On the Joint Effects of HPA Nonlinearities and IQ Imbalance on Mixed RF/FSO Cooperative Systems

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 apertures selection combining. system also relay operating at amplify-and-forward mode. RF channels are subject to Nakagami-m fading optical links experience Málaga distribution. addition, introduce impairments receiver. fact, impaired by High Power Amplifier (HPA) nonlinearities receiver suffers from phase Quadrature Imbalance. Moreover, assume two types HPA called Soft Envelope Limiter (SEL) Traveling Tube (TWTA). Closed-forms outage probability, bit error ergodic capacity derived. Capitalizing on these performances, derive high SNR asymptotes unpack insightful metrics such as diversity gain. We address impacts some key factors performance impairments, interferers, number pointing errors, etc. Finally, analytical expressions confirmed Monte Carlo simulation.