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In this paper, the authors consider Multiple-Input Multiple-Output (MIMO) Maximal Ratio Combining (MRC) systems and assess the system performance in terms of average Symbol Error Probability (SEP), outage probability and ergodic capacity in double-correlated Rayleigh-and-Lognormal fading channels. In order to derive the receive and transmit correlation functions needed for the performance analysis, a Three-Dimensional (3D) MIMO Mobile-to-Mobile (M-to-M) channel model, which takes into account the effects of fast fading and shadowing is used. Numerical results are provided to show the effects of system parameters, such as maximum elevation angle of scatterers, orientation angle of antenna array in the x-y plane, angle between x-y plane and the antenna array orientation, and degree of scattering in the x-y plane, on the system performance.
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