STUDENT ACADEMIC ACHIEVEMENT
CAPACITY OF 3D HAP-MIMO RADIO CHANNEL IN HIGH ALTITUDE PLATFORMS
MATHEMATICS AND INFORMATION SCIENCES
The study on the development of new technologies in satellite communications is the result of the ever growing demand of users for better quality and higher speeds in broadband services.
The high altitude platforms, (HAPs) are among the innovative technologies of wireless radio, capable of offering wireless communication services and attract the researchers’ attention. The term HAPs defines aerial platforms flying at much lower altitude than that of the satellites, (between 17 and 22km above the Earth’s surface, in the stratosphere) and they have got many economic and technical advantages.
The continuous aim is to maximize the supported capacity and therefore the transmission rates without increasing the bandwidth frequency used.
Satellite communications at a new altitude
THE STUDIED PARAMETERS
The International Telecommunication Union (ITU) has performed frequency bands for use by HAPs, in order for them to be used as Base Station for both 3G and Wi-MAX networks.
In this specific article, the three-dimensional (3-D) radio channel capacity with Space-Time Correlation for Wireless Systems Multiple-Input Multipl-Output in HAPs was studied. More specifically, a model was developed which studied the radio channel capacity achieved with uniform, linear, multi-element antenna arrays when radio channels are related spatially and temporally. Several parameters have been examined, such as the elevation angle of the platform, the antenna array configuration, the three-dimensional (3-D) non-isotropic distribution of the local scatterers and the user mobility.
The aim is to support the links even in urban environments without eye contact between receiver and transmitter in order for transmission techniques to be used which exploit the presence of multipath components in the receiver. This way, the supported capacity and certainly the information transmission rates will be maximized without the increase of bandwidth or transmitted power and at the lowest possible cost.
BEST PAPER AWARD, SPACOMM 2010
The Second International Conference on Advances in Satellite and Space Communications SPACOMM 2010, Athens, Greece
The research work of Emmanouel Michailidis, PhD Candidate, and Athanasios Kanatas, Associate Professor on "On the Capacity of 3-D Space-Time Correlated HAP-MIMO Channels," was awarded with the Best Paper Award, at the 2nd International Conference on Advances in Satellite and Space Communications (SPACOMM) 2010, Athens, Greece.
UNIVERSITY OF PIRAEUS
Department of Digital Systems
Emmanouel Michailidis, PhD Candidate.
Athanasios Kanatas , Associate Professor of the Department of Digital Systems.