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ICASSP
2011
IEEE
14 years 1 months ago
On the implementation of MIMO-OFDM schemes using perturbation of the QR decomposition: Application to 3GPP LTE-a systems
Consider a flat-fading Multiple-Input Multiple-Output (MIMO) system. The near-optimum detection problematic has been shown to be efficiently solved through QR Decomposition (QRD...
Sébastien Aubert, Jane Tournois, Fabienne N...
ICASSP
2011
IEEE
14 years 1 months ago
Are all basis updates for lattice-reduction-aided MIMO detection necessary?
The question in the title is relevant when considering latticereduction-aided MIMO detectors, which achieve the same diversity as the maximum-likelihood detector while exhibiting ...
Brian Gestner, Xiaoli Ma, David V. Anderson
AIML
2004
14 years 11 months ago
A Lower Complexity Bound for Propositional Dynamic Logic with Intersection
This paper shows that satisfiability for Propositional Dynamic Logic with Intersection is EXPSPACE-hard. The proof uses a reduction from the word problem for alternating, exponent...
Martin Lange
KGC
1997
Springer
15 years 1 months ago
Looking for an Analogue of Rice's Theorem in Circuit Complexity Theory
Rice’s Theorem says that every nontrivial semantic property of programs is undecidable. In this spirit we show the following: Every nontrivial absolute (gap, relative) counting p...
Bernd Borchert, Frank Stephan
GLOBECOM
2006
IEEE
15 years 3 months ago
A Lattice-Reduction-Aided Soft Detector for Multiple-Input Multiple-Output Channels
— Lattice basis reduction is a powerful technique that enables a hard-output detector for a multiple-input multiple-output channel to approach maximum-likelihood performance with...
David L. Milliner, John R. Barry