Tennessee Tech University

Displaying 1-10 of 10 results

  • White Papers // Jan 2014

    ASA: An Adaptive Space Allocation Algorithm for Cache Management in Multi-level Cache Hierarchy

    Multi-level cache hierarchies are widely used in high-performance storage systems to improve I/O performance. However, traditional cache management algorithms are not suited well for such cache organizations. Recently proposed exclusive caching works well with single or multiple-client, low-correlated workloads, but suffers serious performance degradation with multiple-client, high-correlated workloads. In this...

    Provided By Tennessee Tech University

  • White Papers // Jan 2014

    Achieving Computational I/O Efficiency in a High Performance Cluster Using Multicore Processors

    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 computational capability of clusters. Although the system performance may improve with multicore processors in a cluster, I/O requests initiated by multiple cores may...

    Provided By Tennessee Tech University

  • White Papers // Jan 2014

    A Fast Read/Write Process to Reduce RDMA Communication Latency

    RDMA reduces network latency by eliminating unnecessary copies from network interface cards to application buffers, but how to reduce memory registration cost is a challenge. Previous studies use pin-down cache and batched deregistration to address this issue. In this paper, the authors propose a new design of communication process: Fast...

    Provided By Tennessee Tech University

  • White Papers // Jun 2011

    Wideband Beamforming With Heavily Imbalanced Channels

    This paper studies fixed wideband beamforming with consideration of realistic channels. There has been a perception that nice beam patterns can always be formed with advanced optimization techniques. This is mostly true if the channels are ideal. But in reality it is not always true. Indeed, achieving a desirable beam...

    Provided By Tennessee Tech University

  • White Papers // Aug 2010

    Deisgn of Look-Up Table Based Architecture for Wideband Beamforming

    Wideband beamforming with a real-time array testbed will be studied in this paper. The algorithm and implementation architecture on wideband beamforming will be the main focus. The contribution of this paper can be summarized in the following three aspects. First, the channel imbalances among different RF chains will be taken...

    Provided By Tennessee Tech University

  • White Papers // May 2010

    Robust Wideband Beamforming

    Robust wideband beamforming with a real-time array testbed will be studied in this paper. For the practical consideration of uncertainty, channel impulse responses or channel transform functions of RF chains can not be obtained exactly due to the limitation of sounding and calibration procedure. Thus robust optimization will be applied...

    Provided By Tennessee Tech University

  • White Papers // Jan 2009

    Spectrum Sensing and Reconstruction for Cognitive Radio

    The Federal Communications Commission (FCC) opened free 'White space' spectrum on November 4, 2008. In this way, Google and other technology companies that wanted access to more free spectrum have gotten their wish. The prerequisite of the access to the free spectrum is to find this kind of spectrum. This...

    Provided By Tennessee Tech University

  • White Papers // Jan 2009

    Waveform-Level Precoding With Simple Energy Detector Receiver for Wideband Communication

    Wideband waveform-level precoding with simple energy detector receiver is investigated in this paper. The motivation is to provide a cheap radio network with simple receivers and sophisticated transmitters. The energy detector receiver performs relatively poorly, but waveform-level precoding can be used to compensate for the performance loss. Waveform-level precoding is...

    Provided By Tennessee Tech University

  • White Papers // Dec 2007

    Evaluation of iPVFS: A High Performance Parallel File System over iSCSI for Cluster Computing

    In this paper, the authors propose a high performance parallel file system over iSCSI for cluster computing. iPVFS provides a cost-effective solution for heterogeneous cluster environments by dividing a set of I/O servers into two groups. One group, with higher performance, serves as I/O nodes, while the other group, with...

    Provided By Tennessee Tech University

  • White Papers // Mar 2006

    MRRC: An Effective Cache for Fast Memory Registration in RDMA

    RDMA reduces network latency by eliminating unnecessary copies from network interface card to application buffers, but how to reduce memory registration cost is a challenge. Previous studies use pin-down cache and batched deregistration to address this issue, but only simple LRU is used as a replacement algorithm to manage the...

    Provided By Tennessee Tech University

  • White Papers // Aug 2010

    Deisgn of Look-Up Table Based Architecture for Wideband Beamforming

    Wideband beamforming with a real-time array testbed will be studied in this paper. The algorithm and implementation architecture on wideband beamforming will be the main focus. The contribution of this paper can be summarized in the following three aspects. First, the channel imbalances among different RF chains will be taken...

    Provided By Tennessee Tech University

  • White Papers // May 2010

    Robust Wideband Beamforming

    Robust wideband beamforming with a real-time array testbed will be studied in this paper. For the practical consideration of uncertainty, channel impulse responses or channel transform functions of RF chains can not be obtained exactly due to the limitation of sounding and calibration procedure. Thus robust optimization will be applied...

    Provided By Tennessee Tech University

  • White Papers // Jan 2009

    Spectrum Sensing and Reconstruction for Cognitive Radio

    The Federal Communications Commission (FCC) opened free 'White space' spectrum on November 4, 2008. In this way, Google and other technology companies that wanted access to more free spectrum have gotten their wish. The prerequisite of the access to the free spectrum is to find this kind of spectrum. This...

    Provided By Tennessee Tech University

  • White Papers // Jan 2009

    Waveform-Level Precoding With Simple Energy Detector Receiver for Wideband Communication

    Wideband waveform-level precoding with simple energy detector receiver is investigated in this paper. The motivation is to provide a cheap radio network with simple receivers and sophisticated transmitters. The energy detector receiver performs relatively poorly, but waveform-level precoding can be used to compensate for the performance loss. Waveform-level precoding is...

    Provided By Tennessee Tech University

  • White Papers // Jun 2011

    Wideband Beamforming With Heavily Imbalanced Channels

    This paper studies fixed wideband beamforming with consideration of realistic channels. There has been a perception that nice beam patterns can always be formed with advanced optimization techniques. This is mostly true if the channels are ideal. But in reality it is not always true. Indeed, achieving a desirable beam...

    Provided By Tennessee Tech University

  • White Papers // Dec 2007

    Evaluation of iPVFS: A High Performance Parallel File System over iSCSI for Cluster Computing

    In this paper, the authors propose a high performance parallel file system over iSCSI for cluster computing. iPVFS provides a cost-effective solution for heterogeneous cluster environments by dividing a set of I/O servers into two groups. One group, with higher performance, serves as I/O nodes, while the other group, with...

    Provided By Tennessee Tech University

  • White Papers // Jan 2014

    ASA: An Adaptive Space Allocation Algorithm for Cache Management in Multi-level Cache Hierarchy

    Multi-level cache hierarchies are widely used in high-performance storage systems to improve I/O performance. However, traditional cache management algorithms are not suited well for such cache organizations. Recently proposed exclusive caching works well with single or multiple-client, low-correlated workloads, but suffers serious performance degradation with multiple-client, high-correlated workloads. In this...

    Provided By Tennessee Tech University

  • White Papers // Jan 2014

    Achieving Computational I/O Efficiency in a High Performance Cluster Using Multicore Processors

    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 computational capability of clusters. Although the system performance may improve with multicore processors in a cluster, I/O requests initiated by multiple cores may...

    Provided By Tennessee Tech University

  • White Papers // Mar 2006

    MRRC: An Effective Cache for Fast Memory Registration in RDMA

    RDMA reduces network latency by eliminating unnecessary copies from network interface card to application buffers, but how to reduce memory registration cost is a challenge. Previous studies use pin-down cache and batched deregistration to address this issue, but only simple LRU is used as a replacement algorithm to manage the...

    Provided By Tennessee Tech University

  • White Papers // Jan 2014

    A Fast Read/Write Process to Reduce RDMA Communication Latency

    RDMA reduces network latency by eliminating unnecessary copies from network interface cards to application buffers, but how to reduce memory registration cost is a challenge. Previous studies use pin-down cache and batched deregistration to address this issue. In this paper, the authors propose a new design of communication process: Fast...

    Provided By Tennessee Tech University