tailieunhanh - Báo cáo hóa học: " Research Article On the Duality between MIMO Systems with Distributed Antennas and MIMO Systems with Colocated Antennas"

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 On the Duality between MIMO Systems with Distributed Antennas and MIMO Systems with Colocated Antennas | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2008 Article ID 360490 9 pages doi 2008 360490 Research Article On the Duality between MIMO Systems with Distributed Antennas and MIMO Systems with Colocated Antennas Jan Mietzner1 and Peter A. Hoeher2 1 Communication Theory Group Department of Electrical and Computer Engineering The University of British Columbia 2332 Main Mall Vancouver BC Canada V6T1Z4 2 Information and Coding Theory Lab Faculty of Engineering University of Kiel Kaiserstrasse 2 24143 Kiel Germany Correspondence should be addressed to Jan Mietzner janm@ Received 1 May 2007 Revised 16 August 2007 Accepted 28 October 2007 Recommended by M. Chakraborty Multiple-input multiple-output MIMO systems are known to offer huge advantages over single-antenna systems both with regard to capacity and error performance. Usually quite restrictive assumptions are made in the literature on MIMO systems concerning the spacing of the individual antenna elements. On the one hand it is typically assumed that the antenna elements at transmitter and receiver are colocated that is they belong to some sort of antenna array. On the other hand it is often assumed that the antenna spacings are sufficiently large so as to justify the assumption of uncorrelated fading on the individual transmission links. From numerous publications it is known that spatially correlated links caused by insufficient antenna spacings lead to a loss in capacity and error performance. We show that this is also the case when the individual transmit or receive antennas are spatially distributed on a large scale which is caused by unequal average signal-to-noise ratios SNRs on the individual transmission links. Possible applications include simulcast networks as well as future mobile radio systems with joint transmission or reception strategies. Specifically it is shown that there is a strong duality between MIMO systems with colocated antennas and