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Middle East Technical University
(24 results)-
White Papers
A Review on Data Mining and Continuous Optimization Applications in Computational Biology and Medicine
April 17, 2009, 12:00am PDT
An emerging research area in computational biology and biotechnology is devoted to mathematical modeling and prediction of gene-expression patterns; it nowadays requests mathematics to deeply...
Provided by Middle East Technical University
-
White Papers
Quality of Service and Security Control for Cluster-Based Wireless Sensor Networks
April 16, 2009, 12:00am PDT
This study investigates security and Quality of Service (QoS) issues in cluster-based Wireless Sensor Networks (WSN). The QoS definition consists of four attributes, which are spatial resolution,...
Provided by Middle East Technical University
-
White Papers
Pushing the Limits of Address Based Authentication: How to Avoid MAC Address Spoofing in Wireless LANs
June 20, 2009, 12:00am PDT
It is well-known that in wireless local area networks, authenticating nodes by their MAC addresses is not secure since it is very easy for an attacker to learn one of the authorized addresses and...
Provided by Middle East Technical University
-
White Papers
Emerging Market Sovereign Spreads, Global Financial Conditions And U.S. Macroeconomic News
March 16, 2008, 12:00am PDT
This paper investigates the impact of global financial conditions, US macroeconomic news and domestic macroeconomic fundamentals on the evolution of EMBI spreads for a panel of 18 Emerging Market...
Provided by Middle East Technical University
-
White Papers
Wireless Network Simplification: The Gaussian N-Relay Diamond Network
March 10, 2011, 12:00am PST
The authors consider the Gaussian N-relay diamond network, where a source wants to communicate to a destination node through a layer of N-relay nodes. They investigate the following question: What...
Provided by Middle East Technical University
-
White Papers
Reverse SSL: Improved Server Performance and DoS Resistance for SSL Handshakes
January 1, 2011, 12:00am PST
Common occurrence of server overload and the threat of Denial-of-Service (DoS) attacks makes highly desirable to improve the performance and DoS resistance of SSL handshakes. In this paper, the...
Provided by Middle East Technical University
-
White Papers
User Awareness Measurement Through Social Engineering
December 1, 2010, 12:00am PST
TUBITAK National Research Institute of Electronics and Cryptology (UEKAE) Department of Information Systems Security makes social engineering attacks to Turkish public agencies within the frame of...
Provided by Middle East Technical University
-
White Papers
Global Dynamics, Domestic Coalitions And A Reactive State: Major Policy Shifts In Post-War Turkish Economic Development
September 1, 2007, 12:00am PDT
The main objective of this paper is to propose an analytical framework to explain the major policy shifts that has characterized post-war Turkish economic development; divided into four phases,...
Provided by Middle East Technical University
-
White Papers
Cognitive Radio Sensor Networks
January 12, 2009, 12:00am PST
The increasing demand for wireless communication introduces efficient spectrum utilization challenge. To address this challenge, cognitive radio has emerged as the key technology, which enables...
Provided by Middle East Technical University
-
White Papers
PADRE: Modulated Backscattering-Based PAssive Data REtrieval in Wireless Sensor Networks
January 5, 2009, 12:00am PST
The most difficult challenge for the design of Wireless Sensor Networks (WSN) is to maintain long network lifetimes since the sensor nodes are severely energy-constrained. Traditional WSN assumes...
Provided by Middle East Technical University
-
White Papers
A Report on Current Advancements in Integration of IEEE 802.16 and IEEE 802.11 Networks
March 16, 2009, 12:00am PDT
IEEE 802.11 and IEEE 802.16 are two technologies that can provide high data rates, but they both have restrictions on their coverage area. The fact that 802.11 is only able to cover a limited area...
Provided by Middle East Technical University
-
White Papers
Probability of Full-Diversity for Simple Coded and Rotated Multidimensional Constellation Systems
June 17, 2009, 12:00am PDT
The case of rotation, in use together with coding in a channel with B fading blocks, is analyzed in terms of diversity properties of the coded systems with multi-dimensional rotated constellations...
Provided by Middle East Technical University
-
White Papers
Turbo-Like Codes Over Block-Fading and Time-Varying Narrowband Fading Channels
January 15, 2009, 12:00am PST
The authors' main goal in this paper is to construct codes that can perform close to information-theoretic limits in time-varying channels. For this purpose, a new turbo-like code is first...
Provided by Middle East Technical University
-
White Papers
Iterative Decision Feedback Equalization and Decoding for Rotated Multidimensional Constellations in Block Fading Channels
January 6, 2009, 12:00am PST
It is known that rotated multidimensional constellations can be used effectively to achieve full-rate and full-diversity transmission in block fading channels. However, the optimal decoding...
Provided by Middle East Technical University
-
White Papers
Subcarrier Allocation in OFDMA With Time Varying Channel and Packet Arrivals
February 3, 2009, 12:00am PST
This paper considers the design of efficient low-complexity algorithms for dynamic allocation of subcarriers to users in a multiuser transmitter using Orthogonal Frequency Division. The effects...
Provided by Middle East Technical University
-
White Papers
On the Carrier Frequency Offset Estimation for Frequency Hopping Burst Mode Mobile Radio
August 12, 2010, 12:00am PDT
In this paper, the authors evaluate the Cramer-Rao Bounds (CRB) for the estimation of the Carrier Frequency Offset (CFO) for general QAM modulations with no knowledge of the transmitted sequence...
Provided by Middle East Technical University
-
White Papers
Cut-Off Rate Based Outage Probability Analysis of Frequency Hopping Mobile Radio Under Jamming Conditions
August 11, 2010, 12:00am PDT
This paper deals with the achievable spectral efficiency and outage analysis of short burst Frequency Hopping (FH) mobile radios under heavy jamming scenarios. With the use of outage probability...
Provided by Middle East Technical University
-
White Papers
Low-Complexity Iterative Channel Estimation and Tracking for Time-Varying Multi-Antenna Systems
August 4, 2009, 12:00am PDT
The iterative channel estimation and tracking problem is considered for time-varying frequency-flat fading Multi-Input Multi-Output (MIMO) systems. In order to jointly estimate and track the...
Provided by Middle East Technical University
-
White Papers
Iterative Frequency Domain Equalization for Single-Carrier Wideband MIMO Channels
June 19, 2009, 12:00am PDT
Single Carrier Frequency Domain Equalization (SCFDE) is receiving considerable attention recently due to its comparable complexity and performance with OFDM. In this paper, an iterative SC-FDE...
Provided by Middle East Technical University
-
White Papers
Joint Channel Estimation and Decoding With Low-Complexity Iterative Structures in Time-Varying Fading Channels
August 4, 2009, 12:00am PDT
A low-complexity Iterative Channel Estimation (ICE) algorithm is proposed with the promise of improved error performance. The new algorithm operates the LMS filter both in the forward and the...
Provided by Middle East Technical University
-
White Papers
A Survey of Network Simulators Supporting Wireless Networks
October 22, 2008, 12:00am PDT
This paper contains a survey about network simulators supporting wireless networks. It aims to find a wireless network simulator which would help researchers develop and analyze simulation models...
Provided by Middle East Technical University
-
White Papers
Optimal Buffer Partitioning on a Multiuser Wireless Link
April 22, 2010, 12:00am PDT
Memory is a limited resource in communication devices. While communication, computation and memory capabilities continuously increase, with the advance of standards and systems such as 3G and...
Provided by Middle East Technical University
-
White Papers
Governing Information Security in Conjunction With Cobit and ISO 27001
July 1, 2011, 12:00am PDT
In this paper, after giving a brief definition of Information Security Management Systems (ISMS), ISO 27001, IT governance and COBIT, pros and cons of implementing only COBIT, implementing only...
Provided by Middle East Technical University
-
White Papers
Practical Wireless Network Coding and Decoding Methods for Multiple Unicast Transmissions
December 14, 2011, 12:00am PST
The authors propose a simple yet effective wireless network coding and decoding technique. It utilizes spatial diversity through cooperation between nodes which carry out distributed encoding...
Provided by Middle East Technical University
-
White Papers
Practical Wireless Network Coding and Decoding Methods for Multiple Unicast Transmissions
December 14, 2011, 12:00am PST
The authors propose a simple yet effective wireless network coding and decoding technique. It utilizes spatial diversity through cooperation between nodes which carry out distributed encoding...
Provided by Middle East Technical University
-
White Papers
Governing Information Security in Conjunction With Cobit and ISO 27001
July 1, 2011, 12:00am PDT
In this paper, after giving a brief definition of Information Security Management Systems (ISMS), ISO 27001, IT governance and COBIT, pros and cons of implementing only COBIT, implementing only...
Provided by Middle East Technical University
-
White Papers
Optimal Buffer Partitioning on a Multiuser Wireless Link
April 22, 2010, 12:00am PDT
Memory is a limited resource in communication devices. While communication, computation and memory capabilities continuously increase, with the advance of standards and systems such as 3G and...
Provided by Middle East Technical University
-
White Papers
A Survey of Network Simulators Supporting Wireless Networks
October 22, 2008, 12:00am PDT
This paper contains a survey about network simulators supporting wireless networks. It aims to find a wireless network simulator which would help researchers develop and analyze simulation models...
Provided by Middle East Technical University
-
White Papers
Joint Channel Estimation and Decoding With Low-Complexity Iterative Structures in Time-Varying Fading Channels
August 4, 2009, 12:00am PDT
A low-complexity Iterative Channel Estimation (ICE) algorithm is proposed with the promise of improved error performance. The new algorithm operates the LMS filter both in the forward and the...
Provided by Middle East Technical University
-
White Papers
Iterative Frequency Domain Equalization for Single-Carrier Wideband MIMO Channels
June 19, 2009, 12:00am PDT
Single Carrier Frequency Domain Equalization (SCFDE) is receiving considerable attention recently due to its comparable complexity and performance with OFDM. In this paper, an iterative SC-FDE...
Provided by Middle East Technical University
-
White Papers
Low-Complexity Iterative Channel Estimation and Tracking for Time-Varying Multi-Antenna Systems
August 4, 2009, 12:00am PDT
The iterative channel estimation and tracking problem is considered for time-varying frequency-flat fading Multi-Input Multi-Output (MIMO) systems. In order to jointly estimate and track the...
Provided by Middle East Technical University
-
White Papers
Cut-Off Rate Based Outage Probability Analysis of Frequency Hopping Mobile Radio Under Jamming Conditions
August 11, 2010, 12:00am PDT
This paper deals with the achievable spectral efficiency and outage analysis of short burst Frequency Hopping (FH) mobile radios under heavy jamming scenarios. With the use of outage probability...
Provided by Middle East Technical University
-
White Papers
On the Carrier Frequency Offset Estimation for Frequency Hopping Burst Mode Mobile Radio
August 12, 2010, 12:00am PDT
In this paper, the authors evaluate the Cramer-Rao Bounds (CRB) for the estimation of the Carrier Frequency Offset (CFO) for general QAM modulations with no knowledge of the transmitted sequence...
Provided by Middle East Technical University
-
White Papers
Subcarrier Allocation in OFDMA With Time Varying Channel and Packet Arrivals
February 3, 2009, 12:00am PST
This paper considers the design of efficient low-complexity algorithms for dynamic allocation of subcarriers to users in a multiuser transmitter using Orthogonal Frequency Division. The effects...
Provided by Middle East Technical University
-
White Papers
Iterative Decision Feedback Equalization and Decoding for Rotated Multidimensional Constellations in Block Fading Channels
January 6, 2009, 12:00am PST
It is known that rotated multidimensional constellations can be used effectively to achieve full-rate and full-diversity transmission in block fading channels. However, the optimal decoding...
Provided by Middle East Technical University
-
White Papers
Turbo-Like Codes Over Block-Fading and Time-Varying Narrowband Fading Channels
January 15, 2009, 12:00am PST
The authors' main goal in this paper is to construct codes that can perform close to information-theoretic limits in time-varying channels. For this purpose, a new turbo-like code is first...
Provided by Middle East Technical University
-
White Papers
Probability of Full-Diversity for Simple Coded and Rotated Multidimensional Constellation Systems
June 17, 2009, 12:00am PDT
The case of rotation, in use together with coding in a channel with B fading blocks, is analyzed in terms of diversity properties of the coded systems with multi-dimensional rotated constellations...
Provided by Middle East Technical University
-
White Papers
A Report on Current Advancements in Integration of IEEE 802.16 and IEEE 802.11 Networks
March 16, 2009, 12:00am PDT
IEEE 802.11 and IEEE 802.16 are two technologies that can provide high data rates, but they both have restrictions on their coverage area. The fact that 802.11 is only able to cover a limited area...
Provided by Middle East Technical University
-
White Papers
PADRE: Modulated Backscattering-Based PAssive Data REtrieval in Wireless Sensor Networks
January 5, 2009, 12:00am PST
The most difficult challenge for the design of Wireless Sensor Networks (WSN) is to maintain long network lifetimes since the sensor nodes are severely energy-constrained. Traditional WSN assumes...
Provided by Middle East Technical University
-
White Papers
Cognitive Radio Sensor Networks
January 12, 2009, 12:00am PST
The increasing demand for wireless communication introduces efficient spectrum utilization challenge. To address this challenge, cognitive radio has emerged as the key technology, which enables...
Provided by Middle East Technical University
-
White Papers
Global Dynamics, Domestic Coalitions And A Reactive State: Major Policy Shifts In Post-War Turkish Economic Development
September 1, 2007, 12:00am PDT
The main objective of this paper is to propose an analytical framework to explain the major policy shifts that has characterized post-war Turkish economic development; divided into four phases,...
Provided by Middle East Technical University
-
White Papers
User Awareness Measurement Through Social Engineering
December 1, 2010, 12:00am PST
TUBITAK National Research Institute of Electronics and Cryptology (UEKAE) Department of Information Systems Security makes social engineering attacks to Turkish public agencies within the frame of...
Provided by Middle East Technical University
-
White Papers
Reverse SSL: Improved Server Performance and DoS Resistance for SSL Handshakes
January 1, 2011, 12:00am PST
Common occurrence of server overload and the threat of Denial-of-Service (DoS) attacks makes highly desirable to improve the performance and DoS resistance of SSL handshakes. In this paper, the...
Provided by Middle East Technical University
-
White Papers
Wireless Network Simplification: The Gaussian N-Relay Diamond Network
March 10, 2011, 12:00am PST
The authors consider the Gaussian N-relay diamond network, where a source wants to communicate to a destination node through a layer of N-relay nodes. They investigate the following question: What...
Provided by Middle East Technical University
-
White Papers
Emerging Market Sovereign Spreads, Global Financial Conditions And U.S. Macroeconomic News
March 16, 2008, 12:00am PDT
This paper investigates the impact of global financial conditions, US macroeconomic news and domestic macroeconomic fundamentals on the evolution of EMBI spreads for a panel of 18 Emerging Market...
Provided by Middle East Technical University
-
White Papers
Pushing the Limits of Address Based Authentication: How to Avoid MAC Address Spoofing in Wireless LANs
June 20, 2009, 12:00am PDT
It is well-known that in wireless local area networks, authenticating nodes by their MAC addresses is not secure since it is very easy for an attacker to learn one of the authorized addresses and...
Provided by Middle East Technical University
-
White Papers
Quality of Service and Security Control for Cluster-Based Wireless Sensor Networks
April 16, 2009, 12:00am PDT
This study investigates security and Quality of Service (QoS) issues in cluster-based Wireless Sensor Networks (WSN). The QoS definition consists of four attributes, which are spatial resolution,...
Provided by Middle East Technical University
-
White Papers
A Review on Data Mining and Continuous Optimization Applications in Computational Biology and Medicine
April 17, 2009, 12:00am PDT
An emerging research area in computational biology and biotechnology is devoted to mathematical modeling and prediction of gene-expression patterns; it nowadays requests mathematics to deeply...
Provided by Middle East Technical University
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