High-altitude platforms for wireless communications

Tozer, T.C.; Grace, David

doi:10.1049/ecej:20010303

Cited by 333 publications

(157 citation statements)

References 2 publications

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“…The radius of a HAP's footprint can be up to 100 kilometers, depending on its altitude and elevation angle. With a 50-MHz bandwidth at 28-GHz frequency, a HAP at a height of 10 km above the ground can provide downlink date rates up to 320 Mbps [26]. HAPs are particularly suitable for large water areas near a coastline such as 200-nautical-mile exclusive economic zones, and can be used in the following scenarios to provide marine Internet services:…”

Section: High Altitude Platformsmentioning

confidence: 99%

“…The major advantages of HAPs over satellites include easy and fast deployment, low cost and large capacity with shorter propagation delay [26]. In comparison with a WANET, an HAP can cover much larger areas with more reliable network performance; but their deployment and power supply are more difficult to handle.…”

Section: High Altitude Platformsmentioning

confidence: 99%

“…As discussed in Ref. [26], one major challenge is the overall long-term power balance. Relatively mild wind and turbulence in the stratosphere need power for propulsion and station-keeping.…”

Section: High Altitude Platformsmentioning

confidence: 99%

See 2 more Smart Citations

A Possible Development of Marine Internet: A Large Scale Cooperative Heterogeneous Wireless Network

Jiang¹,

Chen²

2015

JCC

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Today, terrestrial Internet can be easily accessed with various types of terminals almost anytime and anywhere on the land. But this is not yet the case in the ocean mainly due to huge differences between terrestrial and marine environments. Although satellite Internet services are available in marine environments, at the time-being, they are neither cost-effective nor popular due to their inherent weaknesses in construction, launching and operation. Ever-increasing human activities in the ocean require marine Internet to provide handy, reliable and cost-effective high-speed Internet access not only on surface but also underwater in marine environments. This is due to the fact that a huge number of sensors and things have been deployed underwater, and this number is still increasing. How to interconnect them becomes an important issue that is necessarily addressed in order to form large and sophisticated underwater systems. This paper discusses the major available network technologies and new networking approaches that can be used to develop marine Internet, particularly a large scale cooperative heterogeneous wireless network, along with some further research issues.

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Section: High Altitude Platformsmentioning

confidence: 99%

Section: High Altitude Platformsmentioning

confidence: 99%

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A Possible Development of Marine Internet: A Large Scale Cooperative Heterogeneous Wireless Network

Jiang¹,

Chen²

2015

JCC

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“…The flat of perpendicular movement of HAPS could be analyzed and covered in term of carrier to interference level as in [7]. Productivity of HAPS can be determined according to the directivity of the antenna array, However, the antennas should be directly connected to the earth station with a minimum frozenly zoon [8]. So, rotation and horizontal and vertical displacements are the main area of concern.As in the stratospheric region wind is a strong reason for deviation of the aerial platform, this was taken into account, along with rotational movement, in the study to find out the issues on whether the platform can provide reliable services without temporal outages.…”

Section: Introductionmentioning

confidence: 99%

Stratospheric Winds and Rain Effect on HAPS Backhaul Link Performance

Abdulrazak

2017

KJAR

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“…The applica− tion areas of tethered balloons change with different pay− loads hung below them. For example, tethered balloons equipped with various radar systems have been used for airborne early warning [2], tethered balloon equipped with a communication base station has been used for communications and television relay [3,4], tethered bal− loon equipped with navigation equipments can be used to increase the accuracy of navigation combined with the geosynchronous satellite, which can also become a new independent network of regional navigation system [5]. The optoelectronic imaging platform of tethered balloon mentioned in this paper is similar to the airborne opto− electronic imaging platform.…”

Section: Introductionmentioning

confidence: 99%

Tracking technology for optoelectronic imaging platform of tethered balloon based on DGPS/INS

Wang¹,

Wang

Zhou

et al. 2011

Opto-Electronics Review

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In this paper, a tracking method for optoelectronic imaging platform of tethered balloon based on difference global positioning system/inertial navigation system is presented in detail. The location and attitude information of optoelectronic imaging platform, the azimuth and elevation angles of camera’s line of sight are used by this method to locate the ground target at the centre point of the camera’s field of view through corresponding coordinate transformation. And then, the method makes use of the update position and attitude information to solve the theoretical point of camera’s line of sight inversely. Finally, an angle control commend will be sent to the inertially-stabilized turntable on the optoelectronic imaging platform, which will adjust its azimuth and elevation angle to make the camera’s line of sight to the ground target. A lot of experiments are conducted, and the results show that the initial ground target is always in the centre of camera’s field of view no matter how the balloon’s position and attitude change, and the new location data of ground target has little difference with the initial location data, while the difference between them is close to 0.

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High-altitude platforms for wireless communications

Cited by 333 publications

References 2 publications

A Possible Development of Marine Internet: A Large Scale Cooperative Heterogeneous Wireless Network

A Possible Development of Marine Internet: A Large Scale Cooperative Heterogeneous Wireless Network

Stratospheric Winds and Rain Effect on HAPS Backhaul Link Performance

Tracking technology for optoelectronic imaging platform of tethered balloon based on DGPS/INS

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