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Diversity-multiplexing tradeoff in two-user fading interference channels
Authors
Cemal Akçaba and Helmut BölcskeiReference
IEEE Transactions on Information Theory, 2012, to appear.[BibTeX, LaTeX, and HTML Reference] Abstract
We analyze the two-user single-antenna fading interference
channel with perfect receive channel state information
(CSI) and no transmit CSI. The diversity-multiplexing tradeoff
(DMT) region of a fixed-power-split Han and Kobayashi (HK)-type
superposition coding scheme is considered and design criteria
for the corresponding superposition codes are derived. We demonstrate
that this scheme is DMT-optimal under strong and very
strong interference by showing that it achieves a DMT region outer
bound that we derive. In addition, we show that, under very strong
interference, decoding interference while treating the intended signal
as noise, subtracting the result out, and then decoding the desired
signal, a process known as “stripping”, achieves the optimal
DMT region. Our proofs reveal code design criteria for achieving
DMT optimality (in the cases where we can demonstrate it).Keywords
Interference channel, diversity-multiplexing tradeoff, Han-Kobayashi scheme
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 Copyright Notice: © 2012 C. Akçaba and H. Bölcskei. This work has been submitted to the IEEE for possible publication. Copyright may be transferred without notice, after which this version may no longer be accessible.
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