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Telecommunication Systems 24:24, 415436, 2003 2003 Kluwer Academic Publishers. Manufactured in The Netherlands.
 

Summary: Telecommunication Systems 24:24, 415436, 2003
2003 Kluwer Academic Publishers. Manufactured in The Netherlands.
Introducing Space into MIMO Capacity Calculations
TONY S. POLLOCK , THUSHARA D. ABHAYAPALA and RODNEY A. KENNEDY
tony.pollock@anu.edu.au
National ICT Australia, Research School of Information Sciences and Engineering, The Australian
National University, Canberra, ACT 0200, Australia
Abstract. The large spectral efficiencies promised for multiple-input multiple-output (MIMO) wireless
fading channels are derived under certain conditions which do not fully take into account the spatial aspects
of the channel. Spatial correlation, due to limited angular spread or insufficient antenna spacing, signifi-
cantly reduces the performance of MIMO systems. In this paper we explore the effects of spatially selective
channels on the capacity of MIMO systems via a new capacity expression which is more general and re-
alistic than previous expressions. By including spatial information we derive a closed-form expression for
ergodic capacity which uses the physics of signal propagation combined with the statistics of the scattering
environment. This expression gives the capacity of a MIMO system in terms of antenna placement and
scattering environment and leads to valuable insights into the factors determining capacity for a wide range
of scattering models.
Keywords: MIMO systems, wireless, capacity, spatial correlation, multipath channels, non-isotropic scat-
tering
1. Introduction

  

Source: Abhayapala, Thushara D. - Department of Information Engineering, Australian National University

 

Collections: Computer Technologies and Information Sciences