On the Capacity of Distributed MIMO Systems

摘要

The predicted enormous capacity potential of multiple-inputrnmultiple-output (MIMO) systems is significantly limited by realisticrnoutdoor propagation environments. In this paper, we investigate arngeneralized paradigm for multiple-antenna communications, calledrndistributed MIMO (D-MIMO), which can address the problems inherentrnin conventional co-located MIMO (C-MIMO) systems. A comprehensivernthree-stage model encompassing the effects of spatial correlation andrnlarge-scale fading is introduced, which includes many prevalent C-MIMOrnmodels in literature as well as our proposed D-MIMO as special cases.rnBased on this model, both the dimension gain (due to channel rankrnimprovement) and the power gain (due to macrodiversity) of D-MIMOrnover C-MIMO in capacity are addressed and verified.