Performance of MIMO with Circular Antenna Array Using Correlation Matrix

Abstract

Spatial correlation is one of the impairment practical Multiple-Input Multiple-Output (MIMO) wireless communication systems have to be coped with. Capacity increases promised by MIMO systems mostly depend on the spatial correlation properties of the radio channels. This paper investigates the connection between these properties and the channel capacity. By investigating the channel capacity using the correlation matrix for a circular array, we prove that, for circular array, decrease in the radius is equivalent to decrease in signal to noise ratio (SNR).