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State Street Corporation
(16 results)-
Whitepapers
Joint Transceiver Beamforming Design and Power Allocation for Multiuser MIMO Systems
May 24, 2012, 12:00am PDT
Multi-User Multiple Input Multiple Output (MUMIMO) system is an excellent choice for the next generation broadband communications because of its great potential in enhancing MIMO system capacity....
Provided by State Street Corporation
-
Whitepapers
On the Extraction of Spread-Spectrum Hidden Data in Digital Media
May 24, 2012, 12:00am PDT
This paper considers the problem of blindly extracting data embedded over a wide band in a spectrum (transform) domain of a digital medium (image, audio, video). The authors first develop a...
Provided by State Street Corporation
-
Whitepapers
Uniquely Decodable Code-Division Via Augmented Sylvester-Hadamard Matrices
March 12, 2012, 12:00am PDT
The authors consider the problem of designing binary antipodal uniquely decodable (errorless) code sets for overloaded code-division multiplexing applications where the number of signals K is...
Provided by State Street Corporation
-
Whitepapers
Sum Transmission Power of Multiple Cooperative Secondary Transmitters in Dynamic Spectrum Access Networks
January 2, 2008, 12:00am PST
Cognitive radio is a desirable technique for secondary users to utilize the spectrum gray space. In order to avoid intolerable interference to primary users, the transmission power of cognitive...
Provided by State Street Corporation
-
Whitepapers
Secure Transmission Power of Cognitive Radios for Dynamic Spectrum Access Applications
January 2, 2008, 12:00am PST
One of the major concerns of cognitive radios when used for secondary spectrum access is the potential of interfering primary users, considering especially that cognitive radios may be misbehaved...
Provided by State Street Corporation
-
Whitepapers
Minimum Cost Optimization of MulticastWireless Networks With Network Coding
August 3, 2011, 12:00am PDT
Minimum cost optimization for multicast with network coding has attracted great research interests. In this paper, based on an information model that differentiates intermediate nodes in a...
Provided by State Street Corporation
-
Whitepapers
Anti-Jamming Performance of Cognitive Radio Networks
February 25, 2011, 12:00am PST
In this paper, the authors study both the jamming capability of the cognitive-radio-based jammers and the anti-jamming capability of the cognitive radio networks. They first setup the models of...
Provided by State Street Corporation
-
Whitepapers
Anti-Jamming Performance of Cognitive Radio Networks Under Multiple Uncoordinated Jammers in Fading Environment
May 18, 2012, 12:00am PDT
Cognitive Radio Networks (CRN) has attracted great attention recently as a means to resolve the critical spectrum shortage problem. With Dynamic Spectrum Access (DSA) techniques, CRN can be...
Provided by State Street Corporation
-
Whitepapers
Secondary Transmission Power of Cognitive Radios for Dynamic Spectrum Access
May 29, 2008, 12:00am PDT
In this paper, the authors analyze the allowable transmission power of cognitive radios when used as secondary users in a dynamic spectrum access network. Closed-form upper and lower bounds are...
Provided by State Street Corporation
-
Whitepapers
A Frequency Hopping Spread Spectrum Transmission Scheme for Uncoordinated Cognitive Radios
January 15, 2009, 12:00am PST
One of the major challenges to cognitive radios is the synchronization of distributed radios onto the same spectrum white spaces which vary in time and space. In this paper, the authors propose a...
Provided by State Street Corporation
-
Whitepapers
Transmission Power and Capacity of Secondary Users in a Dynamic Spectrum Access Network
August 21, 2007, 12:00am PDT
In this paper, the authors analyze the capacity of secondary spectrum access in a broadcasting system consisting of one primary transmitter and multiple primary receivers. At the cost of a small...
Provided by State Street Corporation
-
Whitepapers
An Efficient Method for Hop Selection and Capacity Enhancement in Multi-Hop Wireless Ad-Hoc Networks
June 6, 2007, 12:00am PDT
In this paper, the authors propose an approach with reduced complexity for the optimization of a multi-hop transmission path through a wireless network. Based on the assumption that nodes use...
Provided by State Street Corporation
-
Whitepapers
An OFDM-Based Distributed Transmission Scheme for Uncoordinated Transmitters Without Carrier Frequency and Timing Synchronization
August 5, 2012, 12:00am PDT
Distributed transmission involving multiple uncoordinated transmitters has become a popular subject in wireless communications, such as cooperative transmissions, relaying, distributed MIMO,...
Provided by State Street Corporation
-
Whitepapers
A Predictive-Reactive Method for Improving the Robustness of Real-Time Data Services
February 10, 2012, 12:00am PST
Supporting timely data services using fresh data in data-intensive real-time applications, such as e-commerce and transportation management, is desirable but challenging, since the workload may...
Provided by State Street Corporation
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Whitepapers
Estimating and Enhancing Real-Time Data Service Delays: Control Theoretic Approaches
November 25, 2009, 12:00am PST
It is essential to process real-time data service requests such as stock quotes and trade transactions in a timely manner using fresh data, which represent the current real world phenomena such as...
Provided by State Street Corporation
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Whitepapers
Supporting Preemptive Task Executions and Memory Copies in GPGPUs
April 13, 2012, 12:00am PDT
GPGPUs (General Purpose Graphic Processing Units) provide massive computational power. However, applying GPGPU technology to real-time computing is challenging due to the non-preemptive nature of...
Provided by State Street Corporation
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Whitepapers
Supporting Preemptive Task Executions and Memory Copies in GPGPUs
April 13, 2012, 12:00am PDT
GPGPUs (General Purpose Graphic Processing Units) provide massive computational power. However, applying GPGPU technology to real-time computing is challenging due to the non-preemptive nature of...
Provided by State Street Corporation
-
Whitepapers
Estimating and Enhancing Real-Time Data Service Delays: Control Theoretic Approaches
November 25, 2009, 12:00am PST
It is essential to process real-time data service requests such as stock quotes and trade transactions in a timely manner using fresh data, which represent the current real world phenomena such as...
Provided by State Street Corporation
-
Whitepapers
A Predictive-Reactive Method for Improving the Robustness of Real-Time Data Services
February 10, 2012, 12:00am PST
Supporting timely data services using fresh data in data-intensive real-time applications, such as e-commerce and transportation management, is desirable but challenging, since the workload may...
Provided by State Street Corporation
-
Whitepapers
An OFDM-Based Distributed Transmission Scheme for Uncoordinated Transmitters Without Carrier Frequency and Timing Synchronization
August 5, 2012, 12:00am PDT
Distributed transmission involving multiple uncoordinated transmitters has become a popular subject in wireless communications, such as cooperative transmissions, relaying, distributed MIMO,...
Provided by State Street Corporation
-
Whitepapers
An Efficient Method for Hop Selection and Capacity Enhancement in Multi-Hop Wireless Ad-Hoc Networks
June 6, 2007, 12:00am PDT
In this paper, the authors propose an approach with reduced complexity for the optimization of a multi-hop transmission path through a wireless network. Based on the assumption that nodes use...
Provided by State Street Corporation
-
Whitepapers
Transmission Power and Capacity of Secondary Users in a Dynamic Spectrum Access Network
August 21, 2007, 12:00am PDT
In this paper, the authors analyze the capacity of secondary spectrum access in a broadcasting system consisting of one primary transmitter and multiple primary receivers. At the cost of a small...
Provided by State Street Corporation
-
Whitepapers
A Frequency Hopping Spread Spectrum Transmission Scheme for Uncoordinated Cognitive Radios
January 15, 2009, 12:00am PST
One of the major challenges to cognitive radios is the synchronization of distributed radios onto the same spectrum white spaces which vary in time and space. In this paper, the authors propose a...
Provided by State Street Corporation
-
Whitepapers
Secondary Transmission Power of Cognitive Radios for Dynamic Spectrum Access
May 29, 2008, 12:00am PDT
In this paper, the authors analyze the allowable transmission power of cognitive radios when used as secondary users in a dynamic spectrum access network. Closed-form upper and lower bounds are...
Provided by State Street Corporation
-
Whitepapers
Anti-Jamming Performance of Cognitive Radio Networks Under Multiple Uncoordinated Jammers in Fading Environment
May 18, 2012, 12:00am PDT
Cognitive Radio Networks (CRN) has attracted great attention recently as a means to resolve the critical spectrum shortage problem. With Dynamic Spectrum Access (DSA) techniques, CRN can be...
Provided by State Street Corporation
-
Whitepapers
Anti-Jamming Performance of Cognitive Radio Networks
February 25, 2011, 12:00am PST
In this paper, the authors study both the jamming capability of the cognitive-radio-based jammers and the anti-jamming capability of the cognitive radio networks. They first setup the models of...
Provided by State Street Corporation
-
Whitepapers
Minimum Cost Optimization of MulticastWireless Networks With Network Coding
August 3, 2011, 12:00am PDT
Minimum cost optimization for multicast with network coding has attracted great research interests. In this paper, based on an information model that differentiates intermediate nodes in a...
Provided by State Street Corporation
-
Whitepapers
Secure Transmission Power of Cognitive Radios for Dynamic Spectrum Access Applications
January 2, 2008, 12:00am PST
One of the major concerns of cognitive radios when used for secondary spectrum access is the potential of interfering primary users, considering especially that cognitive radios may be misbehaved...
Provided by State Street Corporation
-
Whitepapers
Sum Transmission Power of Multiple Cooperative Secondary Transmitters in Dynamic Spectrum Access Networks
January 2, 2008, 12:00am PST
Cognitive radio is a desirable technique for secondary users to utilize the spectrum gray space. In order to avoid intolerable interference to primary users, the transmission power of cognitive...
Provided by State Street Corporation
-
Whitepapers
Uniquely Decodable Code-Division Via Augmented Sylvester-Hadamard Matrices
March 12, 2012, 12:00am PDT
The authors consider the problem of designing binary antipodal uniquely decodable (errorless) code sets for overloaded code-division multiplexing applications where the number of signals K is...
Provided by State Street Corporation
-
Whitepapers
On the Extraction of Spread-Spectrum Hidden Data in Digital Media
May 24, 2012, 12:00am PDT
This paper considers the problem of blindly extracting data embedded over a wide band in a spectrum (transform) domain of a digital medium (image, audio, video). The authors first develop a...
Provided by State Street Corporation
-
Whitepapers
Joint Transceiver Beamforming Design and Power Allocation for Multiuser MIMO Systems
May 24, 2012, 12:00am PDT
Multi-User Multiple Input Multiple Output (MUMIMO) system is an excellent choice for the next generation broadband communications because of its great potential in enhancing MIMO system capacity....
Provided by State Street Corporation
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