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In this paper, the issues in wireless resource management in multiuser multiple input multiple output (MIMO) systems are addressed. In particular, we investigate the problems in the design of user scheduling algorithms based on spatial division multiple access (SDMA). We review the existing scheduling algorithms optimized for single input single output (SISO) multiuser systems and point out their...
Multiple-input multiple-output (MIMO) technology, which makes use of the spatial dimension by utilising multiple antennas at the transmitter and receiver, has proved an efficient solution for providing higher data throughput and/or link reliability in wireless systems. In this study, the authors investigate a virtual MIMO (V-MIMO) technique, based on a constellation of multiple high-altitude platforms...
High altitude platforms (HAPs) equipped with communications payload support incremental deployment of the network. This can be exploited in a fixed user operating environment to increase the system capacity through the use of multiple high altitude platforms (HAPs) serving the same coverage area. The performance of such a system in real operating environment depends heavily on the propagation channel...
High altitude platform (HAP) system offers establishment of communication links with predominantly line-of-sight (LOS) conditions due to high elevation angles. However, in mobile scenario, the transmitted signal is still subject to blocking due to obstacles between HAP and the user, which increases the probability of link outage. In the light of this, multiple HAP constellations with overlapped coverage...
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