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Space-time-frequency (STF) coding for MIMO-OFDM systems

delete2002-09-01
delete107
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OA
AI
A
Andreas F. Molisch
M
Moe Z. Win
J
J.H. Winters
DOI：10.1109/LCOMM.2002.802047delete
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Abstract

Abstract

En 中文
We consider the capacity of multiple-input-multiple-output (MIMO) systems that use OFDM as the modulation format. We point out a basic equivalence between antennas and OFDM-tones. This similarity immediately allows us to essentially reuse all space-time codes designed for flat-fading channels in MIMO-OFDM systems operating in frequency-selective channels. An optimum code would thus code across all antennas and tones (as well as time) simultaneously. Since this can become very complex, we propose a method for grouping antennas and codes in such a way that the inherent diversity is retained, while the complexity is greatly reduced. Capacity computations between the full-complexity and the reduced-complexity systems illustrate this tradeoff.
Keywords:
MIMO
OFDM
space-time coding

Journal

IEEE Communications Letters cover
IEEE Communications Letters
IF:
4.4
Papers:
1.3W
Citations:
2.2W

Organization

No organization information available