The High Altitude Platform System
Cosine Alpha Tapered Beamforming Window for Uniform Concentric Circular Array using in High Altitude Platform System
... antenna system in HAPs by estimating the position of the wanted location, modify and steering the radiation pattern of the array antenna towered the wanted ...
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Performance Evaluation of WiMAX Broadband from High Altitude Platform Cellular System and Terrestrial Coexistence Capability
... cellular system in the ...WiMAX system based on the typical WiMAX terrestrial ...broadband system performance of indi- vidual HAP system was evaluated both separately and when taking into ...
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Effect of lateral displacement of a high-altitude platform on cellular interference and handover
... the platform, and this has been highlighted by a number of aeronautical programs based on airship- and aircraft-type platforms ...munications system performance have yet to be examined in ...for ...
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Downlink Coexistence Performance Assessment and Techniques for WiMAX Services from High Altitude Platform and Terrestrial Deployments
... A cumulative distribution function (CDF) of CNR with di ff erent antenna patterns is shown in Figure 2. This figure represents the CNR performance achieved from adopting isotropic and directive antenna patterns, ...
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Optimizing an array of antennas for cellular coverage from a high altitude platform
... of high altitude platforms (HAPs) [1]–[7], which operate in the stratosphere, at an altitude of 17—22 ...overall system capacity, with cells served by a number of antenna spot beams from the ...
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Multi beam coverage and beamforming technology for high altitude platform station communication system
... Multi-beam antenna technology has an automatic adap- tive beam steering function, which actually concentrates the transmit power in other directions to the main beam direction for directional transmission. Therefore, ...
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WCDMA Uplink Interference Assessment from Multiple High Altitude Platform Configurations
... multiple high altitude platform (HAP) coverage of a common cell area using a wideband code division multiple access (WCDMA) ...uplink system performance of the ...
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Improving the system capacity of broadband services using multiple high-altitude platforms
... of high-altitude platform (HAP) communications networks oper- ating in the millimeter-wave bands is ...The system capacity of such constellations is critically affected by the min- imum ...
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Application of Single Mode Fiber Coupled Receivers in Optical Satellite to High Altitude Platform Communications
... the high-altitude ...Typical system parameter values used for the calculations in the following sections (assum- ing the HAP to be positioned in Central Europe) are given in Table ...
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A Novel Technique to improve the Performance of Wireless Sensor Network using Adaptive Antennas and High Altitude Platform Communications
... the system performance we can rely on the bit energy-to- noise power spectral density which is a main parameter affecting the probability of error in the system according to the modulation scheme ...
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Handoff Study of Ring Shaped Cellular Configuration Designed for High Altitude Platform Communications
... HAPs may experience different types of movements, the drift movements with respect to x, y, and z-axis and the rotational movements with respect to x, y, and z-axis known as pitch, roll, and yaw respectively. Only the ...
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Performance of CDMA power control for HAPS
... of high altitude platform have been analyzed in ...Moreover, system capacity in term of the number of user per cell has been shown for each of the movement ...
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A Novel Technique to Improve the Performance of Wireless Sensor Network using Adaptive Antennas and High Altitude Platform
... of high-altitude ...this system can be improved by improving the quality of link between the sink and the sensor nodes using concentric circular ...
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Forward link power control for high altitude platform station w-cdma system
... providing high bit rates at low ...required system capacity and cost ...a system that includes all existing and emerging fixed and mobile networks, including ...
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System design of the physical layer for Loon’s high altitude platform
... Research has shown that achieving diversity at the UE for frequencies below 1 GHz is difficult. For example, [30] say that, in general, two linearly polarized antennas, located orthogonal to each other, provide ...
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Co-channel interference studies between high altitude platform and terrestrial system in Malaysia
... High Altitude Platform Station (HAPS) technology is a new technology that can perform the tasks currently handled terrestrial and satellite ...The high altitude platform station ...
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Testing method and distribution characteristics of spatial pesticide spraying deposition quality balance for unmanned aerial vehicle
... and altitude via the combination of high-accuracy BeiDou navigation satellite system (BNSS) and UAV platform and compare the data of flight parameters from airborne GPS in order to realize ...
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1. An improvised scattering study for elevation reliant on 3g communications through high altitude platform (hap)
... HAP system model has designed intending to provide 3G services with certain gain distribution over a coverage ...The system model also used to seek relation among parameters like elevation angle at L-EoC, ...
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A WiMAX Payload for High Altitude Platform Experimental Trials
... Various system options were considered such as whether to modularise the payload subsystems into separate pressurised containers, whether to use steered or nonsteered WiMAX antennas, whether to use additional ...
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Sun-tracking System Design for Parabolic Dish Solar Concentrator
... Considering that the apparent movement of the sun has a very slow speed – ranging from 0.23º/min to 1.40º/min – and the high accuracy required, stepper motors where chosen to drive the system. Discrete ...
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