  The ergodic spectral efficiency (SE) in interference-limited multiple-input
multiple-output (MIMO) downlink cellular systems is characterized based on
stochastic geometry. A single user is served by using singular value
decomposition precoding and combining. By approximating the expectations of the
channel eigenvalues, we derive upper and lower bounds on the ergodic SE. The
obtained upper bound is the best possible system-level performance of any MIMO
strategy in non-cooperative cellular networks. We validate our analytical
results through simulation. We also conjecture that there exists the optimal
number of streams being proportional to the pathloss exponent.
