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Tennessee Technological University
(36 results)-
White Papers
KVM on Clusters: Tackling the Disk I/O Bottleneck for HPC Virtualization
January 29, 2009, 12:00am PST
Extending virtualization technology into high-performance, cluster platforms generates exciting new possibilities. For example, runtime environments can be extended and tailored to each user or...
Provided by Tennessee Technological University
-
White Papers
A Compressed Sensing Based Ultra-Wideband Communication System
April 14, 2009, 12:00am PDT
Sampling is the bottleneck for Ultra-WideBand (UWB) communication. The major contribution is to exploit the channel itself as part of compressed sensing, through waveform-based pre-coding at the...
Provided by Tennessee Technological University
-
White Papers
Spectrum Sensing Based on Blindly Learned Signal Feature
February 18, 2011, 12:00am PST
Spectrum sensing is the major challenge in the Cognitive Radio (CR). The authors propose to learn local feature and use it as the prior knowledge to improve the detection performance. They define...
Provided by Tennessee Technological University
-
White Papers
Modified Orthogonal Matching Pursuit Algorithm for Cognitive Radio Wideband Spectrum Sensing
February 14, 2011, 12:00am PST
Sampling rate is the bottleneck for spectrum sensing over multi-GHz bandwidth. Recent progress in Compressed Sensing (CS) initialized several sub-Nyquist rate approaches to overcome the problem....
Provided by Tennessee Technological University
-
White Papers
Evaluation of Data Dissemination Methods in Wireless Sensor Networks
May 14, 2008, 12:00am PDT
Wireless Sensor Network is a field that is growing in importance with every passing day. With applications ranging from military to simple habitat monitoring, sensor networks offer a vast...
Provided by Tennessee Technological University
-
White Papers
60-GHzMillimeter-Wave Radio: Principle, Technology, and New Results
September 14, 2006, 12:00am PDT
The worldwide opening of a massive amount of unlicensed spectra around 60 GHz has triggered great interest in developing affordable 60-GHz radios. This interest has been catalyzed by recent...
Provided by Tennessee Technological University
-
White Papers
Towards A Large-Scale Cognitive Radio Network: Testbed, Intensive Computing, Frequency Agility, and Security
July 7, 2011, 12:00am PDT
Cognitive Radio (CR) is a promising technique for improving the efficiency of utilizing the precious radio spectrum. A Cognitive Radio Network (CRN) testbed not only can verify concepts,...
Provided by Tennessee Technological University
-
White Papers
Spectrum Sensing in Cognitive Radio With Subspace Matching
October 28, 2011, 12:00am PDT
Spectrum sensing has been put forward to make more efficient use of scarce radio frequency spectrum. The leading eigenvector of the sample covariance matrix has been applied to spectrum sensing...
Provided by Tennessee Technological University
-
White Papers
Spectrum Sensing in Cognitive Radio With Robust Principal Component Analysis
October 28, 2011, 12:00am PDT
Spectrum sensing is a cornerstone in cognitive radio. Covariance matrix based method has been widely used in spectrum sensing. As is well-known that the covariance matrix of white noise is...
Provided by Tennessee Technological University
-
White Papers
Cognitive Radio Network as Wireless Sensor Network (III): Passive Target Intrusion Detection and Experimental Demonstration
November 8, 2011, 12:00am PST
A Cognitive Radio Network (CRN) based Wireless Sensor Network (WSN), as an extension of CRN, is explored for Radio Frequency (RF) passive target intrusion detection. Compared to a cheap WSN, the...
Provided by Tennessee Technological University
-
White Papers
Target Detection With Linear and Kernel Subspaces Matching in the Presence of Strong Clutter
November 11, 2011, 12:00am PST
This paper proposes potential approaches to detect the weak target in the presence of strong disturbance. The disturbance consists of strong clutter and white Gaussian noise. The target and...
Provided by Tennessee Technological University
-
White Papers
Target Signal Detection With Function of Covariance Matrices in Clutter Environment
November 9, 2011, 12:00am PST
Clutter has a strong interference on target signal detection. Different statistical model should be applied to specific situation. In this paper, the authors propose a function of covariance...
Provided by Tennessee Technological University
-
White Papers
Towards A Real-Time UWB MIMO Testbed for Sensing and Communications
February 8, 2011, 12:00am PST
This paper reports a research testbed of real-time Ultra-WideBand (UWB) Multiple-Input Multiple-Output (MIMO) radio. In the receiver design, the UWB MIMO receiver supports up to eight channels,...
Provided by Tennessee Technological University
-
White Papers
Cooperative Spectrum Sensing Using Q-Learning With Experimental Validation
February 8, 2011, 12:00am PST
Spectrum sensing detects the availability of the radio frequency spectrum and it is essential to cognitive radio. Cooperative spectrum sensing conducted among multiple secondary users has the...
Provided by Tennessee Technological University
-
White Papers
Building a Cognitive Radio Network Testbed
February 8, 2011, 12:00am PST
Cognitive radio has been put forward to make efficient use of scarce radio frequency spectrum. A testbed for cognitive radio can not only verify concepts, algorithms, and protocols, but also dig...
Provided by Tennessee Technological University
-
White Papers
Q-Learning Based Bidding Algorithm for Spectrum Auction in Cognitive Radio
February 8, 2011, 12:00am PST
Cognitive radio has been put forward to make efficient use of scarce radio frequency spectrum. Once available frequency bands have been detected using spectrum sensing algorithms, spectrum auction...
Provided by Tennessee Technological University
-
White Papers
Channel State Prediction in Cognitive Radio, Part I: Response Delays in Practical Hardware Platforms
February 1, 2011, 12:00am PST
Cognitive radio has been put forward to make efficient use of scarce radio frequency spectrum. Spectrum sensing is the cornerstone of cognitive radio. As a part of the effort toward building a...
Provided by Tennessee Technological University
-
White Papers
Channel State Prediction in Cognitive Radio, Part II: Single-User Prediction
February 1, 2011, 12:00am PST
The response delay has a negative impact on the accuracy of spectrum sensing, which is the cornerstone of cognitive radio. In this paper, single-user prediction of channel state is proposed to...
Provided by Tennessee Technological University
-
White Papers
Phase Reconstruction Using Machine Learning For Wireless Tomography
November 5, 2010, 12:00am PDT
This is the following paper in a series on a new initiative of wireless tomography. The goal is to combine two areas: wireless communication and radio tomography. This paper primarily focuses on...
Provided by Tennessee Technological University
-
White Papers
FPGA Based UWB MISO Time-Reversal System Design and Implementation
June 14, 2010, 12:00am PDT
In this paper, a testbed design and implementation of Ultra-WideBand (UWB) Multiple-Input Single-Output (MISO) time-reversal system are presented. The implementation is based on Field Programmable...
Provided by Tennessee Technological University
-
White Papers
Wireless Tomography, Part III: Compressed Sensing for Ultra-Wideband Signals
July 13, 2010, 12:00am PDT
Wireless tomography is related to wireless communications in that it requires the channel recovery between different waveforms at transmit and receive, as well as Multiple-Input Multiple-Output...
Provided by Tennessee Technological University
-
White Papers
UWB Time Reversal: From Theory to Practice
August 17, 2010, 12:00am PDT
This paper discusses the theory behind Ultra-WideBand (UWB) transmit waveform design, and reports a proof-of-concept UWB radio testbed with waveform level precoding. Unlike a narrow-band channel,...
Provided by Tennessee Technological University
-
White Papers
Wireless Tomography, Part II: A System Engineering Approach
July 23, 2010, 12:00am PDT
This is the second paper in a series on a new initiative of wireless tomography. The goal is to combine two areas: wireless communication and radio tomography. This paper studies wireless...
Provided by Tennessee Technological University
-
White Papers
Wireless Tomography, Part I: A Novel Approach to Remote Sensing
July 23, 2010, 12:00am PDT
The methodology, literature review, related work, and system engineering are presented. Concrete algorithms and hardware platforms are implemented to demonstrate this concept. Self-cohering...
Provided by Tennessee Technological University
-
White Papers
Towards A Real-Time Cognitive Radio Network Testbed: Architecture, Hardware Platform, and Application to Smart Grid
May 7, 2010, 12:00am PDT
A real-time cognitive radio network testbed is being built. This is the first paper to capture the overall picture of this project. Project scope and philosophy, design architecture, hardware...
Provided by Tennessee Technological University
-
White Papers
Prediction of Channel State for Cognitive Radio Using Higher-Order Hidden Markov Model
January 29, 2010, 12:00am PST
Spectrum sensing detects the availability of the radio frequency spectrum, which is essential and vital to cognitive radio. Traditional techniques for spectrum sensing fail to take the latency...
Provided by Tennessee Technological University
-
White Papers
Real-Time MISO UWB Radio Testbed and Waveform Design
January 29, 2010, 12:00am PST
The paper presents the design challenges and implementation issues of a real-time Multiple-Input Single-Output (MISO) Ultra-WideBand (UWB) radio testbed, which involves Xinlix Virtex-5 Field...
Provided by Tennessee Technological University
-
White Papers
Quickest Spectrum Detection Using Hidden Markov Model for Cognitive Radio
July 15, 2009, 12:00am PDT
The prerequisite of accessing white spectrum is to find and locate it. The authors' work deals with spectrum detection and recognition under the umbrella of cognitive radio. In the procedure of...
Provided by Tennessee Technological University
-
White Papers
Compressive Sensing Based Ultra-Wideband Communication System
September 16, 2008, 12:00am PDT
Sampling is the bottleneck for Ultra-WideBand (UWB) communication. The authors' major contribution is to exploit the channel itself as part of compressive sampling, through waveform-level...
Provided by Tennessee Technological University
-
White Papers
Channel Reciprocity and Time-Reversed Propagation for Ultra-Wideband Communications
January 26, 2007, 12:00am PST
This paper is the first paper of a new effort to understand UWB communications and sensor networking in RF harsh environments. Channel reciprocity and time reversed propagation is studied, using...
Provided by Tennessee Technological University
-
White Papers
UWB MISO Time Reversal With Energy Detector Receiver Over ISI Channels
January 25, 2007, 12:00am PST
This paper investigates a Multiple Input Single Output (MISO) time reversal system for Ultra-WideBand (UWB) communication over Inter-Symbol Interference (ISI) channels. Time reversal takes...
Provided by Tennessee Technological University
-
White Papers
A UWB Radio Network Using Multiple Delay Capture Enabled by Time Reversal
August 25, 2006, 12:00am PDT
An uplink multiple-access method for a centralized Ultra-WideBand (UWB) radio network is studied. The multiple-access method is based on a phenomenon of multiple delay capture and is enabled by...
Provided by Tennessee Technological University
-
White Papers
Symmetric Active/Active Metadata Service for Highly Available Cluster Storage Systems
January 1, 2008, 12:00am PST
In a typical distributed storage system, metadata is stored and managed by dedicated metadata servers. One way to improve the availability of distributed storage systems is to deploy multiple...
Provided by Tennessee Technological University
-
White Papers
Achieving Computational I/O Efficiency in a High Performance Cluster Using Multicore Processors
January 1, 2008, 12:00am PST
Cluster computing has become one of the most popular platforms for high-performance computing today. The recent popularity of multicore processors provides a flexible way to increase the...
Provided by Tennessee Technological University
-
White Papers
Towards a Large-Scale Cognitive Radio Network Testbed: Spectrum Sensing, System Architecture, and Distributed Sensing
March 27, 2012, 12:00am PDT
This paper presents a comprehensive review of the Cognitive Radio Network (CRN) testbed built at TTU. The authors' goals are to use their CRN testbed as a data acquisition tool; to use random...
Provided by Tennessee Technological University
-
White Papers
Cognitive Radio Network as Sensors: Low Signal-to-Noise Ratio Collaborative Spectrum Sensing
October 28, 2011, 12:00am PDT
This paper propose a function of covariance matrix based spectrum sensing approach for cognitive radio systems. The statistical covariance of signal and noise are usually different, so a binary...
Provided by Tennessee Technological University
-
White Papers
Cognitive Radio Network as Sensors: Low Signal-to-Noise Ratio Collaborative Spectrum Sensing
October 28, 2011, 12:00am PDT
This paper propose a function of covariance matrix based spectrum sensing approach for cognitive radio systems. The statistical covariance of signal and noise are usually different, so a binary...
Provided by Tennessee Technological University
-
White Papers
Towards a Large-Scale Cognitive Radio Network Testbed: Spectrum Sensing, System Architecture, and Distributed Sensing
March 27, 2012, 12:00am PDT
This paper presents a comprehensive review of the Cognitive Radio Network (CRN) testbed built at TTU. The authors' goals are to use their CRN testbed as a data acquisition tool; to use random...
Provided by Tennessee Technological University
-
White Papers
A UWB Radio Network Using Multiple Delay Capture Enabled by Time Reversal
August 25, 2006, 12:00am PDT
An uplink multiple-access method for a centralized Ultra-WideBand (UWB) radio network is studied. The multiple-access method is based on a phenomenon of multiple delay capture and is enabled by...
Provided by Tennessee Technological University
-
White Papers
UWB MISO Time Reversal With Energy Detector Receiver Over ISI Channels
January 25, 2007, 12:00am PST
This paper investigates a Multiple Input Single Output (MISO) time reversal system for Ultra-WideBand (UWB) communication over Inter-Symbol Interference (ISI) channels. Time reversal takes...
Provided by Tennessee Technological University
-
White Papers
Channel Reciprocity and Time-Reversed Propagation for Ultra-Wideband Communications
January 26, 2007, 12:00am PST
This paper is the first paper of a new effort to understand UWB communications and sensor networking in RF harsh environments. Channel reciprocity and time reversed propagation is studied, using...
Provided by Tennessee Technological University
-
White Papers
Compressive Sensing Based Ultra-Wideband Communication System
September 16, 2008, 12:00am PDT
Sampling is the bottleneck for Ultra-WideBand (UWB) communication. The authors' major contribution is to exploit the channel itself as part of compressive sampling, through waveform-level...
Provided by Tennessee Technological University
-
White Papers
Quickest Spectrum Detection Using Hidden Markov Model for Cognitive Radio
July 15, 2009, 12:00am PDT
The prerequisite of accessing white spectrum is to find and locate it. The authors' work deals with spectrum detection and recognition under the umbrella of cognitive radio. In the procedure of...
Provided by Tennessee Technological University
-
White Papers
Real-Time MISO UWB Radio Testbed and Waveform Design
January 29, 2010, 12:00am PST
The paper presents the design challenges and implementation issues of a real-time Multiple-Input Single-Output (MISO) Ultra-WideBand (UWB) radio testbed, which involves Xinlix Virtex-5 Field...
Provided by Tennessee Technological University
-
White Papers
Prediction of Channel State for Cognitive Radio Using Higher-Order Hidden Markov Model
January 29, 2010, 12:00am PST
Spectrum sensing detects the availability of the radio frequency spectrum, which is essential and vital to cognitive radio. Traditional techniques for spectrum sensing fail to take the latency...
Provided by Tennessee Technological University
-
White Papers
Towards A Real-Time Cognitive Radio Network Testbed: Architecture, Hardware Platform, and Application to Smart Grid
May 7, 2010, 12:00am PDT
A real-time cognitive radio network testbed is being built. This is the first paper to capture the overall picture of this project. Project scope and philosophy, design architecture, hardware...
Provided by Tennessee Technological University
-
White Papers
Wireless Tomography, Part I: A Novel Approach to Remote Sensing
July 23, 2010, 12:00am PDT
The methodology, literature review, related work, and system engineering are presented. Concrete algorithms and hardware platforms are implemented to demonstrate this concept. Self-cohering...
Provided by Tennessee Technological University
-
White Papers
Wireless Tomography, Part II: A System Engineering Approach
July 23, 2010, 12:00am PDT
This is the second paper in a series on a new initiative of wireless tomography. The goal is to combine two areas: wireless communication and radio tomography. This paper studies wireless...
Provided by Tennessee Technological University
-
White Papers
UWB Time Reversal: From Theory to Practice
August 17, 2010, 12:00am PDT
This paper discusses the theory behind Ultra-WideBand (UWB) transmit waveform design, and reports a proof-of-concept UWB radio testbed with waveform level precoding. Unlike a narrow-band channel,...
Provided by Tennessee Technological University
-
White Papers
Wireless Tomography, Part III: Compressed Sensing for Ultra-Wideband Signals
July 13, 2010, 12:00am PDT
Wireless tomography is related to wireless communications in that it requires the channel recovery between different waveforms at transmit and receive, as well as Multiple-Input Multiple-Output...
Provided by Tennessee Technological University
-
White Papers
FPGA Based UWB MISO Time-Reversal System Design and Implementation
June 14, 2010, 12:00am PDT
In this paper, a testbed design and implementation of Ultra-WideBand (UWB) Multiple-Input Single-Output (MISO) time-reversal system are presented. The implementation is based on Field Programmable...
Provided by Tennessee Technological University
-
White Papers
Phase Reconstruction Using Machine Learning For Wireless Tomography
November 5, 2010, 12:00am PDT
This is the following paper in a series on a new initiative of wireless tomography. The goal is to combine two areas: wireless communication and radio tomography. This paper primarily focuses on...
Provided by Tennessee Technological University
-
White Papers
Channel State Prediction in Cognitive Radio, Part II: Single-User Prediction
February 1, 2011, 12:00am PST
The response delay has a negative impact on the accuracy of spectrum sensing, which is the cornerstone of cognitive radio. In this paper, single-user prediction of channel state is proposed to...
Provided by Tennessee Technological University
-
White Papers
Channel State Prediction in Cognitive Radio, Part I: Response Delays in Practical Hardware Platforms
February 1, 2011, 12:00am PST
Cognitive radio has been put forward to make efficient use of scarce radio frequency spectrum. Spectrum sensing is the cornerstone of cognitive radio. As a part of the effort toward building a...
Provided by Tennessee Technological University
-
White Papers
Q-Learning Based Bidding Algorithm for Spectrum Auction in Cognitive Radio
February 8, 2011, 12:00am PST
Cognitive radio has been put forward to make efficient use of scarce radio frequency spectrum. Once available frequency bands have been detected using spectrum sensing algorithms, spectrum auction...
Provided by Tennessee Technological University
-
White Papers
Building a Cognitive Radio Network Testbed
February 8, 2011, 12:00am PST
Cognitive radio has been put forward to make efficient use of scarce radio frequency spectrum. A testbed for cognitive radio can not only verify concepts, algorithms, and protocols, but also dig...
Provided by Tennessee Technological University
-
White Papers
Cooperative Spectrum Sensing Using Q-Learning With Experimental Validation
February 8, 2011, 12:00am PST
Spectrum sensing detects the availability of the radio frequency spectrum and it is essential to cognitive radio. Cooperative spectrum sensing conducted among multiple secondary users has the...
Provided by Tennessee Technological University
-
White Papers
Towards A Real-Time UWB MIMO Testbed for Sensing and Communications
February 8, 2011, 12:00am PST
This paper reports a research testbed of real-time Ultra-WideBand (UWB) Multiple-Input Multiple-Output (MIMO) radio. In the receiver design, the UWB MIMO receiver supports up to eight channels,...
Provided by Tennessee Technological University
-
White Papers
Target Signal Detection With Function of Covariance Matrices in Clutter Environment
November 9, 2011, 12:00am PST
Clutter has a strong interference on target signal detection. Different statistical model should be applied to specific situation. In this paper, the authors propose a function of covariance...
Provided by Tennessee Technological University
-
White Papers
Target Detection With Linear and Kernel Subspaces Matching in the Presence of Strong Clutter
November 11, 2011, 12:00am PST
This paper proposes potential approaches to detect the weak target in the presence of strong disturbance. The disturbance consists of strong clutter and white Gaussian noise. The target and...
Provided by Tennessee Technological University
-
White Papers
Cognitive Radio Network as Wireless Sensor Network (III): Passive Target Intrusion Detection and Experimental Demonstration
November 8, 2011, 12:00am PST
A Cognitive Radio Network (CRN) based Wireless Sensor Network (WSN), as an extension of CRN, is explored for Radio Frequency (RF) passive target intrusion detection. Compared to a cheap WSN, the...
Provided by Tennessee Technological University
-
White Papers
Spectrum Sensing in Cognitive Radio With Robust Principal Component Analysis
October 28, 2011, 12:00am PDT
Spectrum sensing is a cornerstone in cognitive radio. Covariance matrix based method has been widely used in spectrum sensing. As is well-known that the covariance matrix of white noise is...
Provided by Tennessee Technological University
-
White Papers
Spectrum Sensing in Cognitive Radio With Subspace Matching
October 28, 2011, 12:00am PDT
Spectrum sensing has been put forward to make more efficient use of scarce radio frequency spectrum. The leading eigenvector of the sample covariance matrix has been applied to spectrum sensing...
Provided by Tennessee Technological University
-
White Papers
Towards A Large-Scale Cognitive Radio Network: Testbed, Intensive Computing, Frequency Agility, and Security
July 7, 2011, 12:00am PDT
Cognitive Radio (CR) is a promising technique for improving the efficiency of utilizing the precious radio spectrum. A Cognitive Radio Network (CRN) testbed not only can verify concepts,...
Provided by Tennessee Technological University
-
White Papers
60-GHzMillimeter-Wave Radio: Principle, Technology, and New Results
September 14, 2006, 12:00am PDT
The worldwide opening of a massive amount of unlicensed spectra around 60 GHz has triggered great interest in developing affordable 60-GHz radios. This interest has been catalyzed by recent...
Provided by Tennessee Technological University
-
White Papers
Evaluation of Data Dissemination Methods in Wireless Sensor Networks
May 14, 2008, 12:00am PDT
Wireless Sensor Network is a field that is growing in importance with every passing day. With applications ranging from military to simple habitat monitoring, sensor networks offer a vast...
Provided by Tennessee Technological University
-
White Papers
Modified Orthogonal Matching Pursuit Algorithm for Cognitive Radio Wideband Spectrum Sensing
February 14, 2011, 12:00am PST
Sampling rate is the bottleneck for spectrum sensing over multi-GHz bandwidth. Recent progress in Compressed Sensing (CS) initialized several sub-Nyquist rate approaches to overcome the problem....
Provided by Tennessee Technological University
-
White Papers
Spectrum Sensing Based on Blindly Learned Signal Feature
February 18, 2011, 12:00am PST
Spectrum sensing is the major challenge in the Cognitive Radio (CR). The authors propose to learn local feature and use it as the prior knowledge to improve the detection performance. They define...
Provided by Tennessee Technological University
-
White Papers
A Compressed Sensing Based Ultra-Wideband Communication System
April 14, 2009, 12:00am PDT
Sampling is the bottleneck for Ultra-WideBand (UWB) communication. The major contribution is to exploit the channel itself as part of compressed sensing, through waveform-based pre-coding at the...
Provided by Tennessee Technological University
-
White Papers
KVM on Clusters: Tackling the Disk I/O Bottleneck for HPC Virtualization
January 29, 2009, 12:00am PST
Extending virtualization technology into high-performance, cluster platforms generates exciting new possibilities. For example, runtime environments can be extended and tailored to each user or...
Provided by Tennessee Technological University
-
White Papers
Achieving Computational I/O Efficiency in a High Performance Cluster Using Multicore Processors
January 1, 2008, 12:00am PST
Cluster computing has become one of the most popular platforms for high-performance computing today. The recent popularity of multicore processors provides a flexible way to increase the...
Provided by Tennessee Technological University
-
White Papers
Symmetric Active/Active Metadata Service for Highly Available Cluster Storage Systems
January 1, 2008, 12:00am PST
In a typical distributed storage system, metadata is stored and managed by dedicated metadata servers. One way to improve the availability of distributed storage systems is to deploy multiple...
Provided by Tennessee Technological University
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