On the capacity of cellular systems with MIMO
Rick S. Blum, Jack H. Winters, N.R. Sollenberger · IEEE Communications Letters · 2002
It is shown that the mutual information of a single, isolated, multiple transmit and receive antenna array link is maximized by transmitting the maximum number of independent data streams for a flat Rayleigh fading channel with independent fading coefficients for each path. However, if such links mutually interfere, in some cases the overall system mutual information can be increased by transmitting fewer streams.