Now showing items 113-132 of 268

  • Imaging with Terahertz Pulses 

    Dorney, Timothy D.; Johnson, Jon L.; Mittleman, Daniel M.; Baraniuk, Richard G. (2000-07-01)
    Recently, a real-time imaging system based on terahertz (THz) time-domain spectroscopy has been developed. This technique offers a range of unique imaging modalities due to the broad bandwidth, sub-picosecond duration, and ...
  • Implementation and Complexity Analysis of List Sphere Detector for MIMO-OFDM systems 

    Myllylä, Markus; Juntti, Markku; Cavallaro, Joseph R. (2008-10-01)
    A list sphere detector (LSD) is an enhancement of a sphere detector (SD) that can be used to approximate the soft output maximum a posteriori probability (MAP) detector used in the detection of the multiple-input ...
  • Implementation aspects of list sphere decoder algorithms for MIMO-OFDM systems 

    Myllylä, Markus; Cavallaro, Joseph R.; Juntti, Markku (2010-10-01)
    A list sphere decoder (LSD) can be used to approximate the optimal maximum a posteriori (MAP) detector for the detection of multiple-input multiple-output (MIMO) signals. In this paper, we consider two LSD algorithms with ...
  • Implementation of a 3GPP LTE Turbo Decoder Accelerator on GPU 

    Wu, Michael; Cavallaro, Joseph R. (2010-10-01)
    This paper presents a 3GPP LTE compliant turbo decoder accelerator on GPU. The challenge of implementing a turbo decoder is finding an efficient mapping of the decoder algorithm on GPU, e.g. finding a good way to parallelize ...
  • Implementation of a High Throughput 3GPP Turbo Decoder on GPU 

    Wu, Michael; Sun, Yang; Wang, Guohui; Cavallaro, Joseph R. (2011-11-01)
    Turbo code is a computationally intensive channel code that is widely used in current and upcoming wireless standards. General-purpose graphics processor unit (GPGPU) is a programmable commodity processor that achieves ...
  • Implementation of a High Throughput Soft MIMO Detector on GPU 

    Wu, Michael; Sun, Yang; Gupta, Siddharth; Cavallaro, Joseph R. (2011-07-01)
    Multiple-input multiple-output (MIMO) significantly increases the throughput of a communication system by employing multiple antennas at the transmitter and the receiver. To extract maximum performance from a MIMO system, ...
  • Implementation of Channel Estimation and Multiuser Detection Algorithms for W-CDMA on Digital Signal Processors 

    Rajagopal, Sridhar; Xu, Gang; Cavallaro, Joseph R. (1999-08-20)
    Proposed algorithms for Third Generation W-CDMA communication systems have extremely high performance requirements. In this paper, we study the implementation issues involved for one of the proposed multiuser channel ...
  • Implementation of LS, MMSE and SAGE Channel Estimators for Mobile MIMO-OFDM 

    Ketonen, Johanna; Juntti, Markku; Ylioinas, Jari; Cavallaro, Joseph R. (2012-12-01)
    The use of decision directed (DD) channel estimation in a multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) downlink receiver is studied in this paper. The 3GPP long term evolution ...
  • Improving MIMO Sphere Detection Through Antenna Detection Order Scheduling 

    Wu, Michael; Dick, Chris; Cavallaro, Joseph R. (2011-12-01)
    This paper proposes a novel scalable Multiple-Input Multiple-Output (MIMO) detector that does not require preprocessing to achieve good bit error rate (BER) performance. MIMO processing is a key technology in broadband ...
  • Improving Performance of a Space-Time Turbo Code in a Rayleigh Faded Channel 

    Huang, Everest; Gatherer, Alan; Muharemovic, Tarik; Hocevar , Dale (2001-10-20)
    Starting with an ordinary parallel concatenated turbo encoder in a block fading Rayleigh channel, we introduce bit-interleaving of the outputs, not for time diversity, but to increase the coding gain. We develop a guideline ...
  • Improving power efficiency in stream processors through dynamic cluster reconfiguration 

    Rajagopal, Sridhar; Rixner, Scott; Cavallaro, Joseph R. (2004-12-01)
    Stream processors support hundreds of functional units in a programmable architecture by clustering functional units and utilizing a bandwidth hierarchy. Clusters are the dominant source of power consumption in stream ...
  • An Integrated CAD Framework Linking VLSI Layout Editors and Process Simulators 

    Sengupta, Chaitali (1995-05-20)
    This thesis presents an Integrated CAD Framework which links VLSI layout editors to lithographic simulators and provides information on the simulated resolution of a feature to the circuit designer. This will help designers ...
  • An Integrated CAD Framework Linking VLSI Layout Editors and Process Simulators 

    Sengupta, Chaitali; Erdelyi, Miklos; Bor, Zsolt; Cavallaro, Joseph R.; Smayling, Michael C.; Szabo, Gabor; Tittel, Frank K.; Wilson, William L. (1996-03-01)
    As feature sizes in VLSI circuits extend into the far sub-micron range, new process techniques, such as using phase shifting masks for photolithography, will be needed. Under these conditions, the only means for the circuit ...
  • Interferometric Phase Shift Technique for High Resolution Deep UV Microlithography 

    Tittel, Frank K.; Cavallaro, Joseph R.; Kido, Motoi; Smayling, Michael C.; Szabo, Gabor; Wilson, William L. (1994-09-01)
    A new phase shifting technique based on interferometry has been developed which is especially suited for deep-UV microlithography. Using only a single layer chromium mask, with no additional phase shift elements, significant ...
  • Investigation of Reliability of Hydraulic Robots for Hazardous Environments Using Analytic Redundancy 

    Leuschen, Martin L.; Walker, Ian D.; Cavallaro, Joseph R. (1999-01-01)
    The Rosie mobile worksystem is a robot that is on the cutting edge of hazardous environment robotics. It is a heavy-duty hydraulic robot designed for nuclear reactor decontamination and dismantlement. The robot consists ...
  • Joint Detection Strategies for Orthogonal Frequency Division Multiplexing 

    Ahmed, Nadeem (2000-04-20)
    Traditional OFDM implementations use conventional Fourier filters for data modulation, via the IFFT operation. Much research suggests wavelet based OFDM provides performance gains, due to superior spectral containment ...
  • Joint signaling strategies for approaching the capacity of twisted-pair channels 

    Sendonaris, Andrew; Veeravalli, Venugopal V.; Aazhang, Behnaam (1998-10-20)
    A technique is presented for jointly optimizing the signaling in the two directions of transmission on a twisted-pair communications channel. It is then applied to twisted-pair channel models with monotonic channel response ...
  • Keeping the Analog Genie in the Bottle: A Case for Digital Robots 

    Walker, Ian D.; Cavallaro, Joseph R.; Leuschen, Martin L. (1999-05-01)
    In this paper, we consider the case for adopting a truly 'digital' type of robot, which would evolve between a discrete and finite set of states. We adopt the point of view that the advantages of traditional robotic evolution ...
  • Laboratory Workstations in Electrical Engineering 

    Aneshansley, Daniel J.; Pottle, Christopher; Cavallaro, Joseph R. (1985-06-01)
    Computers, configured for data acquisition and control, have been used in undergraduate laboratories at Cornell University's School of Electrical Engineering since the early 1970s. The introduction of personal computers ...
  • Layered Dynamic Fault Detection and Tolerance for Robots 

    Visinsky, Monica L.; Walker, Ian D.; Cavallaro, Joseph R. (1993-05-01)
    Fault tolerance is increasingly important for space and hazardous environment robotics. Robots need to quickly detect and tolerate internal failures in order to continue performing their tasks without the need for immediate ...