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OF THE DISSERTATION ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING BASED AIR INTERFACES AND MULTIPLE INPUT MULTIPLE OUTPUT TECHNIQUES IN COOPERATIVE SATELLITE COMMUNICATIONS FOR 4 GENERATION MOBILE SYSTEMS by Yuri Labrador Florida International University, 2009 Miami, Florida Professor Niki Pissinou, Major Professor Recently, wireless network technology has grown at such a pace that scientific research has become a practical reality in a very short time span. Mobile wireless communications have witnessed the adoption of several generations, each of them complementing and improving the former. One mobile system that features high data rates and open network architecture is 4G. Currently, the research community and industry, in the field of wireless networks, are working on possible choices for solutions in the 4G system. 4G is a collection of technologies and standards that will allow a range of ubiquitous computing and wireless communication architectures. The researcher considers one of the most important characteristics of future 4G mobile systems the ability to guarantee reliable communications from 100 Mbps, in high mobility links, to as high as 1 Gbps for low mobility users, in addition to high efficiency in the spectrum usage.

Orthogonal Frequency Division Multiplexing Based Air Interfaces and Multiple Input Multiple Output Techniques in Cooperative Satellite Communications for 4th Generation Mobile Systems