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Virginia Systems
(14 results)-
Whitepapers
Architecture-Aware Mapping and Optimization on a 1600-Core GPU
December 1, 2011, 12:00am PST
The Graphics Processing Unit (GPU) continues to make in-roads as a computational accelerator for HighPerformance Computing (HPC). However, despite its increasing popularity, mapping and optimizing...
Provided by Virginia Systems
-
Whitepapers
On the Efficacy of a Fused CPU+GPU Processor (or APU) for Parallel Computing
July 1, 2011, 12:00am PDT
The Graphics Processing Unit (GPU) has made significant strides as an accelerator in parallel computing. However, because the GPU has resided out on PCIe as a discrete device, the performance of...
Provided by Virginia Systems
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Whitepapers
Towards Accelerating Molecular Modeling Via Multi-Scale Approximation on a GPU
February 1, 2011, 12:00am PST
Research efforts to analyze biomolecular properties contribute towards the authors' understanding of biomolecular function. Calculating non-bonded forces (or in their case, electrostatic surface...
Provided by Virginia Systems
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Whitepapers
Efficient Jamming Attacks on MIMO Channels
May 24, 2012, 12:00am PDT
This paper investigates efficient jamming attacks against MIMO-enabled systems. Previous research has focused on jamming data transmissions. The authors instead focus on jamming channel sounding...
Provided by Virginia Systems
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Whitepapers
Performance of Pilot Jamming on MIMO Channels With Imperfect Synchronization
May 24, 2012, 12:00am PDT
This paper explores effects of pilot based jamming attacks with synchronization mismatches on MIMO-OFDM systems. Both MIMO and OFDM based systems employ known data called pilot tones to estimate...
Provided by Virginia Systems
-
Whitepapers
Geolocation of MIMO Signals Using the Cross Ambiguity Function and TDOA/FDOA
May 24, 2012, 12:00am PDT
The geolocation of RF signals has many civilian and military applications. One technique for geolocation involves using the Cross Ambiguity Function (CAF) to calculate the Time...
Provided by Virginia Systems
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Whitepapers
Theorizing in Information Systems Research Using Focus Groups
June 14, 2012, 12:00am PDT
Information Systems researchers have embraced a number of qualitative research approaches and methodologies, including interviews, observations, and even action research. One research method...
Provided by Virginia Systems
-
Whitepapers
Impact of Geographic Complementarity in Dynamic Spectrum Access
March 4, 2011, 12:00am PST
In this paper, the authors examines the impact of demand bids which account for geographic complementarity in spectrum demand, on the allocation and pricing of wireless spectrum licenses. Using an...
Provided by Virginia Systems
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Whitepapers
Efficient Algorithms for Maximum Link Scheduling in Distributed Computing Models With SINR Constraints
November 16, 2012, 12:00am PST
In this paper, the authors develop a set of fast distributed algorithms in the SINR model, providing constant approximation for the maximum link scheduling problem under uniform power assignment....
Provided by Virginia Systems
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Whitepapers
Distributed Approximation Algorithms for Maximum Link Scheduling and Local Broadcasting in the Physical Interference Model
August 15, 2012, 12:00am PDT
In this paper, the authors develop the first rigorous distributed algorithm for link scheduling in the SINR model under any length-monotone sub-linear power assignments (including linear,...
Provided by Virginia Systems
-
Whitepapers
Integrated Multi-Network Modeling Environment for Spectrum Management
August 17, 2012, 12:00am PDT
Modeling and analysis of spectrum demand in large scale urban regions is key to effective Dynamic Spectrum Access (DSA) in the next generation networks. Some of the recent work on characterizing...
Provided by Virginia Systems
-
Whitepapers
Implications of Dynamic Spectrum Access on the Efficiency of Primary Wireless Market
February 2, 2010, 12:00am PST
In this paper, the authors develop a microscopic, agent-based simulation tool, called SIGMA-SPECTRUM to study the dynamics of the primary wireless spectrum market. A detailed, synthetic demand...
Provided by Virginia Systems
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Whitepapers
Synthesis and Analysis of Spatio-Temporal Spectrum Demand Patterns: A First Principles Approach
February 2, 2010, 12:00am PST
Modeling and analysis of Primary User (PU) spectrum requirement is key to effective Dynamic Spectrum Access (DSA). Allocation of long term licenses, as well as opportunistic spectrum usage by...
Provided by Virginia Systems
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Whitepapers
Location Estimation Using Differential RSS with Spatially Correlated Shadowing
October 27, 2009, 12:00am PDT
In this paper, the authors propose a new localization technique using Differential Received Signal Strength (DRSS) which does not require signal source cooperation for location estimation....
Provided by Virginia Systems
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Whitepapers
Location Estimation Using Differential RSS with Spatially Correlated Shadowing
October 27, 2009, 12:00am PDT
In this paper, the authors propose a new localization technique using Differential Received Signal Strength (DRSS) which does not require signal source cooperation for location estimation....
Provided by Virginia Systems
-
Whitepapers
Synthesis and Analysis of Spatio-Temporal Spectrum Demand Patterns: A First Principles Approach
February 2, 2010, 12:00am PST
Modeling and analysis of Primary User (PU) spectrum requirement is key to effective Dynamic Spectrum Access (DSA). Allocation of long term licenses, as well as opportunistic spectrum usage by...
Provided by Virginia Systems
-
Whitepapers
Implications of Dynamic Spectrum Access on the Efficiency of Primary Wireless Market
February 2, 2010, 12:00am PST
In this paper, the authors develop a microscopic, agent-based simulation tool, called SIGMA-SPECTRUM to study the dynamics of the primary wireless spectrum market. A detailed, synthetic demand...
Provided by Virginia Systems
-
Whitepapers
Integrated Multi-Network Modeling Environment for Spectrum Management
August 17, 2012, 12:00am PDT
Modeling and analysis of spectrum demand in large scale urban regions is key to effective Dynamic Spectrum Access (DSA) in the next generation networks. Some of the recent work on characterizing...
Provided by Virginia Systems
-
Whitepapers
Distributed Approximation Algorithms for Maximum Link Scheduling and Local Broadcasting in the Physical Interference Model
August 15, 2012, 12:00am PDT
In this paper, the authors develop the first rigorous distributed algorithm for link scheduling in the SINR model under any length-monotone sub-linear power assignments (including linear,...
Provided by Virginia Systems
-
Whitepapers
Efficient Algorithms for Maximum Link Scheduling in Distributed Computing Models With SINR Constraints
November 16, 2012, 12:00am PST
In this paper, the authors develop a set of fast distributed algorithms in the SINR model, providing constant approximation for the maximum link scheduling problem under uniform power assignment....
Provided by Virginia Systems
-
Whitepapers
Impact of Geographic Complementarity in Dynamic Spectrum Access
March 4, 2011, 12:00am PST
In this paper, the authors examines the impact of demand bids which account for geographic complementarity in spectrum demand, on the allocation and pricing of wireless spectrum licenses. Using an...
Provided by Virginia Systems
-
Whitepapers
Theorizing in Information Systems Research Using Focus Groups
June 14, 2012, 12:00am PDT
Information Systems researchers have embraced a number of qualitative research approaches and methodologies, including interviews, observations, and even action research. One research method...
Provided by Virginia Systems
-
Whitepapers
Geolocation of MIMO Signals Using the Cross Ambiguity Function and TDOA/FDOA
May 24, 2012, 12:00am PDT
The geolocation of RF signals has many civilian and military applications. One technique for geolocation involves using the Cross Ambiguity Function (CAF) to calculate the Time...
Provided by Virginia Systems
-
Whitepapers
Performance of Pilot Jamming on MIMO Channels With Imperfect Synchronization
May 24, 2012, 12:00am PDT
This paper explores effects of pilot based jamming attacks with synchronization mismatches on MIMO-OFDM systems. Both MIMO and OFDM based systems employ known data called pilot tones to estimate...
Provided by Virginia Systems
-
Whitepapers
Efficient Jamming Attacks on MIMO Channels
May 24, 2012, 12:00am PDT
This paper investigates efficient jamming attacks against MIMO-enabled systems. Previous research has focused on jamming data transmissions. The authors instead focus on jamming channel sounding...
Provided by Virginia Systems
-
Whitepapers
Towards Accelerating Molecular Modeling Via Multi-Scale Approximation on a GPU
February 1, 2011, 12:00am PST
Research efforts to analyze biomolecular properties contribute towards the authors' understanding of biomolecular function. Calculating non-bonded forces (or in their case, electrostatic surface...
Provided by Virginia Systems
-
Whitepapers
On the Efficacy of a Fused CPU+GPU Processor (or APU) for Parallel Computing
July 1, 2011, 12:00am PDT
The Graphics Processing Unit (GPU) has made significant strides as an accelerator in parallel computing. However, because the GPU has resided out on PCIe as a discrete device, the performance of...
Provided by Virginia Systems
-
Whitepapers
Architecture-Aware Mapping and Optimization on a 1600-Core GPU
December 1, 2011, 12:00am PST
The Graphics Processing Unit (GPU) continues to make in-roads as a computational accelerator for HighPerformance Computing (HPC). However, despite its increasing popularity, mapping and optimizing...
Provided by Virginia Systems
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