TAILIEUCHUNG - Báo cáo hóa học: " Research Article Guaranteed Performance Region in Fading Orthogonal Space-Time Coded Broadcast Channels"

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 Guaranteed Performance Region in Fading Orthogonal Space-Time Coded Broadcast Channels | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2008 Article ID 268979 12 pages doi 2008 268979 Research Article Guaranteed Performance Region in Fading Orthogonal Space-Time Coded Broadcast Channels Eduard Jorswieck 1 Bjorn Ottersten 1 Aydin Sezgin 2 and Arogyaswami Paulraj2 1 ACCESS Linnaeus Center School of Electrical Engineering KTH - The Royal Institute of Technology 10044 Stockholm Sweden 2 Information Systems Laboratory Computer Forum Department of Electrical Engineering School of Engineering Stanford University CA 94305-9510 USA Correspondence should be addressed to Eduard Jorswieck Received 1 August 2007 Accepted 15 February 2008 Recommended by Nihar Jindal Recently the capacity region of the MIMO broadcast channel BC was completely characterized and duality between MIMO multiple access channel MAC and MIMO BC with perfect channel state information CSI at transmitter and receiver was established. In this work we propose a MIMO BC approach in which only information about the channel norm is available at the base and hence no joint beamforming and dirty paper precoding DPC can be applied. However a certain set of individual performances in terms of MSE or zero-outage rates can be guaranteed at any time by applying an orthogonal space-time block code OSTBC . The guaranteed MSE region without superposition coding is characterized in closed form and the impact of diversity fading statistics and number of transmit antennas and receive antennas is analyzed. Finally six CSI and precoding scenarios with different levels of CSI and precoding are compared numerically in terms of their guaranteed MSE region. Depending on the longterm SNR superposition coding as well as successive interference cancellation SIC with norm feedback performs better than linear precoding with perfect CSI. Copyright 2008 Eduard Jorswieck et al. This is an open access article distributed under the Creative .

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