Three-Dimensional Spatial Fading Correlation of Uniform Rectangular Array Using Total Power of Angular Distribution

In this letter, we derive a closed-form expression for the spatial fading correlation (SFC) of a uniform rectangular array useful for evaluating correlated-based stochastic models. The underlying concept of the proposed model is that the true distribution of power is relative to the total power of the incident wave and dependent on azimuthal and elevation spreads. Verification is accomplished with the help of computer simulation where excellent agreement is found between theoretical and simulation results. Results support the existing developments that the SFC decreases as the antenna separation or azimuthal spread increases. For performance evaluation, we model the multiple-input-multiple-output channel on the assumption that the coupling matrix of the coupled receiving array differs from the decoupled array. Results highlight the promising potentials of the proposed model with an effective decoupling process. However, we observed that lower estimations of azimuthal spread and elevation spread increase the rate of deterioration in the bit error rate and not antenna spacing.