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Patients' caring needs for a patient-friendly magnetic resonance imaging examination: a qualitative study. [PDF]
BMC Health Serv ResYoo HJ, Shim J.
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Correction for Agrawal and Dehaene, From retinotopic to ordinal coding: Dissecting the cortical stages of visual word recognition. [PDF]
Proc Natl Acad Sci U S Aeuropepmc +1 more source
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Space-time block codes versus space-time trellis codes
ICC 2001. IEEE International Conference on Communications. Conference Record (Cat. No.01CH37240), 2002Two outstanding examples of transmit diversity schemes for the multiple-antenna flat-fading channel are space-time block coding (STBC) and space-time trellis coding (STTC). We compare the performance of STBC and STTC in terms of the frame error rate keeping the transmit power, spectral efficiency and number of trellis states fixed.
Sumeet Sandhu +2 more
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On Distributed Space-Time Coding
2007 IEEE Wireless Communications and Networking Conference, 2007Codes construction for cooperative diversity in ad-hoc networks is considered. In the context of decoded-and-forward strategy, a new class of distributed space-time codes is proposed. This class is tolerant to timing offsets between the different relays, which is crucial for relaying over ad-hoc networks that lack a timing reference. The proposed codes
Mohamed Oussama Damen, Roger Hammons
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Convolutional Space-Time Codes
2006 Canadian Conference on Electrical and Computer Engineering, 2006Space-time codes are usually generated using a generator matrix with 2 columns and mod 4 operations for QPSK modulation with two transmit antennas. A Z4 convolutional code has also been used to represent these space-time codes. Another way of representing them is to use a conventional binary convolutional code of rate 2/4.
David Bernier, François Chan
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Concatenated space-time coding
12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598), 2002The serial concatenation of standard convolutional codes with differential space-time modulation is considered for fast flat fading multiple antenna channels. Decoding is performed iteratively by passing symbol-wise a-posteriori probability information between the decoders of the inner space-time code and the outer convolutional code.
Christian Schlegel, Alex J. Grant
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Proceedings. International Symposium on Information Theory, 2005. ISIT 2005., 2005
Rateless codes are good codes of infinite length that have the property that prefixes of such codes are themselves good codes. This makes them attractive for applications in which the channel quality is uncertain, where systems transmit as much of a codeword as necessary for decoding to be possible.
Uri Erez +2 more
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Rateless codes are good codes of infinite length that have the property that prefixes of such codes are themselves good codes. This makes them attractive for applications in which the channel quality is uncertain, where systems transmit as much of a codeword as necessary for decoding to be possible.
Uri Erez +2 more
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On the performance of space-time codes
Proceedings of the IEEE Information Theory Workshop, 2003This paper provides an overview of the results in a recent journal submission by the same authors. The first part of that paper studies the pairwise error probability of codewords (PEP) of a space-time code over a quasistatic channel, using an approach that allows both known and unknown channel cases to be considered simultaneously.
Hsiao-feng Lu +3 more
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IEEE Transactions on Information Theory, 2003
Summary: A universal framework is developed for constructing full-rate and full-diversity coherent space-time codes for systems with arbitrary numbers of transmit and receive antennas. The proposed framework combines space-time layering concepts with algebraic component codes optimized for single-input-single-output (SISO) channels. Each component code
Hesham El Gamal, Mohamed Oussama Damen
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Summary: A universal framework is developed for constructing full-rate and full-diversity coherent space-time codes for systems with arbitrary numbers of transmit and receive antennas. The proposed framework combines space-time layering concepts with algebraic component codes optimized for single-input-single-output (SISO) channels. Each component code
Hesham El Gamal, Mohamed Oussama Damen
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Lattice code decoder for space-time codes
IEEE Communications Letters, 2000We explore the lattice sphere packing representation of a multi-antenna system and the algebraic space-time (ST) codes. We apply the sphere decoding (SD) algorithm to the resulted lattice code. For the uncoded system, SD yields, with small increase in complexity, a huge improvement over the well-known V-BLAST detection algorithm.
Mohamed Oussama Damen +2 more
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