goal of this study is to obtain a better understanding of the interplay between interference and the achievable transmission rates. Expressions for these rates take into account the “cross-channels” established by the ISI/ICI and are based on lower bounds on mutual information that assume independent and identically distributed input data symbols. In agreement with recent statistical analyses of experimental shallow-water data, the channel is modeled as a multivariate Rician fading process with a slowly time-varying mean and with potentially correlated scatterers, which is more general than the common wide-sense stationary uncorrelated scattering model. Numerical assessments on real UA channels with spread factors around 10−1 show that reliable OFDM transmissions at 2 to 4 bits/sec/Hz are achievable provided an average signal-to-noise ratio of 15 to 20 dB.http://dx.doi.org/10.1155/2012/716720 |
| spellingShingle | Francois-Xavier Socheleau Milica Stojanovic Christophe Laot Jean-Michel Passerieux Information-Theoretic Analysis of Underwater Acoustic OFDM Systems in Highly Dispersive Channels Journal of Electrical and Computer Engineering |
| title | Information-Theoretic Analysis of Underwater Acoustic OFDM Systems in Highly Dispersive Channels |
| title_full | Information-Theoretic Analysis of Underwater Acoustic OFDM Systems in Highly Dispersive Channels |
| title_fullStr | Information-Theoretic Analysis of Underwater Acoustic OFDM Systems in Highly Dispersive Channels |
| title_full_unstemmed | Information-Theoretic Analysis of Underwater Acoustic OFDM Systems in Highly Dispersive Channels |
| title_short | Information-Theoretic Analysis of Underwater Acoustic OFDM Systems in Highly Dispersive Channels |
| title_sort | information theoretic analysis of underwater acoustic ofdm systems in highly dispersive channels |
| url | http://dx.doi.org/10.1155/2012/716720 |
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