We have tried to describe two aspects of MIMO channels: channel capacity
and channel modeling. We have analyzed the channel capacity of static
and fading MIMO channels when the channel side information is available
both at the transmitter and receiver, and when it is available only at
the receiver. We have then modeled the MIMO channel in physical and
angular domains to understand how it provides spatial multiplexing with
the help of degrees of freedom. In physical domain modeling, we have
modeled the MIMO channel in terms of individual physical paths. In
angular domain modeling, we have described the MIMO channel with respect
to fixed spatial basis functions defined by fixed angles that are
determined by the spatial resolution of the antenna arrays. All the
simulations have been performed on MATLAB 7.4.0.287 (R2007a).