Title :
A road to future broadband wireless access: MIMO-OFDM-Based air interface
Author_Institution :
Res. & Innovation Center, Alcatel Shanghai Bell Co. Ltd., China
Abstract :
Orthogonal frequency-division multiplexing is a popular method for high-data-rate wireless transmission. OFDM may be combined with multiple antennas at both the access point and mobile terminal to increase diversity gain and/or enhance system capacity on a time-varying multipath fading channel, resulting in a multiple-input multiple-output OFDM system. In this article we give a brief technical overview of MIMO-OFDM system design. We focus on various research topics for the MIMO-OFDM-based air interface, including spatial channel modeling, MIMO-OFDM transceiver design, MIMO-OFDM channel estimation, space-time techniques for MIMO-OFDM, and error correction code. The corresponding link-level simulation results are encouraging, and show that MIMO-OFDM is a promising road to future broadband wireless access.
Keywords :
MIMO systems; OFDM modulation; antenna arrays; channel estimation; diversity reception; error correction codes; fading channels; mobile radio; multipath channels; radio access networks; radio links; space-time codes; time-varying channels; transceivers; MIMO-OFDM; air interface; broadband wireless access; channel estimation; diversity gain; error correction code; high-data-rate wireless transmission; link-level simulation; mobile terminal; multiple antennas; multiple-input multiple-output system; orthogonal frequency division multiplexing; space-time technique; spatial channel modeling; time-varying multipath fading channel; transceiver; Channel estimation; Diversity methods; Fading; Frequency division multiplexing; MIMO; Mobile antennas; OFDM; Roads; Time varying systems; Transceivers;
Journal_Title :
Communications Magazine, IEEE
DOI :
10.1109/MCOM.2005.1381875
