IEEE Transactions on Vehicular Technology,
vol. 56, no. 2, Mar. 2007, pp. 652-660.
Joint Interference Cancellation and Channel
Shortening in Multi-User MIMO Systems
Roopsha Samanta,
Robert W. Heath, Jr.,
and
Brian L. Evans
Wireless Networking and
Communications Group,
The University of Texas at Austin,
Austin, TX 78712 USA
roopsha@ece.utexas.edu -
rheath@ece.utexas.edu -
bevans@ece.utexas.edu
Paper Draft
Abstract
In this paper, a two-stage receiver structure for interference
cancellation in multi-user spatially-multiplexed multiple-antenna
systems is presented.
A space-time equalizer is used in the first stage for joint
coantenna/cochannel interference suppression and shortening of the
effective channel for each transmit stream of the desired user.
The channel shortening, combined with independent detection,
helps reduce the complexity of the second stage Viterbi equalizer,
which is used for separate intersymbol interference equalization for
each of the streams.
Three objective functions are proposed for determining the coefficients
of the space-time equalizer using a direct training data-based approach,
which does not require estimation of the interferer's channel.
Simulation results show good symbol error performance as compared to
existing algorithms with asynchronous MIMO interferers.
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 04/04/07.