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Achieving Maximum Capacity from a Fixed Region Tharaka A. Lamahewa, Tony S. Pollock , Thushara D. Abhayapala

Summary: Achieving Maximum Capacity from a Fixed Region
of Space
Tharaka A. Lamahewa, Tony S. Pollock , Thushara D. Abhayapala
Department of Information Engineering, The Australian National University, Canberra ACT 0200, Australia
and National ICT Australia, Locked Bag 8001, Canberra, ACT 2601, Australia.
{tharaka.lamahewa, thushara.abhayapala}@anu.edu.au, tony.pollock@nicta.com.au
Abstract-- Previous results have shown channel capacity of
multiple-antenna array communication systems linearly scales
with the number of antennas. In reality, by increasing the
number of antennas within a fixed region of space the antenna
array become dense and spatial correlation (non-ideal antenna
placement) significantly limits the capacity. In this paper, we
derive a spatial precoder which eliminates the effects of non-
ideal antenna placement on the capacity performance of spatially
constrained dense MIMO systems. The precoder is derived based
on fixed and known parameters of MIMO channels, namely the
antenna spacing and antenna placement which are known at the
transmitter. Therefore, with this design, the precoder is fixed for
fixed antenna placement and the transmitter does not require
any feedback of channel state information (partial or full) from


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


Collections: Computer Technologies and Information Sciences