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Contact:
Marcus Greferath
School of Math. Sciences
University College Dublin
Belfield, Dublin 4, Ireland
Phone:
+353-1-716-2588 (UCD)
+353-85-153-0951 (mobile)
Joachim Rosenthal
Institut of Mathematics
University of Zurich
Winterthurerstrasse 190
8057 Zurich, Switzerland
Phone:
+41-44-63 55884 (office)
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ITW 2010 Dublin
IEEE Information Theory Workshop
Dublin, August 30 - September 3, 2010
Communication with multiple antennas
Mon 30 Aug, 16.20-18.00, Room 2
Contributed session
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Yuval Lomnitz and Meir Feder
An Achievable Rate for the MIMO Individual Channel
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Abstract:
We consider the problem of communicating over a multiple-input
multiple-output (MIMO) real valued channel for which no mathematical
model is specified, and achievable rates are given as a function of
the channel input and output sequences known a-posteriori. This
paper extends previous results regarding individual channels by
presenting a rate function for the MIMO individual channel, and
showing its achievability in a fixed transmission rate communication
scenario.
Mon 30 Aug, 16.20-16.40, Room 2
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Lina Mroueh and Jean-Claude Belfiore
How to Achieve the Optimal DMT of Selective Fading MIMO Channels?
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Abstract:
In this paper, we extend the non-vanishing determinant
(NVD) criterion to the selective fading channel case. A new family
of split NVD parallel codes, that satisfies this design criterion,
is proposed to achieve the optimal diversity multiplexing tradeoff
(DMT) derived by Coronel and Bölcskei, IEEE ISIT,
2007. This result is of significant interest not only in its own
right, but also because it settles a long-standing debate in the
literature related to the optimal DMT of selective fading channels.
Mon 30 Aug, 16.40-17.00, Room 2
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Lakshmi Prasad Natarajan and B. Sundar Rajan
A New Full-diversity Criterion and Low-complexity STBCs with Partial Interference Cancellation Decoding
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Abstract:
Recently, Guo and Xia gave sufficient conditions for an STBC to
achieve full diversity when a PIC (Partial Interference
Cancellation) or a PIC-SIC (PIC with Successive Interference
Cancellation) decoder is used at the receiver. In this paper, we
give alternative conditions for an STBC to achieve full diversity
with PIC and PIC-SIC decoders, which are equivalent to Guo and Xia's
conditions, but are much easier to check. Using these conditions, we
construct a new class of full diversity PIC-SIC decodable codes,
which contain the Toeplitz codes and a family of codes recently
proposed by Zhang, Xu et. al. as proper subclasses. With the help of
the new criteria, we also show that a class of PIC-SIC decodable
codes recently proposed by Zhang, Shi et. al. can be decoded with
much lower complexity than what is reported, without compromising on
full diversity.
Mon 30 Aug, 17.00-17.20, Room 2
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Giuseppa Alfano, Antonio De Maio, and Antonia M. Tulino
Information-theoretic performance analysis of LMS MIMO communications
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Abstract:
Information-theoretic performance analysis of a MIMO communication
over Land Mobile Satellite (LMS) channels, under ergodic and
non-ergodic regimes, is performed. The capacity-achieving input
covariance matrix, and the corresponding ergodic capacity, assuming
perfect receive-side information but making different assumptions on
the amount of channel knowledge at the transmitter, are derived. We
obtain exact results, but for the case when perfect channel
knowledge is assumed at both ends of the link, for which we provide
an upper bound to the ergodic capacity. In the non-ergodic
scenario, we compute the outage capacity in absence of
power-control, and discuss the asymptotic Gaussianity of the mutual
information, which strongly depends on the overall number of degrees
of freedom available on the channel. Design guidelines for
multiantenna LMS channels are gained studying the low
Signal-to-Noise Ratio (SNR) behavior of the capacity, still under
the assumption of absence of knowledge of the channel matrix (or its
statistics) at the transmitter. The results are illustrated through
several examples, aimed at assessing the impact on the performance
of the diversity order and/or the Line-of-Sight (LOS) fluctuations.
Mon 30 Aug, 17.20-17.40, Room 2
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A. Taufiq Asyhari and Albert Guillén i Fàbregas
Coding for the MIMO ARQ Block-Fading Channel with Imperfect Feedback and CSIR
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Abstract:
We investigate the effects of imperfect channel knowledge and
feedback in incremental-redundancy automatic-repeat request
(INR-ARQ) coding systems over multiple-input multiple-output (MIMO)
block-fading channels. We propose an ARQ decoder based on nearest
neighbour decoding and evaluate the corresponding achievable
rates. We then derive the optimal code diversity assuming that the
feedback channel is modelled as a binary symmetric channel. Our main
results show that the feedback link reliability must improve with
the forward (transmission) signal-to-noise ratio (SNR) for the code
to exploit the diversity offered by ARQ scheme. We also identify the
conditions for achieving full diversity and for ARQ not helping in
improving the system's diversity.
Mon 30 Aug, 17.40-18.00, Room 2
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