Search results for "fpga"

showing 10 items of 129 documents

Non linear digital control improving transient response:design and test on a multiphase VRM

2010

Settore ING-INF/01 - ElettronicaVRM switching converters pwm non linear control FPGA
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FPGA Implementation of a Reconfigurable 802.11 Medium Access Control

THis work describes a full implementation of a reconfigurable IEEE 802.11 Medium Access Control (MAC) in FPGA using a System on Chip (SoC) architecture. The proposed implementation has been designed with a great structural flexibility, so to ease the protocol modification, and to support Quality of Service (QoS) function. Estensive tests has been carried out showing a full compliance to the 802.11 standard timing and algorithms.

Settore ING-INF/03 - TelecomunicazioniFPGA implementation 802.11 WLAN System on Chip Reconfigurable ArchitectureSettore ING-INF/01 - Elettronica
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Efficient FPGA Implementation of a Knowledge-Based Automatic Speech Classifier

2005

Speech recognition has become common in many application domains, from dictation systems for professional practices to vocal user interfaces for people with disabilities or hands-free system control. However, so far the performance of Automatic Speech Recognition (ASR) systems are comparable to Human Speech Recognition (HSR) only under very strict working conditions, and in general far lower. Incorporating acoustic-phonetic knowledge into ASR design has been proven a viable approach to rise ASR accuracy. Manner of articulation attributes such as vowel, stop, fricative, approximant, nasal, and silence are examples of such knowledge. Neural networks have already been used successfully as dete…

Settore ING-INF/05 - Sistemi Di Elaborazione Delle InformazioniArtificial neural networkDictationComputer sciencebusiness.industrySpeech recognitionField programmable gate arrays (FPGA)artificial neuralPerceptronManner of articulationKnowledge baseUser interfacebusinessField-programmable gate arrayClassifier (UML)Neural networks
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An Embedded Module for Iris Micro-Characteristics Extraction

2009

In this paper a new approach, based on iris micro-characteristics, has been used to make possible an embedded biometric extractor. This recognition approach is based on ophthalmologic studies that have proven the existence of different micro-characteristics as well as fingerprint minutiae. These micro-characteristics are permanent and immutable and they can be used to create strong and robust identification systems.Biometric recognition systems are critical components of our everyday lives. Since such electronic products evolve to software intensive systems, where software, becoming larger, more complex and prevalent, introduces many problems in the development phases. The development of em…

Settore ING-INF/05 - Sistemi Di Elaborazione Delle InformazioniBiometricsbusiness.industryComputer scienceembedded software intensive systems iris micro-characteristics embedded module FPGA technologies biometric system.Feature extractionFingerprint recognitionIdentification (information)SoftwareEmbedded systemIRIS (biosensor)Field-programmable gate arraybusinessReactive systemComputer hardware
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Graphic Coprocessors with Native Clifford Algebra Support

2009

Settore ING-INF/05 - Sistemi Di Elaborazione Delle InformazioniClifford Algebra Geometric Algebra Embedded Coprocessors Application-specific Processors FPGA Prototyping
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ConformalALU: A Conformal Geometric Algebra Coprocessor for Medical Image Processing

2015

Medical imaging involves important computational geometric problems, such as image segmentation and analysis, shape approximation, three-dimensional (3D) modeling, and registration of volumetric data. In the last few years, Conformal Geometric Algebra (CGA), based on five-dimensional (5D) Clifford Algebra, is emerging as a new paradigm that offers simple and universal operators for the representation and solution of complex geometric problems. However, the widespread use of CGA has been so far hindered by its high dimensionality and computational complexity. This paper proposes a simplified formulation of the conformal geometric operations (reflections, rotations, translations, and uniform …

Settore ING-INF/05 - Sistemi Di Elaborazione Delle InformazioniCoprocessorComputer scienceClifford algebraConformal geometric algebraConformal mapImage processingParallel computingImage segmentationComputational geometryTheoretical Computer ScienceGeometric algebraOperator (computer programming)Computational Theory and MathematicsConformal geometric algebra five-dimensional clifford algebra computational geometry embedded coprocessors systems-on-programmable-chip FPGA-based prototyping medical imaging segmentation 3D modeling Volume registration Growing Neural Gas marching spheres iterative closest point (ICP) thin-plate spline robust point matching (TPS-RPM)Hardware and ArchitectureScalingSoftwareIEEE Transactions on Computers
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A Sliced Coprocessor for Native Clifford Algebra Operations

2007

Computer graphics applications require efficient tools to model geometric objects. The traditional approach based on compute-intensive matrix calculations is error-prone due to a lack of integration between geometric reasoning and matrix-based algorithms. Clifford algebra offers a solution to these issues since it permits specification of geometry at a coordinate-free level. The best way to exploit the symbolic computing power of geometric (Clifford) algebra is supporting its data types and operators directly in hardware. This paper outlines the architecture of S-CliffoSor (Sliced Clifford coprocessor), a parallelizable embedded coprocessor that executes native Clifford algebra operations. …

Settore ING-INF/05 - Sistemi Di Elaborazione Delle InformazioniCoprocessorComputer scienceProgramming languageClifford Algebra computational geometry application-specific coprocessor FPGA prototyping Sliced CoprocessorClifford algebraAlgebra over a fieldcomputer.software_genrecomputerFPGA prototype10th Euromicro Conference on Digital System Design Architectures, Methods and Tools (DSD 2007)
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Design and implementation of an embedded coprocessor with native support for 5D, quadruple-based Clifford algebra

2013

Geometric or Clifford algebra (CA) is a powerful mathematical tool that offers a natural and intuitive way to model geometric facts in a number of research fields, such as robotics, machine vision, and computer graphics. Operating in higher dimensional spaces, its practical use is hindered, however, by a significant computational cost, only partially addressed by dedicated software libraries and hardware/software codesigns. For low-dimensional algebras, several dedicated hardware accelerators and coprocessing architectures have been already proposed in the literature. This paper introduces the architecture of CliffordALU5, an embedded coprocessing core conceived for native execution of up t…

Settore ING-INF/05 - Sistemi Di Elaborazione Delle InformazioniCoprocessorSpeedupComputational Theory and MathematicsClifford algebra Computational geometry Embedded coprocessors Application-specific processors FPGA-based prototypingHardware and ArchitectureComputer scienceClifford algebraParallel computingComputational geometryField-programmable gate arraySoftwareTheoretical Computer Science
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An embedded iris recognizer for portable and mobile devices

2010

Software-intensive systems play an increasingly dominant role in our lives and daily activities. Several applications, in which a timely response to user and environment stimulus is essential, require real-time software intensive systems. Computation-intensive applications, such as video compression, control systems, security systems, result in significant growth for processor workload. To address the above issues, one possible solution is to design embedded specialized components. At the same time, the integration of new features in portable and mobile devices is rapidly increasing. Several services and applications require robust user authentication for access to services, data, and resou…

Settore ING-INF/05 - Sistemi Di Elaborazione Delle InformazioniEmbedded Software Intensive Systems Real-Time Embedded Systems Iris-based Authentication Systems FPGA Technologies
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A Family of Embedded Coprocessors with Native Geometric Algebra Support

2015

Clifford Algebra or Geometric Algebra (GA) is a simple and intuitive way to model geometric objects and their transformations. Operating in high-dimensional vector spaces with significant computational costs, the practical use of GA requires, however, dedicated software and/or hardware architectures to directly support Clifford data types and operators. In this paper, a family of embedded coprocessors for the native execution of GA operations is presented. The paper shows the evolution of the coprocessor family focusing on the latest two architectures that offer direct hardware support to up to five-dimensional Clifford operations. The proposed coprocessors exploit hardware-oriented represe…

Settore ING-INF/05 - Sistemi Di Elaborazione Delle InformazioniGeometric Algebra Embedded Coprocessors Application- Specic Processors FPGA-based Prototyping
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