tailieunhanh - Báo cáo hóa học: " Research Article Investigations in Satellite MIMO Channel Modeling: Accent on Polarization"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Investigations in Satellite MIMO Channel Modeling: Accent on Polarization | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2007 Article ID 98942 10 pages doi 2007 98942 Research Article Investigations in Satellite MIMO Channel Modeling Accent on Polarization Peter Horvath 1 George K. Karagiannidis 2 Peter R. King 3 Stavros Stavrou 3 and Istvan Frigyes1 1 Department of Broadband Infocommunications and Electromagnetic Theory Budapest University of Technology and Economics H-1111 Budapest Hungary 2 Division of Telecommunications Department of Electrical and Computer Engineering Aristotle University of Thessaloniki 54124 Thessaloniki Greece 3 Centre for Communication Systems Research University of Surrey Guildford Surrey GU2 7XH UK Received 30 September 2006 Accepted 19 March 2007 Recommended by Ray E. Sheriff Due to the much different environment in satellite and terrestrial links possibilities in and design of MIMO systems are rather different as well. After pointing out these differences and problems arising from them two MIMO designs are shown rather well adapted to satellite link characteristics. Cooperative diversity seems to be applicable its concept is briefly presented without a detailed discussion leaving solving particular satellite problems to later work. On the other hand a detailed discussion of polarization time-coded diversity PTC is given. A physical-statistical model for dual-polarized satellite links is presented together with measuring results validating the model. The concept of 3D polarization is presented as well as briefly describing compact 3D-polarized antennas known from the literature and applicable in satellite links. A synthetic satellite-to-indoor link is constructed and its electromagnetic behavior is simulated via the FDTD finite-difference time-domain method. Previous result of the authors states that in 3D-PTC situations MIMO capacity can be about two times higher than SIMO single-input multiple-output capacity while a diversity gain of nearly 2 X 3 is

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