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ICC
2007
IEEE
16 years 28 days ago
New UWB Receiver Designs Based on a Gaussian-Laplacian Noise-Plus-MAI Model
—Two novel receiver structures which surpass the performance of the conventional matched filter receiver are proposed for ultra-wide bandwidth multiple access communications. Th...
Norman C. Beaulieu, Somasundaram Niranjayan
VTC
2007
IEEE
103views Communications» more  VTC 2007»
16 years 27 days ago
A Simple Orthogonal Space-Time-Polarization Block Code
— This letter proposes a simple but highly efficient technique to jointly utilize space, time, and polarization diversities. The technique is based on extending orthogonal space-...
Beata J. Wysocki, Tadeusz A. Wysocki, Jennifer Seb...
ADAEUROPE
2007
Springer
16 years 24 days ago
Static Detection of Livelocks in Ada Multitasking Programs
Abstract. In this paper we present algorithms to statically detect livelocks in Ada multitasking programs. Although the algorithms’ worst-case execution time is exponential, they...
Johann Blieberger, Bernd Burgstaller, Robert Mitte...
ESORICS
2007
Springer
16 years 24 days ago
Obligations and Their Interaction with Programs
Obligations are pervasive in modern systems, often linked to access control decisions. We present a very general model of obligations as objects with state, and discuss its interac...
Daniel J. Dougherty, Kathi Fisler, Shriram Krishna...
STOC
2006
ACM
113views Algorithms» more  STOC 2006»
16 years 17 days ago
Logarithmic hardness of the directed congestion minimization problem
We show that for any constant ε > 0, there is no Ω(log1−ε M)approximation algorithm for the directed congestion minimization problem on networks of size M unless NP ⊆ Z...
Matthew Andrews, Lisa Zhang