  In this work, we provide a framework analysis of dual-hop hybrid Millimeter
Wave Radio Frequency (RF)/Free Space Optical (FSO) MIMO relaying system. The
source is equipped with multiple antennas and employs conjugate beamforming
while the destination consists of multiple apertures with selection combining.
The system also consists of a relay operating at amplify-and-forward mode. The
RF channels are subject to Nakagami-m fading while the optical links experience
the M\'alaga distribution. In addition, we introduce the impairments to the
relay and receiver. In fact, the relay is impaired by the High Power Amplifier
(HPA) nonlinearities while the receiver suffers from the In phase and
Quadrature Imbalance. Moreover, we assume two types of HPA nonlinearities
impairments called Soft Envelope Limiter (SEL) and Traveling Wave Tube
Amplifier (TWTA). Closed-forms of the outage probability, the bit error
probability, and the ergodic capacity are derived. Capitalizing on these
performances, we derive the high SNR asymptotes to unpack insightful metrics
such as the diversity gain. We also address the impacts of some key factors on
the system performance such as the impairments, the interferers, the number of
antennas and apertures and the pointing errors, etc. Finally, the analytical
expressions are confirmed by Monte Carlo simulation.
