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Spatial Precoder Design Using Fixed Parameters of MIMO Channels

Summary: Spatial Precoder Design Using Fixed Parameters of
MIMO Channels
Tharaka A. Lamahewa, Rodney A. Kennedy, Thushara D. Abhayapala
Department of Information Engineering, The Australian National University, Canberra ACT 0200, Australia.
{tharaka.lamahewa, rodney.kennedy, thushara.abhayapala}@anu.edu.au
Abstract-- In this paper, we introduced the novel idea of linear
spatial precoding based on fixed and known parameters of a
MIMO channel where antenna spacing and antenna placement
at the transmitter and receiver arrays are considered as fixed
parameters. This precoder reduces the effects of antenna spacing
and antenna placement and improves the performance of space-
time coded MIMO systems. Unlike the previous precoder designs
found in the literature, this precoder does not require frequent
feedback of channel state information (partial or full) from the
receiver. Closed form solutions for the precoder is presented for
systems with up to three receiver antennas. A generalized method
is proposed for more than three receiver antennas. Simulation
results show that at low SNRs, this precoder provides significant
performance improvement over a non-precoded system for small
antenna aperture sizes.


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


Collections: Computer Technologies and Information Sciences