Open Access

Guaranteed Performance Region in Fading Orthogonal Space-Time Coded Broadcast Channels

  • Eduard Jorswieck1Email author,
  • Björn Ottersten1,
  • Aydin Sezgin2 and
  • Arogyaswami Paulraj2
EURASIP Journal on Wireless Communications and Networking20082008:268979

DOI: 10.1155/2008/268979

Received: 1 August 2007

Accepted: 15 February 2008

Published: 25 February 2008

Abstract

Recently, the capacity region of the MIMO broadcast channel (BC) was completely characterized and duality between MIMO multiple access channel (MAC) and MIMO BC with perfect channel state information (CSI) at transmitter and receiver was established. In this work, we propose a MIMO BC approach in which only information about the channel norm is available at the base and hence no joint beamforming and dirty paper precoding (DPC) can be applied. However, a certain set of individual performances in terms of MSE or zero-outage rates can be guaranteed at any time by applying an orthogonal space-time block code (OSTBC). The guaranteed MSE region without superposition coding is characterized in closed form and the impact of diversity, fading statistics, and number of transmit antennas and receive antennas is analyzed. Finally, six CSI and precoding scenarios with different levels of CSI and precoding are compared numerically in terms of their guaranteed MSE region. Depending on the long-term SNR, superposition coding as well as successive interference cancellation (SIC) with norm feedback performs better than linear precoding with perfect CSI.

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Authors’ Affiliations

(1)
ACCESS Linnaeus Center, School of Electrical Engineering, KTH - The Royal Institute of Technology
(2)
Information Systems Laboratory, Computer Forum, Department of Electrical Engineering, School of Engineering, Stanford University

Copyright

© Eduard Jorswieck et al. 2008

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.