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KTH Royal Institute of Technology
(262 results)-
White Papers
Analysis of Roles and Position of Mobile Network Operators in Mobile Payment Infrastructure
September 15, 2010, 12:00am PDT
A number of different mobile payment solutions have been presented the last decade. The phone subscription with its security mechanisms are used for user identification and payments. This is the...
Provided by KTH - Royal Institute of Technology
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White Papers
Voice over IP over GPRS
May 1, 2008, 12:00am PDT
The Voice over IP (VoIP) technology has become prevalent today due to its lower cost than traditional telephony and its ability to support new value-added services. Additionally, the increasing...
Provided by KTH Royal Institute of Technology
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White Papers
MagicNET: The Human Immune System and Network Security System
January 1, 2009, 12:00am PST
Most of the current security systems do not provide adequate level of protection against ever-increasing threats. The main reason for their failure is the use of point solutions to protect hosts...
Provided by KTH - Royal Institute of Technology
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White Papers
Scheduling Packets for Event-Triggered Control
June 20, 2009, 12:00am PDT
There is a tight interaction between the control architecture and the communication protocols in networked control systems. Periodic time-triggered control loops are natural to use together with a...
Provided by KTH - Royal Institute of Technology
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White Papers
A Cross-Layer Protocol for Wireless Sensor Networks in Control and Automation
October 1, 2009, 12:00am PDT
Control applications over Wireless Sensor Networks (WSNs) require timely, reliable, and energy efficient communications. Cross layer interaction is an essential design paradigm to exploit the...
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White Papers
MAC Protocol Engine for Sensor Networks
August 13, 2009, 12:00am PDT
This paper presents a novel approach for Medium Access Control (MAC) protocol design based on protocol engine. Current way of designing MAC protocols for a specific application is based on two...
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White Papers
CryptoNET: Integrated Secure Workstation
November 1, 2009, 12:00am PDT
In most of the current applications security is usually provided individually. This means that various applications use their own security mechanisms and services, applied only to their own...
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White Papers
Assessment of IT Governance - A Prioritization of Cobit
February 27, 2006, 12:00am PST
A shared view on the definition of IT governance is lacking and practitioners do not use present IT governance frameworks to support their decision-making. This paper presents an Architecture...
Provided by KTH - Royal Institute of Technology
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White Papers
Live Migration of Virtual Machines: Sustaining Active TCP-Sessions
September 3, 2009, 12:00am PDT
Virtualization and the technology associated with it, has attracted quite a lot of attention during the past years. As of 2009, it is estimated that the market for virtualized X86 server solutions...
Provided by KTH - Royal Institute of Technology
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Software
-News finder 1.0 (Mobile)
May 17, 2010, 12:00am PDT
? ? . . , , . [] , , , . . , . [] . [] newsmaster@paran.com . News finder What is the latest live breaking news around the world now? What is the top stories among media? News finder delivers...
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White Papers
Multimedia Messaging Service Components for Web 2.0
February 6, 2008, 12:00am PST
The purpose of this paper is to simplify the exchange (in both directions) of multimedia content between mobile phones and network attached web servers. The solution proposed in this report...
Provided by KTH Royal Institute of Technology
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Software
TV QookTV Channel Talk 2.4 (Mobile)
June 14, 2010, 12:00am PDT
TV TV . TV TV ! [] *** () / (TV) TV 1. : 3G WIFI (TV)2. : , , ( ) (TV)3. : ()4. TV : TV TV (TV)5. : TV ()6. TV : TV (TV)7. : ()8. : (TV) []1. TV . * : TV ( TV ) > Fun&Life > 'TV ' 2. TV TV . TV...
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White Papers
Mobile Payments Through Near Field Communication
September 1, 2009, 12:00am PDT
This paper has been assigned to Stockholm School of Economics. The purpose of this paper has been to give a second opinion regarding the possibilities of m-payments through NFC and the barriers to...
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White Papers
Analysis Of Business Models And Market Perspectives For Open Source Mobile Middleware For Context Aware Applications
June 1, 2009, 12:00am PDT
Open source middleware for context aware mobile applications has attracted the interest of many researchers, operators and vendors, especially in Europe. Under this scope, the analysis of suitable...
Provided by KTH Royal Institute of Technology
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White Papers
An Approach to Network Security Assessment Based on Probalistic Relational Models
March 22, 2010, 12:00am PDT
To assist rational decision making regarding network security improvements, decision makers need to be able to assess weaknesses in existing or potential new systems. This paper presents a model...
Provided by KTH - Royal Institute of Technology
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Software
ucloud for iPad 1.1 (iOS)
January 9, 2011, 12:00am PST
!!ucloud PC (), Personal Cloud Storage . PC ucloud / ucloud ().ucloud .[]- : , ucloud * DOC, XLS, PPT, HWP, PDF, JPG , , - : ucloud MP3 - : ucloud - : ucloud - : , ( )- : ucloud , .Show 20G !...
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Software
Wild Frontier 1.0.1 (Mobile)
January 31, 2011, 12:00am PST
The greatest adventure story, Wild frontier Users sayThis game is awesome! The graphics, the music, the characters I completely love itIt is a beautiful game with a strong battle system, quest...
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Software
WhyKids 1.0 (Mobile)
February 9, 2011, 12:00am PST
Why Kids (/Korean Version) $3.99 $0.99 (2011 29~215) .Why Kids !! ! Why? App !! ! , !!-4,000 Why? App - , Why?< >1. : 15 2. : 3. : 1. Why? App 2. , 3. , , ! 4. Touch & Drag , < > 1. 2. 3. 4. 5. 6....
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White Papers
Institutional And Behavioral Patterns In Advising Small And Medium Sized Firms
September 20, 2006, 12:00am PDT
Although a majority of all Small and Medium Sized Enterprises (SMEs) need advice the preparedness to accept advice among SMEs is often low. In what we call the formal institutionalized advice...
Provided by KTH - Royal Institute of Technology
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White Papers
Network Estimation and Packet Delivery Prediction for Control Over Wireless Mesh Networks
March 28, 2011, 12:00am PDT
Much of the current theory of networked control systems uses simple point-to-point communication models as an abstraction of the underlying network. As a result, the controller has very limited...
Provided by KTH Royal Institute of Technology
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White Papers
Converging an Overlay Network to a Gradient Topology
March 29, 2011, 12:00am PDT
In this paper, the authors investigate the topology convergence problem for the gossip-based Gradient overlay network. In an overlay network where each node has a local utility value, a Gradient...
Provided by KTH - Royal Institute of Technology
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White Papers
Comparing Maintenance Strategies for Overlays
October 1, 2007, 12:00am PDT
In this paper, the authors present an analytical tool for understanding the performance of structured overlay networks under churn based on the master-equation approach of physics. They motivate...
Provided by KTH Royal Institute of Technology
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White Papers
A Proof Carrying Code Framework for Inlined Reference Monitors in Java Bytecode
December 15, 2010, 12:00am PST
The authors propose a light-weight approach for certification of monitor inlining for sequential Java bytecode using proof-carrying code. The goal is to enable the use of monitoring for quality...
Provided by KTH
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White Papers
A Cyber Security Study of a SCADA Energy Management System: Stealthy Deception Attacks on the State Estimator
November 8, 2010, 12:00am PST
The electrical power network is a critical infrastructure in today's society, so its safe and reliable operation is of major concern. State estimators are commonly used in power networks, for...
Provided by KTH Royal Institute of Technology
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White Papers
A Commitment-Consistent Proof of a Shuffle
April 2, 2011, 12:00am PDT
The authors introduce a pre-computation technique that drastically reduces the online computational complexity of mix-nets based on homomorphic cryptosystems. More precisely, the authors show that...
Provided by KTH
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White Papers
Group Message Authentication
November 18, 2010, 12:00am PST
Group signatures is a powerful primitive with many practical applications, allowing a group of parties to share a signature functionality, while protecting the anonymity of the signer. However,...
Provided by KTH Royal Institute of Technology
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White Papers
A Metamodel For Strategic Business And IT Alignment Assessment
March 5, 2006, 12:00am PST
This paper proposes a metamodel based on Jerry N. Luftman's strategic business and Information Technology (IT) alignment assessment approach. It explains how this metamodel is deduced and how it...
Provided by KTH - Royal Institute of Technology
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White Papers
Peak-to-Average Power Ratio Reduction of OFDM Signals Using Pulse Shaping
April 17, 2007, 12:00am PDT
This paper proposes an efficient technique for reducing the PAPR of OFDM signals. The proposed technique is very effective and avoids the use of extra Inverse Fast Fourier Transformations (IFFTs)...
Provided by KTH - Royal Institute of Technology
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White Papers
Cooperative Diversity With Disconnection Constraints and Sleep Discipline for Power Control in Wireless Sensor Networks
January 1, 2011, 12:00am PST
The authors derive a power control policy for a group of sensor nodes that are monitoring a real-time application sensitive to disconnections (outages) of the communication. Specially, they...
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White Papers
Medium Access Control Analytical Modeling and Optimization in Unslotted IEEE 802.15.4 Wireless Sensor Networks
May 4, 2009, 12:00am PDT
Accurate analytical expressions of delay and packet reception probabilities and energy consumption of duty-cycled wireless sensor networks with random Medium Access Control (MAC) are instrumental...
Provided by KTH Royal Institute of Technology
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White Papers
Performance Analysis of GTS Allocation in Beacon Enabled IEEE 802.15.4
May 1, 2009, 12:00am PDT
Time-critical applications for Wireless Sensor Networks (WSNs) are an important class of services supported by the standard IEEE 802.15.4. Control, actuation, and monitoring are all examples of...
Provided by KTH Royal Institute of Technology
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White Papers
Experimental Evaluation of Power Control Algorithms for Wireless Sensor Networks
February 25, 2008, 12:00am PST
The main contribution of this paper is the implementation and experimental evaluation of thee radio power control algorithms for wireless sensor networks. The authors illustrate the necessity of...
Provided by KTH Royal Institute of Technology
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White Papers
Analytical Modeling of IEEE 802.15.4 for Multi-Hop Networks With Heterogeneous Traffic and Hidden Terminals
December 29, 2010, 12:00am PST
IEEE 802.15.4 multi-hop wireless networks are an important communication infrastructure for many applications, including industrial control, home automation, and smart grids. Existing analysis of...
Provided by KTH Royal Institute of Technology
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White Papers
On Power Control for Wireless Sensor Networks: System Model, Middleware Component and Experimental Evaluation
January 1, 2011, 12:00am PST
In this paper, the authors investigate strategies for radio power control for wireless sensor networks that guarantee a desired packet error probability. Efficient power control algorithms are of...
Provided by KTH Royal Institute of Technology
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White Papers
Performance Analysis of Collaborative Spatio-Temporal Processing for Wireless Sensor Networks
January 1, 2011, 12:00am PST
Spatio-Temporal Processing (STP) is a control technique to increase the quality of the received signals in wireless networks. Outage events have a strong influence not only on the performance of...
Provided by KTH
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White Papers
Road Grade Estimation Results Using Sensor and Data Fusion
August 7, 2007, 12:00am PDT
Advanced driver assistance systems for heavy duty vehicles, such as look-ahead cruise and gearshift controllers, rely on high quality map data. Current digital maps do not offer the required level...
Provided by KTH Royal Institute of Technology
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White Papers
On Security Indices for State Estimators in Power Networks
December 29, 2010, 12:00am PST
In this paper, the authors study stealthy false-data attacks against state estimators in power networks. The focus is on applications in SCADA (Supervisory Control And Data Acquisition) systems...
Provided by KTH Royal Institute of Technology
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White Papers
Control Over a Hybrid MAC Wireless Network
May 22, 2010, 12:00am PDT
Wireless Sensor Networks and Control Systems are an essential part of the Smart Grid. The authors consider the problem of performing control over large complex networked systems with packet drops....
Provided by KTH Royal Institute of Technology
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White Papers
LQG and Medium Access Control
July 12, 2009, 12:00am PDT
The communication channel is a shared resource in networked control systems, and channel access at every instant cannot be guaranteed. In this paper, the authors propose a novel architecture for...
Provided by KTH - Royal Institute of Technology
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White Papers
Experimental Validation of a Localization System Based on a Heterogeneous Sensor Network
May 29, 2009, 12:00am PDT
The experimental implementation and validation of a localization system based on a heterogeneous sensor network is described. The sensor network consists of ultrasound ranging sensors and web...
Provided by KTH Royal Institute of Technology
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White Papers
Modular Co-Design of Controllers and Transmission Schedules in WirelessHART
December 29, 2011, 12:00am PST
The authors consider the joint design of transmission schedules and controllers for networked control loops that use WirelessHART communication for sensor and actuator data. By parameterizing the...
Provided by KTH Royal Institute of Technology
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White Papers
Minimum-Energy Packet Forwarding Over Lossy Networks Under Deadline and Reliability Constraints
March 1, 2012, 12:00am PST
This paper studies minimum-energy packet forwarding over multi-hop lossy networks under deadline and reliability constraints. The authors assume a routing topology in the form of a directed graph...
Provided by KTH Royal Institute of Technology
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White Papers
Energy-Efficient Deadline-Constrained Maximum Reliability Forwarding in Lossy Networks
April 20, 2012, 12:00am PDT
This paper studies the problem of optimal forwarding for reliable and energy-efficient real-time communication over lossy networks. The authors impose a strict per-packet latency bound and develop...
Provided by KTH Royal Institute of Technology
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Software
pudding.to 1.1.0 (iOS)
February 14, 2012, 12:00am PST
pudding.to is the most innovative photo sharing app ever! Pudding.to Photo Festival Event, Recruiting Participants Now!Participate in Photo Festival to receive Lomography camera and photo book!...
Provided by KTH
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Software
Korean Celeb Face Match 1.1.1 (iOS)
July 6, 2011, 12:00am PDT
Selected by Appstore, No.3 free Korean app in history! Korean Celebs love this app! Try to find out who is the best resemble Korean celeb with you!Feature-Works with iPhone 3Gs, 4/4S. iOS 4.1 or...
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White Papers
Experiences From the Development of a Two-Year International Master Program in Wireless Systems
April 27, 2007, 12:00am PDT
This paper describes some experiences with the development an international master program in wireless systems technology at the Royal Institute of Technology in Stockholm, Sweden. Specifically,...
Provided by KTH Royal Institute of Technology
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White Papers
Implementation and Evaluation of A-GAP: Adaptive Monitoring With Controllable Accuracy
August 31, 2007, 12:00am PDT
The authors report on the implementation and prototype evaluation of A-GAP, a protocol for continuous monitoring of network state variables, which are computed from device counters using...
Provided by KTH Royal Institute of Technology
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White Papers
State-of-The Art and Future In-Car Navigation Systems - A Survey
January 1, 2012, 12:00am PST
A survey of the information sources and information fusion technologies used in the current in-car navigation systems is presented. The pros and cons of the four commonly used information sources...
Provided by KTH - Royal Institute of Technology
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White Papers
Statistically Robust Design of Linear MIMO Transceivers
January 25, 2008, 12:00am PST
The treatment of Channel State Information (CSI) is critical in the design of MIMO systems. Accurate CSI at the transmitter is often not possible or may require high feedback rates. Herein, the...
Provided by KTH - Royal Institute of Technology
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White Papers
Inter and Intra-Site Correlation of Large Scale Parameters From Macro Cellular Measurements at 1800MHz
August 28, 2007, 12:00am PDT
Herein, the inter- and intra-site correlation properties of shadow fading and power-weighted angular spread at both the mobile station and the base station are studied utilizing narrow band...
Provided by KTH - Royal Institute of Technology
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White Papers
Robust MAC MIMO Transceiver Design With Partial CSIT and CSIR
December 3, 2007, 12:00am PST
In practical wireless systems, the design of linear MIMO transceivers should be robust to imperfect Channel State Information (CSI), especially in multiuser systems where accurate CSI is difficult...
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White Papers
Estimation of Kronecker Structured Channel Covariances Using Training Data
June 14, 2007, 12:00am PDT
The problem of estimating second order statistics for MIMO channels is treated. It is assumed that the so called Kronecker model holds. This implies that the channel covariance is the Kronecker...
Provided by KTH - Royal Institute of Technology
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White Papers
Correlation Properties of Large Scale Fading Based on Indoor Measurements
January 3, 2007, 12:00am PST
Statistical channel models are attractive for their simplicity but sometimes lack in precision. In order to improve modelling accuracy, statistical model parameters, which are dependent on the...
Provided by KTH - Royal Institute of Technology
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White Papers
User Selection Schemes in Multiple Antenna Broadcast Channels With Guaranteed Performance
April 12, 2007, 12:00am PDT
Recently, user selection algorithms in combination with linear precoding have been proposed that achieve the same scaling as the sum capacity of the MIMO BC. In this paper, the authors study the...
Provided by KTH - Royal Institute of Technology
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White Papers
Ergodic Capacity Achieving Transmit Strategy in MIMO Systems With Statistical and Short-Term Norm CSI
January 17, 2007, 12:00am PST
The type and quality of the channel state information at the transmitter of a fading multiple-input multiple-output system greatly affects the ergodic capacity of the wireless link. In order to...
Provided by KTH - Royal Institute of Technology
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White Papers
Model Based Dynamic Characterization of Analog-Digital-Converters at Radio Frequency
December 14, 2006, 12:00am PST
A dynamic characterization of analog-digital converter Integral Non-Linearity (INL) is considered. When using a plurality of test frequencies in the measurement set-up, the dynamic errors of the...
Provided by KTH - Royal Institute of Technology
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White Papers
On Identification of Cascade Systems
September 25, 2007, 12:00am PDT
The objective of this contribution is to discuss some aspects of system identification of cascade systems. Models of such systems are important in for example cascade control applications. The...
Provided by KTH - Royal Institute of Technology
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White Papers
Analysis of Networked Estimation Under Contention-Based Medium Access
October 2, 2007, 12:00am PDT
The authors treat a problem in networked estimation where the focus is on sampling and transmitting measurements of the plant over a shared medium. The object is to choose the sampling rate at the...
Provided by KTH - Royal Institute of Technology
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White Papers
Power and Rate Control Outage Based in CDMA Wireless Networks Under MAI and Heterogeneous Traffic Sources
January 1, 2011, 12:00am PST
The authors characterize the maximum throughput achievable for the up-link of a power-controlled WCDMA wireless system with variable spreading factor. Their system model includes multi access...
Provided by KTH - Royal Institute of Technology
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White Papers
On Rate Allocation for Multiple Plants in a Networked Control System
March 1, 2012, 12:00am PST
The problem of allocating communication resources to multiple plants in a networked control system is investigated. In the presence of a shared communication medium, a total transmission rate...
Provided by KTH - Royal Institute of Technology
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White Papers
Optimal Input Design for Identification of Non-Linear Systems: Learning From the Linear Case
October 11, 2006, 12:00am PDT
For linear time-invariant systems, the input influences the accuracy of identified parameters only through its second order properties and its cross-correlation with the noise. A wide range of...
Provided by KTH - Royal Institute of Technology
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White Papers
Adaptive Input Design for ARX Systems
October 11, 2006, 12:00am PDT
A key problem in optimal input design is that the solution depends on system parameters to be identified. In this contribution, the authors provide formal results for convergence and asymptotic...
Provided by KTH - Royal Institute of Technology
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White Papers
Approximation for a Sum of On-Off Log-Normal Processes With Wireless Applications
January 1, 2012, 12:00am PST
In this paper, a log-normal approximation is proposed for the sum of log-normal processes weighted by binary processes. The analytical approach moves from the method early proposed by Wilkinson...
Provided by KTH - Royal Institute of Technology
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White Papers
Monitoring Flow Aggregates With Controllable Accuracy
August 9, 2007, 12:00am PDT
In this paper, the authors show the feasibility of real-time flow monitoring with controllable accuracy in today's IP networks. Their approach is based on Netflow and A-GAP. A-GAP is a protocol...
Provided by KTH Royal Institute of Technology
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White Papers
Traffic Engineering and Routing in IP Networks With Centralized Control
November 21, 2007, 12:00am PST
There have been research initiatives in centralized control recently, which advocate that the control of an Autonomous System (AS) should be performed in a centralized fashion. In this paper, the...
Provided by KTH Royal Institute of Technology
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White Papers
Queueing Behavior and Packet Delays in Network Processor Systems
August 15, 2007, 12:00am PDT
Network processor systems provide the performance of ASICs combined with the programmability of general-purpose processors. One of the main challenges in designing these systems is the memory...
Provided by KTH - Royal Institute of Technology
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White Papers
Optimal Resource Sharing for Integration of Unicast and Multicast Data on TDM Radio Channels
March 15, 2007, 12:00am PDT
Future integration of multicast and unicast data on time-slotted radio channels will require efficient resource sharing mechanisms. These mechanisms need to be optimized to provide the best...
Provided by KTH Royal Institute of Technology
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White Papers
Robust Monitoring of Network-Wide Aggregates Through Gossiping
January 31, 2007, 12:00am PST
The authors examine the use of gossip protocols for continuous monitoring of network-wide aggregates. Aggregates are computed from local management variables using functions such as AVERAGE, MIN,...
Provided by KTH Royal Institute of Technology
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White Papers
Joint Encoder - Controller Design for Feedback Control Over Noisy Channels
August 31, 2007, 12:00am PDT
The authors study a closed-loop control system with feedback transmitted over a noisy discrete memoryless channel. They propose a joint design of the sensor measurement quantization, protection...
Provided by KTH Royal Institute of Technology
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White Papers
Dimension Expansion Relaying for Slow Fading Channels Based on Hybrid Digital-Analog Source-Channel Coding
November 27, 2007, 12:00am PST
Hybrid digital - analog coding schemes for dimension compression/expansion have been proposed in source - channel coding to increase the robustness toward channel mismatch, in the absence of...
Provided by KTH - Royal Institute of Technology
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White Papers
System Quality Analysis With Extended Influence Diagrams
December 19, 2006, 12:00am PST
Making major changes in enterprise information systems, such as large IT-investments, often have a significant impact on business operations. Moreover, when deliberating which IT-changes to make,...
Provided by KTH Royal Institute of Technology
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White Papers
A Framework for Assessing Business Value of Service Oriented Architectures
May 8, 2007, 12:00am PDT
This paper presents a framework used for analyzing decisions regarding implementations of service oriented architectures. The framework assesses the business value of SOA by measuring the...
Provided by KTH - Royal Institute of Technology
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White Papers
In Search of a Unified Theory of Software Engineering
June 7, 2007, 12:00am PDT
Highly successful scientific disciplines have at least one common denominator; they have developed unified theories that span a large set of phenomena within the discipline. The discipline of...
Provided by KTH Royal Institute of Technology
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White Papers
Methods and Bounds for Antenna Array Coupling Matrix Estimation
September 28, 2006, 12:00am PDT
A novel method is proposed for estimation of the mutual coupling matrix of an antenna array. The method extends previous work by incorporating an unknown phase center and the element factor...
Provided by KTH Royal Institute of Technology
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White Papers
On Optimal System Design for Feedback Control Over Noisy Channels
June 13, 2007, 12:00am PDT
The authors study a closed-loop multivariable control system with sensor feedback transmitted over a discrete noisy channel. For this problem, they propose a joint design of the state measurement...
Provided by KTH Royal Institute of Technology
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White Papers
EXIT Functions for Randomly Punctured Systematic Codes
February 14, 2008, 12:00am PST
In this paper, the EXtrinsic Information Transfer (EXIT) functions of Randomly Punctured Systematic Codes (RPSCs) are analyzed. The authors consider the systematic encoder to consist of a...
Provided by KTH Royal Institute of Technology
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White Papers
Modular Design of Jointly Optimal Controllers and Forwarding Policies for Wireless Control
April 17, 2012, 12:00am PDT
The authors consider the joint design of forwarding policies and controllers for wireless control loops where sensor measurements are sent over an unreliable multi-hop wireless network to the...
Provided by KTH Royal Institute of Technology
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White Papers
Identity-Based Authentication and Access Control in Wireless Sensor Networks
March 1, 2012, 12:00am PST
The application and usage of the wireless sensor network is rapidly growing. Wireless sensor networks are normally deployed into the unattended environment where the intended user can get access...
Provided by KTH Royal Institute of Technology
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White Papers
Sphere Decoding Complexity Exponent for Full Rate Codes Over the Quasi-Static MIMO Channel
January 1, 2011, 12:00am PST
In the setting of quasi-static Multiple-Input Multiple-Output (MIMO) channels, the authors consider the high Signal-to-Noise Ratio (SNR) asymptotic complexity required by the Sphere Decoding (SD)...
Provided by KTH - Royal Institute of Technology
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White Papers
A List of Maximum Period NLFSRs
March 27, 2012, 12:00am PDT
Non-Linear Feedback Shift Registers (NLFSRs) are a generalization of Linear Feedback Shift Registers (LFSRs) in which a current state is a nonlinear function of the previous state. While the...
Provided by KTH Royal Institute of Technology
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