Economic Development Association of Alabama

Displaying 1-27 of 27 results

  • White Papers // Dec 2011

    Dynamically Reconfigurable Hybrid Cache: An Energy-Efficient Last-Level Cache Design

    The recent development of Non-Volatile Memory (NVM), such as Spin-Torque Transfer magnetoresistive RAM (STT-RAM) and Phase-change RAM (PRAM), with the advantage of low leakage and high density, provides an energy-efficient alternative to traditional SRAM in cache systems. The authors propose a novel Reconfigurable Hybrid Cache architecture (RHC), in which NVM...

    Provided By Economic Development Association of Alabama

  • White Papers // Mar 2010

    A Co-Design Approach for Embedded System Modeling and Code Generation With UML and MARTE

    This paper proposes a UML/MDA approach, called MoPCoM methodology, to design high quality real-time embedded systems. The paper has defined a set of rules to build UML models for embedded systems, from which VHDL code is automatically generated by means of MDA techniques. The paper uses the MARTE profile as...

    Provided By Economic Development Association of Alabama

  • White Papers // Mar 2010

    PhoenixSim: A Simulator for Physical-Layer Analysis of Chip-Scale Photonic Interconnection Networks

    Recent developments have shown the possibility of leveraging silicon nanophotonic technologies for chip-scale interconnection fabrics that deliver high bandwidth and power efficient communications both on- and off-chip. Since, optical devices are fundamentally different from conventional electronic interconnect technologies, new design methodologies and tools are required to exploit the potential performance...

    Provided By Economic Development Association of Alabama

  • White Papers // Feb 2010

    Enabling Efficient Post-Silicon Debug by Clustering of Hardware-Assertions

    Bug-free first silicon is not guaranteed by the existing pre-silicon verification techniques. To have impeccable products, it is now required to identify any bug as soon as the first silicon becomes available. The paper considers the Assertion Based Verification techniques for the post-silicon debugging based on the insertion of hardware...

    Provided By Economic Development Association of Alabama

  • White Papers // Feb 2010

    SCOC3: A Space Computer on a Chip - An Example of Successful Development of a Highly Integrated Innovative ASIC

    This paper presents the definition of an integrated processor core ASIC named SCOC3 which is designed for space computers. It also presents the validation method that has led to a successful ASIC run at the first time, thanks to Astrium's improved control in microelectronic component design. It is base on...

    Provided By Economic Development Association of Alabama

  • White Papers // Feb 2010

    Closing the Gap Between UML-Based Modeling, Simulation and Synthesis of Combined HW/SW Systems

    UML is widely applied for the specification and modeling of software and some studies have demonstrated that it is applicable for HW/SW codesign. However, in this area there is still a big gap from UML modeling to SystemC-based verification and synthesis environments. This paper presents an efficient approach to bridge...

    Provided By Economic Development Association of Alabama

  • White Papers // Feb 2010

    UML Design for Dynamically Reconfigurable Multiprocessor Embedded Systems

    This paper proposes a design methodology to explore partial and dynamic reconfiguration of modern FPGAs. The paper improves an UML based co-design methodology to allow dynamic properties in embedded systems. The approach targets MPSoPC (Multiprocessor System on Programmable Chip) which allows area optimization through partial reconfiguration without performance penalty. In...

    Provided By Economic Development Association of Alabama

  • White Papers // Feb 2010

    Performance-Asymmetry-Aware Topology Virtualization for Defect-Tolerant NoC-Based Many-Core Processors

    Topology virtualization techniques are proposed for NoCbased many-core processors with core-level redundancy to isolate hardware changes caused by on-chip defective cores. Prior work focuses on homogeneous cores with symmetric performance and optimizes on-chip communication only. However, core-to-core performance asymmetry due to manufacturing process variations poses new challenges for constructing virtual...

    Provided By Economic Development Association of Alabama

  • White Papers // Feb 2010

    Ultra Low-Power 12-Bit SAR ADC for RFID Applications

    The design and first measuring results of an ultra-low power 12bit Successive-Approximation ADC for autonomous multi-sensor systems are presented. The comparator and the DAC are optmised for the lowest power consumption. The proposed design has a power consumption of 0.52?W at a bitclock of 50-kHz and of 0.85?W at 100-kHz...

    Provided By Economic Development Association of Alabama

  • White Papers // Feb 2010

    Low-Complexity High Throughput VLSI Architecture of Soft-Output ML MIMO Detector

    In this paper VLSI architecture of a high throughput and high performance Soft-Output (SO) MIMO detector (the recently presented Layered ORthogonal Lattice Detector, LORD) is presented. The baseline implementation includes optimal (i.e. Maximum-Likelihood - ML - in the Max-Log sense) SO generation. A reduced complexity variant of the SO generation...

    Provided By Economic Development Association of Alabama

  • White Papers // Feb 2010

    A Low Cost Multi-Standard Near-Optimal Soft-Output Sphere Decoder: Algorithm and Architecture

    The authors present an algorithm and architecture of a soft-output sphere decoder with an optimized hardware implementation for 2x2 MIMO-OFDM receptions. They introduce a novel table look-up approach for symbol enumeration that simplifies the implementation of soft-output decoders. The HW implementation is targeted towards WLAN (IEEE 802.11n) with stringent latency...

    Provided By Economic Development Association of Alabama

  • White Papers // Feb 2010

    Domain Specific Architecture for Next Generation Wireless Communication

    In order to solve the challenges in processor design for the next generation wireless communication systems, this paper first proposes a system level design flow for communication domain specific processor, and then proposes a novel processor architecture for the next generation wireless communication named GAEA using this design flow. GAEA...

    Provided By Economic Development Association of Alabama

  • White Papers // Feb 2010

    A 150Mbit/s 3GPP LTE Turbo Code Decoder

    3GPP Long Term Evolution (LTE) enhances the wireless communication standards UMTS and HSDPA towards higher throughput. A throughput of 150 Mbit/s is specified for LTE using 2?2 MIMO. For this, highly punctured Turbo codes with rates up to 0.95 are used for channel coding, which is a big challenge for...

    Provided By Economic Development Association of Alabama

  • White Papers // Feb 2010

    DVFS Based Task Scheduling in a Harvesting WSN for Structural Health Monitoring

    The task scheduler of an energy harvesting Wireless Sensor Node (WSN) must adapt the task complexity and maximize the accuracy of the tasks within the constraint of limited energy reserves. Structural Health Monitoring (SHM) represents a great example of such an application comprising of both steady state operations and sporadic...

    Provided By Economic Development Association of Alabama

  • White Papers // Feb 2010

    An Architecture for Self-Organization in Pervasive Systems

    Pervasive computing environments consist of many independent collaborating electronic devices, including sensors and actuators. Ad-Hoc extendibility of such systems is desirable but the current network technologies use the concept of a central coordinator device in the network or define application profiles which are not easy to extend and maintain. The...

    Provided By Economic Development Association of Alabama

  • White Papers // Feb 2010

    Non-Intrusive Virtualization Management Using Libvirt

    The success of server virtualization has led to the deployment of a huge number of virtual machines in today's data centers, making a manual virtualization management very laborintensive. The development of appropriate management solutions is hindered by the various management interfaces of different hypervisors. Therefore, a uniform management can be...

    Provided By Economic Development Association of Alabama

  • White Papers // Feb 2010

    An Accurate System Architecture Refinement Methodology With Mixed Abstraction-Level Virtual Platform

    The increasing complexity of today's System-On-a-Chip (SoC) design is challenging the design engineers to evaluate the system performance and explore the design space. Electronic System-Level (ESL) design methodology is of great help for attacking the challenges in recent years. In this paper, the authors present a system-level architecture refinement flow...

    Provided By Economic Development Association of Alabama

  • White Papers // Apr 2009

    A Hybrid Packet-Circuit Switched On-Chip Network Based on SDM

    This paper proposes a novel on-chip communication scheme by dividing the resources of a traditional packet-switched network-on-chip between a packet-switched and a circuit-switched sub-network. The former directs packets according to the traditional packet-switching mechanism, while the latter forwards packets over circuits which are directly established between two non-adjacent nodes by...

    Provided By Economic Development Association of Alabama

  • White Papers // Apr 2009

    A Case Study in Distributed Deployment of Embedded Software for Camera Networks

    The authors present an embedded software application for the real-time estimation of building occupancy using a network of video cameras. They analyze a series of alternative decompositions of the main application tasks and profile each of them by running the corresponding embedded software on three different processors. Based on the...

    Provided By Economic Development Association of Alabama

  • White Papers // Mar 2009

    Algorithm-Architecture Co-Design of Soft-Output ML MIMO Detector for Parallel Application Specific Instruction Set Processors

    Emerging SDR baseband platforms are usually based on multiple DLP+ILP processors with massive parallelism. Although these platforms would theoretically enable advanced SDR signal processing, existing work implemented basic systems and simple algorithms. Importantly, MIMO is not fully supported in most implemented MIMO but with a simple linear detector. The authors'...

    Provided By Economic Development Association of Alabama

  • White Papers // Mar 2009

    A Low-Power ASIP for IEEE 802.15.4a Ultra-Wideband Impulse Radio Baseband Processing

    The IEEE 802.15.4a amendment has introduced Ultra-WideBand Impulse Radio (UWB IR) as a promising physical layer for energy-efficient, low data rate communications. A critical part of the UWB IR receiver design is the low-power implementation of the digital baseband processing required for synchronization and data decoding. In this paper, the...

    Provided By Economic Development Association of Alabama

  • White Papers // Mar 2009

    ASIP-Based Flexible MMSE-IC Linear Equalizer for MIMO Turbo-Equalization Applications

    A novel 16-bit flexible Application-Specific Instruction set Processor for an MMSE-IC Linear Equalizer, used in iterative turbo receiver, is presented in this paper. The proposed ASIP has SIMD architecture with a specialized instruction-set and 7-stage pipeline control. It supports diverse requirements of MIMO-OFDM wireless standards such as use of QPSK,...

    Provided By Economic Development Association of Alabama

  • White Papers // Mar 2009

    Implementation of a Reduced-Lattice MIMO Detector for OFDM Systems

    This paper presents a novel VLSI implementation of a MIMO detector for OFDM systems. The proposed architecture is able to perform both linear MMSE and reduced lattice-aided MIMO detection, making it possible to adjust the balance between performance and power consumption. In order to facilitate real-time detection in reduced lattice...

    Provided By Economic Development Association of Alabama

  • White Papers // Mar 2009

    Energy-Efficient Spatially-Adaptive Clustering and Routing in Wireless Sensor Networks

    Wireless sensor networks hold the potential to open new domains to distributed data acquisition. However, low-cost battery-powered nodes are often used to implement such networks, resulting in tight energy and communication bandwidth constraints. Cluster-based data compression and aggregation helps to reduce communication energy consumption. However, neglecting to adapt cluster sizes...

    Provided By Economic Development Association of Alabama

  • White Papers // Mar 2009

    Finite Precision Processing in Wireless Applications

    Complex signal processing algorithms are often specified in floating point precision. Thus, a type conversion is needed when the targeted platform requires fixed-point precision. In this paper, the authors proposed a new method to evaluate the final impact of finite precision processing in wireless applications. The latter combines analytical analysis...

    Provided By Economic Development Association of Alabama

  • White Papers // Mar 2009

    Error Correction in Single-Hop Wireless Sensor Networks - A Case Study

    Energy efficient communication is a key issue in wireless sensor networks. Common belief is that a multi-hop configuration is the only viable energy efficient technique. In this paper, the authors show that the use of forward error correction techniques in combination with ARQ is a promising alternative. Exploiting the asymmetry...

    Provided By Economic Development Association of Alabama

  • White Papers // Mar 2009

    Co-Simulation Based Platform for Wireless Protocols Design Explorations

    Longer range, faster speed and stronger link are today's wireless mandatory characteristics. Tremendous efforts are being deployed to create new and improved wireless protocols. However, these new protocols are being tested in harsh and uncontrolled environments. Simulation tools help to capture the expected behavior, but the proposed designs might not...

    Provided By Economic Development Association of Alabama

  • White Papers // Apr 2009

    A Hybrid Packet-Circuit Switched On-Chip Network Based on SDM

    This paper proposes a novel on-chip communication scheme by dividing the resources of a traditional packet-switched network-on-chip between a packet-switched and a circuit-switched sub-network. The former directs packets according to the traditional packet-switching mechanism, while the latter forwards packets over circuits which are directly established between two non-adjacent nodes by...

    Provided By Economic Development Association of Alabama

  • White Papers // Feb 2010

    Enabling Efficient Post-Silicon Debug by Clustering of Hardware-Assertions

    Bug-free first silicon is not guaranteed by the existing pre-silicon verification techniques. To have impeccable products, it is now required to identify any bug as soon as the first silicon becomes available. The paper considers the Assertion Based Verification techniques for the post-silicon debugging based on the insertion of hardware...

    Provided By Economic Development Association of Alabama

  • White Papers // Feb 2010

    SCOC3: A Space Computer on a Chip - An Example of Successful Development of a Highly Integrated Innovative ASIC

    This paper presents the definition of an integrated processor core ASIC named SCOC3 which is designed for space computers. It also presents the validation method that has led to a successful ASIC run at the first time, thanks to Astrium's improved control in microelectronic component design. It is base on...

    Provided By Economic Development Association of Alabama

  • White Papers // Feb 2010

    Closing the Gap Between UML-Based Modeling, Simulation and Synthesis of Combined HW/SW Systems

    UML is widely applied for the specification and modeling of software and some studies have demonstrated that it is applicable for HW/SW codesign. However, in this area there is still a big gap from UML modeling to SystemC-based verification and synthesis environments. This paper presents an efficient approach to bridge...

    Provided By Economic Development Association of Alabama

  • White Papers // Feb 2010

    UML Design for Dynamically Reconfigurable Multiprocessor Embedded Systems

    This paper proposes a design methodology to explore partial and dynamic reconfiguration of modern FPGAs. The paper improves an UML based co-design methodology to allow dynamic properties in embedded systems. The approach targets MPSoPC (Multiprocessor System on Programmable Chip) which allows area optimization through partial reconfiguration without performance penalty. In...

    Provided By Economic Development Association of Alabama

  • White Papers // Mar 2010

    A Co-Design Approach for Embedded System Modeling and Code Generation With UML and MARTE

    This paper proposes a UML/MDA approach, called MoPCoM methodology, to design high quality real-time embedded systems. The paper has defined a set of rules to build UML models for embedded systems, from which VHDL code is automatically generated by means of MDA techniques. The paper uses the MARTE profile as...

    Provided By Economic Development Association of Alabama

  • White Papers // Mar 2009

    Energy-Efficient Spatially-Adaptive Clustering and Routing in Wireless Sensor Networks

    Wireless sensor networks hold the potential to open new domains to distributed data acquisition. However, low-cost battery-powered nodes are often used to implement such networks, resulting in tight energy and communication bandwidth constraints. Cluster-based data compression and aggregation helps to reduce communication energy consumption. However, neglecting to adapt cluster sizes...

    Provided By Economic Development Association of Alabama

  • White Papers // Feb 2010

    Non-Intrusive Virtualization Management Using Libvirt

    The success of server virtualization has led to the deployment of a huge number of virtual machines in today's data centers, making a manual virtualization management very laborintensive. The development of appropriate management solutions is hindered by the various management interfaces of different hypervisors. Therefore, a uniform management can be...

    Provided By Economic Development Association of Alabama

  • White Papers // Feb 2010

    Performance-Asymmetry-Aware Topology Virtualization for Defect-Tolerant NoC-Based Many-Core Processors

    Topology virtualization techniques are proposed for NoCbased many-core processors with core-level redundancy to isolate hardware changes caused by on-chip defective cores. Prior work focuses on homogeneous cores with symmetric performance and optimizes on-chip communication only. However, core-to-core performance asymmetry due to manufacturing process variations poses new challenges for constructing virtual...

    Provided By Economic Development Association of Alabama

  • White Papers // Mar 2009

    Co-Simulation Based Platform for Wireless Protocols Design Explorations

    Longer range, faster speed and stronger link are today's wireless mandatory characteristics. Tremendous efforts are being deployed to create new and improved wireless protocols. However, these new protocols are being tested in harsh and uncontrolled environments. Simulation tools help to capture the expected behavior, but the proposed designs might not...

    Provided By Economic Development Association of Alabama

  • White Papers // Mar 2009

    Algorithm-Architecture Co-Design of Soft-Output ML MIMO Detector for Parallel Application Specific Instruction Set Processors

    Emerging SDR baseband platforms are usually based on multiple DLP+ILP processors with massive parallelism. Although these platforms would theoretically enable advanced SDR signal processing, existing work implemented basic systems and simple algorithms. Importantly, MIMO is not fully supported in most implemented MIMO but with a simple linear detector. The authors'...

    Provided By Economic Development Association of Alabama

  • White Papers // Mar 2009

    A Low-Power ASIP for IEEE 802.15.4a Ultra-Wideband Impulse Radio Baseband Processing

    The IEEE 802.15.4a amendment has introduced Ultra-WideBand Impulse Radio (UWB IR) as a promising physical layer for energy-efficient, low data rate communications. A critical part of the UWB IR receiver design is the low-power implementation of the digital baseband processing required for synchronization and data decoding. In this paper, the...

    Provided By Economic Development Association of Alabama

  • White Papers // Mar 2009

    ASIP-Based Flexible MMSE-IC Linear Equalizer for MIMO Turbo-Equalization Applications

    A novel 16-bit flexible Application-Specific Instruction set Processor for an MMSE-IC Linear Equalizer, used in iterative turbo receiver, is presented in this paper. The proposed ASIP has SIMD architecture with a specialized instruction-set and 7-stage pipeline control. It supports diverse requirements of MIMO-OFDM wireless standards such as use of QPSK,...

    Provided By Economic Development Association of Alabama

  • White Papers // Mar 2009

    Implementation of a Reduced-Lattice MIMO Detector for OFDM Systems

    This paper presents a novel VLSI implementation of a MIMO detector for OFDM systems. The proposed architecture is able to perform both linear MMSE and reduced lattice-aided MIMO detection, making it possible to adjust the balance between performance and power consumption. In order to facilitate real-time detection in reduced lattice...

    Provided By Economic Development Association of Alabama

  • White Papers // Dec 2011

    Dynamically Reconfigurable Hybrid Cache: An Energy-Efficient Last-Level Cache Design

    The recent development of Non-Volatile Memory (NVM), such as Spin-Torque Transfer magnetoresistive RAM (STT-RAM) and Phase-change RAM (PRAM), with the advantage of low leakage and high density, provides an energy-efficient alternative to traditional SRAM in cache systems. The authors propose a novel Reconfigurable Hybrid Cache architecture (RHC), in which NVM...

    Provided By Economic Development Association of Alabama

  • White Papers // Mar 2010

    PhoenixSim: A Simulator for Physical-Layer Analysis of Chip-Scale Photonic Interconnection Networks

    Recent developments have shown the possibility of leveraging silicon nanophotonic technologies for chip-scale interconnection fabrics that deliver high bandwidth and power efficient communications both on- and off-chip. Since, optical devices are fundamentally different from conventional electronic interconnect technologies, new design methodologies and tools are required to exploit the potential performance...

    Provided By Economic Development Association of Alabama

  • White Papers // Apr 2009

    A Case Study in Distributed Deployment of Embedded Software for Camera Networks

    The authors present an embedded software application for the real-time estimation of building occupancy using a network of video cameras. They analyze a series of alternative decompositions of the main application tasks and profile each of them by running the corresponding embedded software on three different processors. Based on the...

    Provided By Economic Development Association of Alabama

  • White Papers // Feb 2010

    An Accurate System Architecture Refinement Methodology With Mixed Abstraction-Level Virtual Platform

    The increasing complexity of today's System-On-a-Chip (SoC) design is challenging the design engineers to evaluate the system performance and explore the design space. Electronic System-Level (ESL) design methodology is of great help for attacking the challenges in recent years. In this paper, the authors present a system-level architecture refinement flow...

    Provided By Economic Development Association of Alabama

  • White Papers // Feb 2010

    Ultra Low-Power 12-Bit SAR ADC for RFID Applications

    The design and first measuring results of an ultra-low power 12bit Successive-Approximation ADC for autonomous multi-sensor systems are presented. The comparator and the DAC are optmised for the lowest power consumption. The proposed design has a power consumption of 0.52?W at a bitclock of 50-kHz and of 0.85?W at 100-kHz...

    Provided By Economic Development Association of Alabama

  • White Papers // Feb 2010

    Low-Complexity High Throughput VLSI Architecture of Soft-Output ML MIMO Detector

    In this paper VLSI architecture of a high throughput and high performance Soft-Output (SO) MIMO detector (the recently presented Layered ORthogonal Lattice Detector, LORD) is presented. The baseline implementation includes optimal (i.e. Maximum-Likelihood - ML - in the Max-Log sense) SO generation. A reduced complexity variant of the SO generation...

    Provided By Economic Development Association of Alabama

  • White Papers // Feb 2010

    A Low Cost Multi-Standard Near-Optimal Soft-Output Sphere Decoder: Algorithm and Architecture

    The authors present an algorithm and architecture of a soft-output sphere decoder with an optimized hardware implementation for 2x2 MIMO-OFDM receptions. They introduce a novel table look-up approach for symbol enumeration that simplifies the implementation of soft-output decoders. The HW implementation is targeted towards WLAN (IEEE 802.11n) with stringent latency...

    Provided By Economic Development Association of Alabama

  • White Papers // Feb 2010

    Domain Specific Architecture for Next Generation Wireless Communication

    In order to solve the challenges in processor design for the next generation wireless communication systems, this paper first proposes a system level design flow for communication domain specific processor, and then proposes a novel processor architecture for the next generation wireless communication named GAEA using this design flow. GAEA...

    Provided By Economic Development Association of Alabama

  • White Papers // Feb 2010

    A 150Mbit/s 3GPP LTE Turbo Code Decoder

    3GPP Long Term Evolution (LTE) enhances the wireless communication standards UMTS and HSDPA towards higher throughput. A throughput of 150 Mbit/s is specified for LTE using 2?2 MIMO. For this, highly punctured Turbo codes with rates up to 0.95 are used for channel coding, which is a big challenge for...

    Provided By Economic Development Association of Alabama

  • White Papers // Feb 2010

    DVFS Based Task Scheduling in a Harvesting WSN for Structural Health Monitoring

    The task scheduler of an energy harvesting Wireless Sensor Node (WSN) must adapt the task complexity and maximize the accuracy of the tasks within the constraint of limited energy reserves. Structural Health Monitoring (SHM) represents a great example of such an application comprising of both steady state operations and sporadic...

    Provided By Economic Development Association of Alabama

  • White Papers // Feb 2010

    An Architecture for Self-Organization in Pervasive Systems

    Pervasive computing environments consist of many independent collaborating electronic devices, including sensors and actuators. Ad-Hoc extendibility of such systems is desirable but the current network technologies use the concept of a central coordinator device in the network or define application profiles which are not easy to extend and maintain. The...

    Provided By Economic Development Association of Alabama

  • White Papers // Mar 2009

    Finite Precision Processing in Wireless Applications

    Complex signal processing algorithms are often specified in floating point precision. Thus, a type conversion is needed when the targeted platform requires fixed-point precision. In this paper, the authors proposed a new method to evaluate the final impact of finite precision processing in wireless applications. The latter combines analytical analysis...

    Provided By Economic Development Association of Alabama

  • White Papers // Mar 2009

    Error Correction in Single-Hop Wireless Sensor Networks - A Case Study

    Energy efficient communication is a key issue in wireless sensor networks. Common belief is that a multi-hop configuration is the only viable energy efficient technique. In this paper, the authors show that the use of forward error correction techniques in combination with ARQ is a promising alternative. Exploiting the asymmetry...

    Provided By Economic Development Association of Alabama