EURASIP Journal on Wireless Communications and Networking, special issue on Radio Resource Management in 3G+ Systems, vol. 2006, special issue no. 6, 8 pages, Article Id 16281, May 2006.

Space-Time Water-filling for Composite MIMO Fading Channels

Zukang Shen, Robert W. Heath, Jr., Jeff Andrews, and Brian L. Evans

Wireless Networking and Communications Group, Dept. of Electrical and Computer Engineering, The University of Texas at Austin, Austin, TX 78712-1084 USA - - -



In this paper, we analyze the ergodic capacity and channel outage probability for a composite MIMO channel model, which includes both fast fading and shadowing effects. The ergodic capacity and exact channel outage probability with space-time water-filling can be evaluated through numerical integrations, which can be further simplified with approximated empirical eigenvalue and maximal eigenvalue distribution of MIMO fading channels. We also compare the performance of space-time water-filling with spatial water-filling. For MIMO channels with small shadowing effects, spatial water-filling performs very close to space-time water-filling in terms of ergodic capacity. For MIMO channels with large shadowing effects, however, space-time water-filling achieves significantly higher capacity per antenna than spatial water-filling at low to moderate SNR regimes, but with a much higher channel outage probability. We show that the analytical capacity and outage probability results agree very well with those obtained from Monte Carlo simulations.

COPYRIGHT NOTICE: All the documents on this server have been submitted by their authors to scholarly journals or conferences as indicated, for the purpose of non-commercial dissemination of scientific work. The manuscripts are put on-line to facilitate this purpose. These manuscripts are copyrighted by the authors or the journals in which they were published. You may copy a manuscript for scholarly, non-commercial purposes, such as research or instruction, provided that you agree to respect these copyrights.

Last Updated 05/14/06.