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Impairments baseband model in-phase and quadrature-phase Imbalance (IQI) andResidual hardware impairments (RHI) are two key factors degrading theperformance of wireless communication systems (WCSs), particularly whenhigh-frequency bands are employed, as in 5G systems and beyond. The impact ofeither IQI or RHI on the performance of various WCSs has been investigatedexclusively in a separate way. To fill this gap, in this paper, the jointeffect of both IQI and RHI on the performance of a WCS subject to the sum ofFox's H-function fading model (SFHF) is investigated. Such a fading modelgeneralizes most, if not all, of well-known fading and turbulence models. Tothis end, closed-form and asymptotic expressions for the outage probability(OP), channel capacity (CC) under constant power with optimum rate adaptation(ORA) policy, and average symbol error probability (ASEP) for both coherent andnon-coherent modulation schemes. Specifically, all the analytical expressionsare derived for three different scenarios: (i) ideal Tx and Rx impaired, (ii)Tx impaired and ideal Rx, and (iii) both Tx and Rx are impaired. Further,asymptotic expressions for OP, CC under ORA policy, and ASEP are obtained,based on which, insightful discussions on the IQI and RHI impacts are made.Alpha-mu and Malaga M turbulence with pointing error distribution models havebeen considered particular SFHF distribution cases. The analytical derivations,revealed by simulation results, demonstrate that the RF impairments' effectsshould be seriously taken into account in the design of next-generationwireless technologies.

Performance Analysis of I/Q Imbalance with Hardware Impairments over Fox's H-Fading Channels