A theoretical path design for long range over ocean microwave

Kerans, Andrew; Kulessa, Andy; Woods, G.S.; Clark, Ashley

doi:10.1109/oceanssyd.2010.5603879

Cited by 2 publications

(3 citation statements)

References 2 publications

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“…Some areas in the temperate zone (Black sea, Baltic sea, the British Channel, East Anglia) are also prone to anomalous propagation. This with the above achievements in characterizing the radio propagation in the marine atmosphere has led to the idea of taking advantage of the tropospheric ducting mechanism to maintain efficient coastal communications links [20][21][22][23]. To the best of the author's knowledge, the first ever reported use of the evaporation duct for communications purposes is the 78-km experimental link operating at a frequency of 10.6 GHz and providing a data rate of 10 Mb/s which has been established from the Australian mainland to the Great Barrier Reef (GBR), North Queensland, Australia [20].…”

Section: Introductionmentioning

confidence: 99%

“…To the best of the author's knowledge, the first ever reported use of the evaporation duct for communications purposes is the 78-km experimental link operating at a frequency of 10.6 GHz and providing a data rate of 10 Mb/s which has been established from the Australian mainland to the Great Barrier Reef (GBR), North Queensland, Australia [20]. In [21] a critical overview of the link described in [20] is made. Papers [22], [23] describe an experimental 64 km setup made on the East coast of Malaysia.…”

Section: Introductionmentioning

confidence: 99%

“…Papers [22], [23] describe an experimental 64 km setup made on the East coast of Malaysia. To design the link and assess link budget in [20][21][22][23] the PE method is proposed and used. Those experimental and theoretical investigations have shown that the evaporation duct, especially in the specifically studied areas, is capable of sustaining a high data rate microwave link over non-line-of-site ranges.…”

Section: Introductionmentioning

confidence: 99%

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Anomalous tropospheric propagation: Usage possibilities and limitations in radar and wireless communications systems

Sirkova¹

2019

AIP Conference Proceedings

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The anomalous tropospheric propagation due to extreme superrefraction of radio waves (known also as ducting) has significant influence on radar and communication systems working in microwave range. Up to the last decade tropospheric ducting has been considered rather an unwanted phenomenon as it causes multipath propagation (with all related impairments on communications systems), missed target detection for radars, unexpected interference between different microwave systems working in the same range, etc. The tropospheric ducting mechanism is more typical for coastal and maritime areas than over land. On the other hand, the coastal and maritime areas are known to cause difficulties in planning and designing of the communications links due to the high environmental variability there. During the last years, the development of accurate operational propagation prediction/assessment models and the increasing improvement in meteorological data collection and environmental models gave rise to the idea of making use of the most common effect of ducting, namely, the long-range radio waves propagation leading to signal enhancement near and beyond the radio horizon. This paper aims at outlining the state, achievements and limitations in the usage of tropospheric ducting mechanism to maintain efficient coastal communications links. Reliability of such links from physical layer point of view, advantages and disadvantages of operational propagation and environmental models will be discussed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Anomalous tropospheric propagation: Usage possibilities and limitations in radar and wireless communications systems

Sirkova¹

2019

AIP Conference Proceedings

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Unmanned aerial vehicle as communication relay for autonomous underwater vehicle — Field tests

Johansen

Zolich

Hansen

et al. 2014

2014 IEEE Globecom Workshops (GC Wkshps)

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Abstract-This paper describes field experiments with an X8 Unmanned Aerial Vehicle (UAV) operating as a wireless communication relay while loitering over a REMUS 100 Autonomous Underwater Vehicle (AUV) being at the ocean surface. The paper describes the design of the communication relay payload, network configuration, optimal flight conditions and UAV antenna mounting, and experimental results. Experiments were conducted under less than ideal conditions with rain and turbulent winds leading to unfavorable roll and pitch motions of the UAV, and small waves surrounding the AUV. The results with data download from the AUV through the UAV communication relay to a ground station shows that at the tested (typical) flight conditions the distance and attitude between the AUV and UAV are not the bottlenecks in the communication network. The main bottleneck was identified as the capacity of the proprietary wireless system on the REMUS 100 AUV which was not specified as a high capacity data link, and seems to be set up by the AUV system manufacturer to provide a relatively low capacity, but very robust, wireless data link regardless of signal strength and quality.

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A theoretical path design for long range over ocean microwave

Cited by 2 publications

References 2 publications

Anomalous tropospheric propagation: Usage possibilities and limitations in radar and wireless communications systems

Anomalous tropospheric propagation: Usage possibilities and limitations in radar and wireless communications systems

Unmanned aerial vehicle as communication relay for autonomous underwater vehicle — Field tests

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