  This paper focuses at the investigation of the degree of orthogonality of
channels of multiple users in densely populated indoor and outdoor scenarios.
For this purpose, a statistical millimeter wave (mmwave) MIMO channel simulator
is carefully designed using state of the art channel models. At the mmwave
frequencies, human/vehicular mobility around the mobile users may partially or
completely block the communication link. This give rise to the consideration of
new channel modeling parameter i.e. probability of a user to be in LOS
dynamics. Higher line of sight (LOS) probabilities may increase the spatial
correlation among the multiuser channels. Therefore, quantification of the
spatial separation of users in different scenarios with distinct LOS
probabilities is crucial and it is the subject of investigation of this paper.
Additionally, the mutual orthogonality of channels by changing the number of
base station (BS) antennas and inter antenna element distance (IED) have also
been investigated. Analysis shows that LOS blockage of certain scenario has
more impact at the degree of orthogonality among users as compared to the
number of BS antennas and the spacing between the antenna elements.
