Volume 12, Number 5/6

Performance Analysis of Spatially Correlated Cylindrical Antenna Array for 3D Massive MIMO

  Authors

Patrick Danuor¹ and Emmanuel Ampoma Affum², ¹Ho Technical University, Ghana, ²Kwame Nkrumah University of Science and Technology, Ghana

  Abstract

The spectral efficiency of three-dimensional (3D) massive MIMO is impaired due to the spatial correlation (SC) between closed-spaced elements of antenna arrays (AAs). This paper investigates the impacts of arbitrary Q-power variations of the Power Cosine distribution for a precise characterization of the SC. This is done by presenting mathematical expressions characterizing the SC of cylindrical antenna array (CAA) regarding Student's -t, Von Mises and Cosine distributions, for the direction of arrival (DoA) of the electromagnetic waves impinging on the receiving antenna. Unlike the Student's -t and Von Mises distribution, our outcome recorded huge mismatch between theoretical and simulation correlation coefficients for arbitrary Q-power values above ten (10) which also reduced the downlink channel capacity. The practical relevance is that even though higher Q-power values are the key parameters for system performance, meticulous selection of arbitrary Q-power values above ten (10) is essential to minimize errors regarding channel modelling.

  Keywords

Antenna Arrays, Spatial Correlation, Uplink Capacity, Massive MIMO.