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Vienna University of Economics and Business
(31 results)-
White Papers
Integrated Pricing And Inventory Control With Reference Price Effects
July 25, 2007, 12:00am PDT
In this paper the authors study a joint pricing and inventory control model with backlogging for single items under reference price effects. The reference price effect models the empirically well...
Provided by Vienna University of Economics and Business
-
White Papers
The Great Recession Versus The Great Depression: Stylized Facts On Siblings That Were Given Different Foster Parents
February 15, 2010, 12:00am PST
This paper compares the depth of the Recent Crisis and the Great Depression. The authors use a new data set to compare the drop in activity in the industrialized countries for seven activity...
Provided by Vienna University of Economics and Business
-
White Papers
Leadership And Public Service Motivation In A Weberian Public Administration - A German-Austrian Comparative Perspective
April 9, 2010, 12:00am PDT
A central question for the future of applied Public Service Motivation (PSM) research is whether PSM influences leadership behavior and to which extent. To address this question, the authors focus...
Provided by Vienna University of Economics and Business
-
White Papers
Do We Need Any More Hierarchical Structures? Combining Vertical And Shared Leadership Considering The Organizational Culture, Structures And Processes
May 15, 2010, 12:00am PDT
In spite of decades of leadership research and numerous leadership theories no unequivocal recipe for success could be found for the leading of employees. Complex tasks, increasing competitive...
Provided by Vienna University of Economics and Business
-
Whitepapers
Accurate SINR Estimation Model for System Level Simulation of LTE Networks
May 24, 2012, 12:00am PDT
This paper presents an SINR prediction model for LTE systems with the aim of improving the accuracy of physical layer models used for higher-than-physical-level simulations. This physical layer...
Provided by Vienna University of Economics and Business
-
Whitepapers
Joint Network-Channel Coding for the Asymmetric Multiple-Access Relay Channel
May 24, 2012, 12:00am PDT
In this paper, the authors consider the time-division Multiple Access Relay Channel (MARC). They propose a low-complexity compress-and-forward-based transmission scheme that consists of a scalar...
Provided by Vienna University of Economics and Business
-
Whitepapers
Adaptive Channel Direction Quantization Based on Spherical Prediction
May 24, 2012, 12:00am PDT
In this paper, the authors present algorithms for the quantization of a correlated unit norm random vector process. Such algorithms are important, e.g., for channel vector quantization in wireless...
Provided by Vienna University of Economics and Business
-
Whitepapers
Users in Cells: a Data Traffic Analysis
March 12, 2012, 12:00am PDT
The authors present a large-scale cell based measurement analysis of the user behavior in a live operational HSDPA network. The motivations are: first, to understand the statistical properties of...
Provided by Vienna University of Economics and Business
-
Whitepapers
Energy Efficient Service Delivery in Clouds in Compliance with the Kyoto Protocol
April 30, 2012, 12:00am PDT
Cloud computing is revolutionizing the ICT landscape by providing scalable and efficient computing resources on demand. The ICT industry - especially data centers, are responsible for considerable...
Provided by Vienna University of Economics and Business
-
Whitepapers
PDM Based I-SOAS Data Warehouse Design
January 25, 2009, 12:00am PST
This paper briefly describes the industrial contributions of Product Data Management in any organization's technical and managerial data management. Then focusing on some current major PDM based...
Provided by Vienna University of Economics and Business
-
Whitepapers
Adaptive Mesh Approach for Predicting Algorithm Behavior with Application to Visibility Culling in Computer Graphics
March 12, 2009, 12:00am PDT
The authors propose a concise approximate description, and a method for efficiently obtaining this description, via adaptive random sampling of the performance (running time, memory consumption,...
Provided by Vienna University of Economics and Business
-
Whitepapers
Conflict Visualization for Evolving UML Models
September 28, 2012, 12:00am PDT
The urgent demand for supporting teamwork and continuous evolution of software models triggered intensive research on optimistic version control systems for models. State-of-the-art model...
Provided by Vienna University of Economics and Business
-
Whitepapers
Architecture of a Modular IEEE 802.15.4a Ultra-Wideband Transmitter
August 6, 2008, 12:00am PDT
As part of a multi-channel, multi-band evaluation platform for future wireless sensor network applications, an IEEE 802.15.4a standard conform transmitter is investigated. The paper gives an...
Provided by Vienna University of Economics and Business
-
Whitepapers
Testbedding MIMO HSDPA and WiMAX
September 1, 2009, 12:00am PDT
Modern wireless communication systems employ MIMO and feedback - two properties that make it especially difficult to measure the performance of such systems with reasonable effort in actual...
Provided by Vienna University of Economics and Business
-
Whitepapers
MIMO HSDPA Throughput Measurement Results in an Urban Scenario
September 1, 2009, 12:00am PDT
In this paper, the authors report on results of MIMO High Speed Downlink Packet Access (HSDPA) throughput measurements. These measurements were carried out in an urban scenario. Besides the...
Provided by Vienna University of Economics and Business
-
Whitepapers
Measurement Based Evaluation of Low Complexity Receivers for D-TXAA HSDPA
August 1, 2008, 12:00am PDT
In 2007, the 3GPP agreed to standardize D-TxAA (Dual Stream Transmit Antenna Array) as the MIMO extension for HSDPA (High Speed Downlink Packet Access). In this paper, the authors examine receiver...
Provided by Vienna University of Economics and Business
-
Whitepapers
Simulating the Long Term Evolution Physical Layer
August 28, 2009, 12:00am PDT
Research and development of signal processing algorithms for UMTS Long Term Evolution (LTE) requires a realistic, flexible, and standard-compliant simulation environment. To facilitate comparisons...
Provided by Vienna University of Economics and Business
-
Whitepapers
Interference Alignment in the Partially Connected K-User MIMO Interference Channel
June 1, 2011, 12:00am PDT
The authors consider interference alignment in the partially connected K-user MIMO Interference Channel (IC). Conversely to the fully-connected case, they show that interference alignment can be...
Provided by Vienna University of Economics and Business
-
Whitepapers
MIMO-BICM with Imperfect Channel State Information: Exit Chart Analysis and Ldpc Code Optimization
November 25, 2008, 12:00am PST
The authors investigate MIMO systems employing bit-interleaved coded modulation and iterative decoding with imperfect channel estimates. An optimum soft demodulator for this scenario with i.i.d....
Provided by Vienna University of Economics and Business
-
Whitepapers
Carrier Frequency Synchronization in the Downlink of 3GPP LTE
September 8, 2010, 12:00am PDT
In this paper, the authors investigate carrier frequency synchronization in the downlink of 3GPP Long Term Evolution (LTE). A complete carrier frequency offset estimation and compensation scheme...
Provided by Vienna University of Economics and Business
-
Whitepapers
Validation of Minimum-Energy Band-Limited Prediction Using Vehicular Channel Measurements
July 28, 2009, 12:00am PDT
The authors demonstrate that Minimum-Energy (ME) band-limited prediction shows the same robust performance for vehicular channel measurements as well as for the numeric Clarke channel model. By...
Provided by Vienna University of Economics and Business
-
Whitepapers
Optimal Pilot Symbol Power Allocation in Multi-Cell Scenarios of LTE
November 9, 2011, 12:00am PST
Current systems for cellular wireless communication are designed for coherent detection. Therefore, the channel estimator is a crucial part of a receiver. UMTS Long Term Evolution (LTE) provides a...
Provided by Vienna University of Economics and Business
-
Whitepapers
End-User Development in a Graphical User Interface Setting
February 12, 2009, 12:00am PST
In many areas, software applications must be highly configurable - using a pre-defined set of options or preferences is not flexible enough. One way to improve an application's flexibility is to...
Provided by Vienna University of Economics and Business
-
Whitepapers
Boosting Sphere Decoding Speed Through Graphic Processing Units
April 1, 2010, 12:00am PDT
Graphic Processing Units (GPUs) have evolved to provide a massive computational power. In contrast to Central Processing Units, GPUs are so-called many-core processors with hundreds of cores...
Provided by Vienna University of Economics and Business
-
Whitepapers
Event-Based Monitoring of Open Source Software Projects
October 23, 2007, 12:00am PDT
Project management traditionally has a strong focus on human reporting that fits well a tightly coupled form of organization to ensure the quality of project reporting. For loosely coupled forms...
Provided by Vienna University of Economics and Business
-
Whitepapers
Vector Perturbation Precoding for Receivers With Limited Dynamic Range
January 8, 2009, 12:00am PST
In this paper, the authors consider the Vector Perturbation (VP) pre-coding scheme for the multiuser MISO broadcast channel proposed by Hochwald et al. under the practical assumption that the...
Provided by Vienna University of Economics and Business
-
Whitepapers
Lines of Malicious Code: Insights Into the Malicious Software Industry
January 7, 2013, 12:00am PST
Malicious software installed on infected computers is a fundamental component of online crime. Malware development thus plays an essential role in the underground economy of cyber-crime. Malware...
Provided by Vienna University of Economics and Business
-
Whitepapers
Vanity, Cracks and Malware
November 6, 2012, 12:00am PST
Today, a large amount of software products include mechanisms to counter software piracy. However, most protection mechanisms can be easily circumvented by applying soft-ware patches (cracks) or...
Provided by Vienna University of Economics and Business
-
Whitepapers
Securing a Space-Based Service Architecture With Coordination-Driven Access Control
March 21, 2013, 12:00am PDT
In distributed applications, multiple autonomous processes need to collaborate in an efficient way. Space-based middleware enables data-driven coordination for these processes via shared tuple...
Provided by Vienna University of Economics and Business
-
White Papers
Leaders, Followers, And Risk Dynamics In Industry Equilibrium
February 15, 2009, 12:00am PST
The authors study own and rival risk in a dynamic duopoly with a homogeneous output good, stochastic industry demand, and real options to expand or contract capacity. They focus on asymmetric cost...
Provided by Vienna University of Economics and Business
-
Whitepapers
Minimum Variance Estimation of a Sparse Vector Within the Linear Gaussian Model: An RKHS Approach
April 16, 2013, 12:00am PDT
The authors consider minimum variance estimation within the Sparse Linear Gaussian Model (SLGM). A sparse vector is to be estimated from a linearly transformed version embedded in Gaussian noise....
Provided by Vienna University of Economics and Business
-
Whitepapers
Minimum Variance Estimation of a Sparse Vector Within the Linear Gaussian Model: An RKHS Approach
April 16, 2013, 12:00am PDT
The authors consider minimum variance estimation within the Sparse Linear Gaussian Model (SLGM). A sparse vector is to be estimated from a linearly transformed version embedded in Gaussian noise....
Provided by Vienna University of Economics and Business
-
Whitepapers
Securing a Space-Based Service Architecture With Coordination-Driven Access Control
March 21, 2013, 12:00am PDT
In distributed applications, multiple autonomous processes need to collaborate in an efficient way. Space-based middleware enables data-driven coordination for these processes via shared tuple...
Provided by Vienna University of Economics and Business
-
Whitepapers
Vanity, Cracks and Malware
November 6, 2012, 12:00am PST
Today, a large amount of software products include mechanisms to counter software piracy. However, most protection mechanisms can be easily circumvented by applying soft-ware patches (cracks) or...
Provided by Vienna University of Economics and Business
-
Whitepapers
Lines of Malicious Code: Insights Into the Malicious Software Industry
January 7, 2013, 12:00am PST
Malicious software installed on infected computers is a fundamental component of online crime. Malware development thus plays an essential role in the underground economy of cyber-crime. Malware...
Provided by Vienna University of Economics and Business
-
Whitepapers
Vector Perturbation Precoding for Receivers With Limited Dynamic Range
January 8, 2009, 12:00am PST
In this paper, the authors consider the Vector Perturbation (VP) pre-coding scheme for the multiuser MISO broadcast channel proposed by Hochwald et al. under the practical assumption that the...
Provided by Vienna University of Economics and Business
-
Whitepapers
Event-Based Monitoring of Open Source Software Projects
October 23, 2007, 12:00am PDT
Project management traditionally has a strong focus on human reporting that fits well a tightly coupled form of organization to ensure the quality of project reporting. For loosely coupled forms...
Provided by Vienna University of Economics and Business
-
Whitepapers
Boosting Sphere Decoding Speed Through Graphic Processing Units
April 1, 2010, 12:00am PDT
Graphic Processing Units (GPUs) have evolved to provide a massive computational power. In contrast to Central Processing Units, GPUs are so-called many-core processors with hundreds of cores...
Provided by Vienna University of Economics and Business
-
Whitepapers
End-User Development in a Graphical User Interface Setting
February 12, 2009, 12:00am PST
In many areas, software applications must be highly configurable - using a pre-defined set of options or preferences is not flexible enough. One way to improve an application's flexibility is to...
Provided by Vienna University of Economics and Business
-
Whitepapers
Optimal Pilot Symbol Power Allocation in Multi-Cell Scenarios of LTE
November 9, 2011, 12:00am PST
Current systems for cellular wireless communication are designed for coherent detection. Therefore, the channel estimator is a crucial part of a receiver. UMTS Long Term Evolution (LTE) provides a...
Provided by Vienna University of Economics and Business
-
Whitepapers
Validation of Minimum-Energy Band-Limited Prediction Using Vehicular Channel Measurements
July 28, 2009, 12:00am PDT
The authors demonstrate that Minimum-Energy (ME) band-limited prediction shows the same robust performance for vehicular channel measurements as well as for the numeric Clarke channel model. By...
Provided by Vienna University of Economics and Business
-
Whitepapers
Carrier Frequency Synchronization in the Downlink of 3GPP LTE
September 8, 2010, 12:00am PDT
In this paper, the authors investigate carrier frequency synchronization in the downlink of 3GPP Long Term Evolution (LTE). A complete carrier frequency offset estimation and compensation scheme...
Provided by Vienna University of Economics and Business
-
Whitepapers
MIMO-BICM with Imperfect Channel State Information: Exit Chart Analysis and Ldpc Code Optimization
November 25, 2008, 12:00am PST
The authors investigate MIMO systems employing bit-interleaved coded modulation and iterative decoding with imperfect channel estimates. An optimum soft demodulator for this scenario with i.i.d....
Provided by Vienna University of Economics and Business
-
Whitepapers
Interference Alignment in the Partially Connected K-User MIMO Interference Channel
June 1, 2011, 12:00am PDT
The authors consider interference alignment in the partially connected K-user MIMO Interference Channel (IC). Conversely to the fully-connected case, they show that interference alignment can be...
Provided by Vienna University of Economics and Business
-
Whitepapers
Simulating the Long Term Evolution Physical Layer
August 28, 2009, 12:00am PDT
Research and development of signal processing algorithms for UMTS Long Term Evolution (LTE) requires a realistic, flexible, and standard-compliant simulation environment. To facilitate comparisons...
Provided by Vienna University of Economics and Business
-
Whitepapers
Measurement Based Evaluation of Low Complexity Receivers for D-TXAA HSDPA
August 1, 2008, 12:00am PDT
In 2007, the 3GPP agreed to standardize D-TxAA (Dual Stream Transmit Antenna Array) as the MIMO extension for HSDPA (High Speed Downlink Packet Access). In this paper, the authors examine receiver...
Provided by Vienna University of Economics and Business
-
Whitepapers
MIMO HSDPA Throughput Measurement Results in an Urban Scenario
September 1, 2009, 12:00am PDT
In this paper, the authors report on results of MIMO High Speed Downlink Packet Access (HSDPA) throughput measurements. These measurements were carried out in an urban scenario. Besides the...
Provided by Vienna University of Economics and Business
-
Whitepapers
Testbedding MIMO HSDPA and WiMAX
September 1, 2009, 12:00am PDT
Modern wireless communication systems employ MIMO and feedback - two properties that make it especially difficult to measure the performance of such systems with reasonable effort in actual...
Provided by Vienna University of Economics and Business
-
Whitepapers
Architecture of a Modular IEEE 802.15.4a Ultra-Wideband Transmitter
August 6, 2008, 12:00am PDT
As part of a multi-channel, multi-band evaluation platform for future wireless sensor network applications, an IEEE 802.15.4a standard conform transmitter is investigated. The paper gives an...
Provided by Vienna University of Economics and Business
-
Whitepapers
Conflict Visualization for Evolving UML Models
September 28, 2012, 12:00am PDT
The urgent demand for supporting teamwork and continuous evolution of software models triggered intensive research on optimistic version control systems for models. State-of-the-art model...
Provided by Vienna University of Economics and Business
-
Whitepapers
Adaptive Mesh Approach for Predicting Algorithm Behavior with Application to Visibility Culling in Computer Graphics
March 12, 2009, 12:00am PDT
The authors propose a concise approximate description, and a method for efficiently obtaining this description, via adaptive random sampling of the performance (running time, memory consumption,...
Provided by Vienna University of Economics and Business
-
Whitepapers
PDM Based I-SOAS Data Warehouse Design
January 25, 2009, 12:00am PST
This paper briefly describes the industrial contributions of Product Data Management in any organization's technical and managerial data management. Then focusing on some current major PDM based...
Provided by Vienna University of Economics and Business
-
Whitepapers
Energy Efficient Service Delivery in Clouds in Compliance with the Kyoto Protocol
April 30, 2012, 12:00am PDT
Cloud computing is revolutionizing the ICT landscape by providing scalable and efficient computing resources on demand. The ICT industry - especially data centers, are responsible for considerable...
Provided by Vienna University of Economics and Business
-
Whitepapers
Users in Cells: a Data Traffic Analysis
March 12, 2012, 12:00am PDT
The authors present a large-scale cell based measurement analysis of the user behavior in a live operational HSDPA network. The motivations are: first, to understand the statistical properties of...
Provided by Vienna University of Economics and Business
-
Whitepapers
Adaptive Channel Direction Quantization Based on Spherical Prediction
May 24, 2012, 12:00am PDT
In this paper, the authors present algorithms for the quantization of a correlated unit norm random vector process. Such algorithms are important, e.g., for channel vector quantization in wireless...
Provided by Vienna University of Economics and Business
-
Whitepapers
Joint Network-Channel Coding for the Asymmetric Multiple-Access Relay Channel
May 24, 2012, 12:00am PDT
In this paper, the authors consider the time-division Multiple Access Relay Channel (MARC). They propose a low-complexity compress-and-forward-based transmission scheme that consists of a scalar...
Provided by Vienna University of Economics and Business
-
Whitepapers
Accurate SINR Estimation Model for System Level Simulation of LTE Networks
May 24, 2012, 12:00am PDT
This paper presents an SINR prediction model for LTE systems with the aim of improving the accuracy of physical layer models used for higher-than-physical-level simulations. This physical layer...
Provided by Vienna University of Economics and Business
-
White Papers
Leaders, Followers, And Risk Dynamics In Industry Equilibrium
February 15, 2009, 12:00am PST
The authors study own and rival risk in a dynamic duopoly with a homogeneous output good, stochastic industry demand, and real options to expand or contract capacity. They focus on asymmetric cost...
Provided by Vienna University of Economics and Business
-
White Papers
Do We Need Any More Hierarchical Structures? Combining Vertical And Shared Leadership Considering The Organizational Culture, Structures And Processes
May 15, 2010, 12:00am PDT
In spite of decades of leadership research and numerous leadership theories no unequivocal recipe for success could be found for the leading of employees. Complex tasks, increasing competitive...
Provided by Vienna University of Economics and Business
-
White Papers
Leadership And Public Service Motivation In A Weberian Public Administration - A German-Austrian Comparative Perspective
April 9, 2010, 12:00am PDT
A central question for the future of applied Public Service Motivation (PSM) research is whether PSM influences leadership behavior and to which extent. To address this question, the authors focus...
Provided by Vienna University of Economics and Business
-
White Papers
The Great Recession Versus The Great Depression: Stylized Facts On Siblings That Were Given Different Foster Parents
February 15, 2010, 12:00am PST
This paper compares the depth of the Recent Crisis and the Great Depression. The authors use a new data set to compare the drop in activity in the industrialized countries for seven activity...
Provided by Vienna University of Economics and Business
-
White Papers
Integrated Pricing And Inventory Control With Reference Price Effects
July 25, 2007, 12:00am PDT
In this paper the authors study a joint pricing and inventory control model with backlogging for single items under reference price effects. The reference price effect models the empirically well...
Provided by Vienna University of Economics and Business
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