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Diversity and Multiplexing Tradeoff of Spatial Multiplexing MIMO Systems With CSI

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3 Author(s)
Garcia-Ordonez, L. ; Dept. of Signal Theor. & Commun., Tech. Univ. of Catalonia, Barcelona ; Pages-Zamora, A. ; Fonollosa, J.R.

Following the seminal work of Zheng and Tse, this paper investigates the fundamental diversity and multiplexing tradeoff of multiple-input-multiple-output (MIMO) systems in which knowledge of the channel state at both sides of the link is employed to transmit independent data streams through the channel eigenmodes. First, the fundamental diversity and multiplexing tradeoff of each of the individual substreams is obtained and this result is then used to derive a tradeoff optimal scheme for rate allocation along channel eigenmodes. The tradeoff of spatial multiplexing is finally compared to the fundamental tradeoff of the MIMO channel and to the one of both space only codes and V-BLAST which do not require channel state information (CSI) at the transmit side.

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Information Theory, IEEE Transactions on  (Volume:54 ,  Issue: 7 )