Optimal designs for space-time linear precoders and decoders
Scaglione, A.; Stoica, P.; Barbarossa, S.; Giannakis, G.B.; Sampath, H.
Signal Processing, IEEE Transactions on
Volume 50, Issue 5, May 2002 Page(s):1051 - 1064
Digital Object Identifier 10.1109/78.995062
Summary:We introduce a new paradigm for the design of transmitter
space-time coding that we refer to as linear precoding. It leads to
simple closed-form solutions for transmission over frequency-selective
multiple-input multiple-output (MIMO) channels, which are scalable with
respect to the number of antennas, size of the coding block, and
transmit average/peak power. The scheme operates as a block transmission
system in which vectors of symbols are encoded and modulated through a
linear mapping operating jointly in the space and time dimension. The
specific designs target minimization of the symbol mean square error and
the approximate maximization of the minimum distance between symbol
hypotheses, under average and peak power constraints. The solutions are
shown to convert the MIMO channel with memory into a set of parallel
flat fading subchannels, regardless of the design criterion, while
appropriate power/bits loading on the subchannels is the specific
signature of the different designs. The proposed designs are compared in
terms of various performance measures such as information rate, BER, and
symbol mean square error
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