Investigation of the Effect of Noise Correlations on Diversity Gains and Capacities of Multiport Antennas Using Reverberation Chamber

Xiaoming Chen,Jian Yang

doi:10.1155/2012/486730

Abstract

Most of previous studies on diversity gains and capacities of multiantenna systems assumed independent and identically distributed (i.i.d.) Gaussian noises. There are a few studies about the noise correlation effects on diversity gains or MIMO capacities, however, by simulations only. In this paper, the maximum ratio combining (MRC) diversity gain and multiple-input multiple-output (MIMO) capacity including correlated noises are presented. Based on the derived formulas, measurements in a reverberation chamber are performed for the first time to observe the effect of noise correlations on diversity gains and MIMO capacities.

Highlights

Diversity techniques are used to mitigate fading effects in wireless multipath environments to offer better communication reliability; the multiple-input multiple-output (MIMO) multiplexing, on the other hand, makes use of the scattering property to provide higher communication data rates
This paper focuses on the maximum ratio combining (MRC) diversity gain and the ergodic MIMO capacity
MRC diversity gains and MIMO capacities of multiport antennas have been measured in real-life multipath environments [1,2,3,4]

Summary

Introduction

Diversity techniques are used to mitigate fading effects in wireless multipath environments to offer better communication reliability; the multiple-input multiple-output (MIMO) multiplexing, on the other hand, makes use of the scattering property to provide higher communication data rates. Since both the (spatial) diversity and multiplexing in mobile communications involve multiport antennas, the diversity gain and ergodic MIMO capacity become two common parameters for characterization of multiport antennas. MRC diversity gains and MIMO capacities of multiport antennas have been measured in real-life (outdoor and indoor) multipath environments [1,2,3,4]. A reverberation chamber is basically a large metal cavity with mode-stirrers inside to create a Rayleigh-fading environment [15]

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