Capacity Estimation of the Very Short-Range Electromagnetic Underwater Channel Based on Measurements
The significant attenuation experienced by electromagnetic waves in sea water is the main reason why acoustic waves are generally preferred in underwater communication. Nevertheless, acoustic waves have various drawbacks. For example, they are negatively affected by factors such as mechanical noise...
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | International Journal of Antennas and Propagation |
| Online Access: | http://dx.doi.org/10.1155/2014/318421 |
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| author | Jesús López-Fernández Unai Fernández-Plazaola Jose F. Paris |
| author_facet | Jesús López-Fernández Unai Fernández-Plazaola Jose F. Paris |
| author_sort | Jesús López-Fernández |
| collection | DOAJ |
| description | The significant attenuation experienced by electromagnetic
waves in sea water is the main reason why acoustic
waves are generally preferred in underwater communication.
Nevertheless, acoustic waves have various drawbacks. For example,
they are negatively affected by factors such as mechanical
noise, slow propagation speed, and, particularly, low bandwidth,
which leads to digital links at a lower bit rate. However, in short-range
links, these problems can be overcome by reconsidering
the use of electric current communications. For instance, data
collected by remote-control vehicles in offshore oil and gas and
renewable energy plants can be transmitted at distances of
even 1 m or less. This study uses previous frequency response
measurements taken in deep water to explore the capacity of
a short-range electromagnetic underwater channel. Because of
water movement, the nonstatic position of the vehicle when
the transmission occurs means that the channel is regarded as
randomly time-variant. A statistical model is proposed and the
ergodic capacity is calculated for a 7 MHz bandwidth channel at
distances ranging from 0.5 m to 5 m as well as for different
values of transmitter power. The results of this study reflect
capacity values of tens of kbps at distances of approximately
5 m to several Mbps at distances of less than 1.5 m. |
| format | Article |
| id | doaj-art-a7cb3408dbfc4eddbfeccbc239505766 |
| institution | Kabale University |
| issn | 1687-5869 1687-5877 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Antennas and Propagation |
| spelling | doaj-art-a7cb3408dbfc4eddbfeccbc2395057662025-02-03T01:30:09ZengWileyInternational Journal of Antennas and Propagation1687-58691687-58772014-01-01201410.1155/2014/318421318421Capacity Estimation of the Very Short-Range Electromagnetic Underwater Channel Based on MeasurementsJesús López-Fernández0Unai Fernández-Plazaola1Jose F. Paris2Communications Engineering Department, Malaga University, Campus Teatinos, 29071 Malaga, SpainCommunications Engineering Department, Malaga University, Campus Teatinos, 29071 Malaga, SpainCommunications Engineering Department, Malaga University, Campus Teatinos, 29071 Malaga, SpainThe significant attenuation experienced by electromagnetic waves in sea water is the main reason why acoustic waves are generally preferred in underwater communication. Nevertheless, acoustic waves have various drawbacks. For example, they are negatively affected by factors such as mechanical noise, slow propagation speed, and, particularly, low bandwidth, which leads to digital links at a lower bit rate. However, in short-range links, these problems can be overcome by reconsidering the use of electric current communications. For instance, data collected by remote-control vehicles in offshore oil and gas and renewable energy plants can be transmitted at distances of even 1 m or less. This study uses previous frequency response measurements taken in deep water to explore the capacity of a short-range electromagnetic underwater channel. Because of water movement, the nonstatic position of the vehicle when the transmission occurs means that the channel is regarded as randomly time-variant. A statistical model is proposed and the ergodic capacity is calculated for a 7 MHz bandwidth channel at distances ranging from 0.5 m to 5 m as well as for different values of transmitter power. The results of this study reflect capacity values of tens of kbps at distances of approximately 5 m to several Mbps at distances of less than 1.5 m.http://dx.doi.org/10.1155/2014/318421 |
| spellingShingle | Jesús López-Fernández Unai Fernández-Plazaola Jose F. Paris Capacity Estimation of the Very Short-Range Electromagnetic Underwater Channel Based on Measurements International Journal of Antennas and Propagation |
| title | Capacity Estimation of the Very Short-Range Electromagnetic Underwater Channel Based on Measurements |
| title_full | Capacity Estimation of the Very Short-Range Electromagnetic Underwater Channel Based on Measurements |
| title_fullStr | Capacity Estimation of the Very Short-Range Electromagnetic Underwater Channel Based on Measurements |
| title_full_unstemmed | Capacity Estimation of the Very Short-Range Electromagnetic Underwater Channel Based on Measurements |
| title_short | Capacity Estimation of the Very Short-Range Electromagnetic Underwater Channel Based on Measurements |
| title_sort | capacity estimation of the very short range electromagnetic underwater channel based on measurements |
| url | http://dx.doi.org/10.1155/2014/318421 |
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