Transmit antennae space-time block coding for generalized OFDM inthe presence of unknown multipath
Liu, Z.; Giannakis, G.B.; Barbarossa, S.; Scaglione, A.
Selected Areas in Communications, IEEE Journal on
Volume 19, Issue 7, Jul 2001 Page(s):1352 - 1364
Digital Object Identifier 10.1109/49.932702
Summary:Transmit antenna diversity has been exploited to develop
high-performance space-time coders and simple maximum-likelihood
decoders for transmissions over flat fading channels. Relying on block
precoding, this paper develops generalized space-time coded multicarrier
transceivers appropriate for wireless propagation over
frequency-selective multipath channels. Multicarrier precoding maps the
frequency-selective channel into a set of flat fading subchannels,
whereas space-time encoding/decoding facilitates equalization and
achieves performance gains by exploiting the diversity available with
multiple transmit antennas. When channel state information is unknown at
the receiver, it is acquired blindly based on a deterministic variant of
the constant-modulus algorithm that exploits the structure of space-time
block codes. To benchmark performance, the Cramer-Rao bound of the
channel estimates is also derived. System performance is evaluated both
analytically and with simulations
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