Pre-equalization for MIMO wireless channels with delay spread

Authors

Hemanth Sampath, Helmut Bölcskei, and Arogyaswami J. Paulraj

Reference

IEEE Vehicular Technology Conference (VTC) Fall, Boston (MA), Vol. 3, pp. 1175-1178, Sept. 2000

DOI: 10.1109/VETECF.2000.886287

[BibTeX, LaTeX, and HTML Reference]

Abstract

We consider a downlink finite impulse response (FIR) multi-input multi-output (MIMO) wireless channel with L taps. It is shown that such a channel can be pre-equalized with an FIR MIMO transmit filter with only L taps, if the angle spread due to the different multipaths is sufficiently large at the transmitter. The filter taps are derived for the cases where the transmitter has perfect and partial channel knowledge, respectively. Finally, we present a pre-filter structure which converts the available frequency diversity into spatial diversity. The resulting spatial diversity can then be exploited using conventional receivers designed for frequency-flat fading channels.

Keywords

MIMO, wireless channels, pre-equalization, delay spread, angle spread


Download this document:

 

Copyright Notice: © 2000 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.

This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.