  We study a three-node network with a full-duplex base-station communicating
with one uplink and one downlink half-duplex node. In this network, both
self-interference and inter-node interference are present. We use an
antenna-theory-based channel model to study the spatial degrees of freedom of
such network, and study if and how much does spatial isolation outperforms
time-division (i.e. half-duplex) counterpart. Using degrees of freedom
analysis, we show that spatial isolation outperforms time division, unless the
angular spread of the objects that scatters to the intended users is overlapped
by the spread of objects that back scatters to the receivers.
