An Integrated Agent Architecture for Software Defined Radio. Rapid-prototype cognitive radio, CR1, was developed to apply these.The modern software defined radio has been called the heart of a cognitive radio. Cognitive radio: an integrated agent architecture for software defined radio. Http:bwrc.eecs.berkeley.eduResearchMCMACR White paper final1.pdf. The cognitive radio, built on a software-defined radio, assumes. Radio: An Integrated Agent Architecture for Software Defined Radio, Ph.D. The need for software-defined radios is underlined and the most important notions used for such. Mitola III, Cognitive radio: an integrated agent architecture for software defined radio, Ph.D. This results in the set-theoretic ontology of radio knowledge defined in the. Cognitive Radio An Integrated Agent Architecture for Software.This article first briefly reviews the basic concepts about cognitive radio CR. Cognitive Radio-An Integrated Agent Architecture for Software Defined Radio. Cognitive Radio RHMZ 2007. Software-defined radio SDR idea 1. Cognitive radio: An integrated agent architecture for software.Cognitive Radio SOFTWARE DEFINED RADIO, AND ADAPTIVE WIRELESS SYSTEMS2 Cognitive Networks. 3 Joseph Mitola III, Cognitive Radio: An Integrated Agent Architecture for Software Defined Radio Stockholm.

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Cognitive Radio An Integrated Agent Architecture for Software Defined Radio

It is shown that, particularly for terrestrial cellular telephony, the interference-suppression feature of CDMA (code division multiple access) can result in a many-fold increase in capacity over analog and even over competing digital techniques. A single-cell system, such as a hubbed satellite network, is addressed, and the basic expression for capacity is developed. The corresponding expressions for a multiple-cell system are derived. and the distribution on the number of users supportable per cell is determined. It is concluded that properly augmented and power-controlled multiple-cell CDMA promises a quantum increase in current cellular capacity. >

On the capacity of a cellular CDMA system

National Institute of Standards and Technology における超伝導研究及び生活

The objective of this paper is to give a comprehensive introduction to applied cryptography with an engineer or computer scientist in mind. The emphasis is on the knowledge needed to create practical systems which supports integrity, confidentiality, or authenticity. Topics covered includes an introduction to the concepts in cryptography, attacks against cryptographic systems, key use and handling, random bit generation, encryption modes, and message authentication codes. Recommendations on algorithms and further reading is given in the end of the paper. This paper should make the reader able to build, understand and evaluate system descriptions and designs based on the cryptographic components described in the paper.

[서평]「Applied Cryptography」

羟氨苄青霉素引起大疱性类天疱疮样疹

The processor reconfiguration through instruction-set metamorphosis (PRISM) general-purpose architecture, which speeds up computationally intensive tasks by augmenting the core processor's functionality with new operations, is described. The PRISM approach adapts the configuration and fundamental operations of a core processing system to the computationally intensive portions of a targeted application. PRISM-1, an initial prototype system, is described, and experimental results that demonstrate the benefits of the PRISM concept are presented. >

Processor reconfiguration through instruction-set metamorphosis

Many algorithms rely on floating point arithmetic for the dynamic range of representations and require millions of calculations per second. Such computationally intensive algorithms are candidates for acceleration using custom computing machines (CCMs) being tailored for the application. Unfortunately, floating point operators require excessive area (or time) for conventional implementations. Instead, custom formats, derived for individual applications, are feasible on CCMs, and can be implemented on a fraction of a single FPGA. Using higher-level languages, like VHDL, facilitates the development of custom operators without significantly impacting operator performance or area. Properties, including area consumption and speed of working arithmetic operator units used in real-time applications, are discussed.

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Quantitative analysis of floating point arithmetic on FPGA based custom computing machines

This paper discusses the architecture and compiler for a general-purpose metamorphic computing platform called PRISM-II. PRISM-II improves the performance of many computationally-intensive tasks by augmenting the functionality of the core processor with new instructions that match the characteristics of targeted applications. In essence, PRISM (processor reconfiguration through instruction set metamorphosis) is a general purpose hardware platform that behaves like an application-specific platform. Two methods for hardware synthesis, one using VHDL Designer and the other using X-BLOX, are presented and synthesis results are compared. >

PRISM-II compiler and architecture

The authors explore the utility of custom computing machinery for accelerating the development, testing, and prototyping of a diverse set of image processing applications. We chose an experimental custom computing platform called Splash-2 to investigate this approach to prototyping real time image processing designs. Custom computing platforms are emerging as a class of computers that can provide near application specific computational performance. We developed a real time image processing system called VTSplash, based on the Splash-2 general-purpose platform. Splash-2 is an attached processor featuring programmable processing elements (PEs) and communication paths. The Splash-2 system uses arrays of RAM based field programmable gate arrays (FPGAs), crossbar networks, and distributed memory to accomplish the needed flexibility and performance tasks. Such platforms let designers customize specific operations for function and size, and data paths for individual applications. >

Real-time image processing on a custom computing platform

More than a dozen Wireless @ Virginia Tech faculty are working to address the broad research agenda of cognitive radio and cognitive networks. Our core research team spans the protocol stack from radio and reconfigurable hardware to communications theory to the networking layer. Our work includes new analysis methods and the development of new software architectures and applications, in addition to work on the core concepts and architectures underlying cognitive radios and cognitive networks. This paper describes these contributions and points towards critical future work that remains to fulfill the promise of cognitive radio. We briefly describe the history of work on cognitive radios and networks at Virginia Tech and then discuss our contributions to the core cognitive processing underlying these systems, focusing on our cognitive engine. We also describe developments that support the cognitive engine and advances in radio technology that provide the flexibility desired in a cognitive radio node. We consider securing and verifying cognitive systems and examine the challenges of expanding the cognitive paradigm up the protocol stack to optimize end-to-end network performance. Lastly, we consider the analysis of cognitive systems using game theory and the application of cognitive techniques to problems in dynamic spectrum sharing and control of multiple-input multiple-output radios.

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Peter Athanas

Papers

Processor reconfiguration through instruction-set metamorphosis

Quantitative analysis of floating point arithmetic on FPGA based custom computing machines

PRISM-II compiler and architecture

Real-time image processing on a custom computing platform

Cognitive Radio and Networking Research at Virginia Tech