Now showing items 231-250 of 268

  • Safety of Robotic Systems - Guest Editorial 

    Petersen, Kurt E.; Walker, Ian D.; Cavallaro, Joseph R. (Elsevier Science Ltd, 1996-09-01)
    We were delighted to be invited by the editors of Reliability Engineering and System Safety to organise a special issue on the Safety of Robotic Systems. Robotic systems have now reached a level of sophistication far ...
  • Scalable and Low Power LDPC Decoder Design Using High Level Algorithmic Synthesis 

    Sun, Yang; Cavallaro, Joseph R.; Ly, Tai (IEEE, 2009-09-01)
    This paper presents a scalable and low power low-density parity-check (LDPC) decoder design for the next generation wireless handset SoC. The methodology is based on high level synthesis: PICO (program-in chip-out) tool ...
  • Scalable Architecture of MIMO Multi-carrier CDMA System on Programmable Logic 

    Guo, Yuanbin; Cavallaro, Joseph R. (IEEE, 2007-11-01)
    In this paper, a scalable architecture of the multicarrier CDMA system using Multiple-Input-Multiple-Output (MIMO) technology is designed in the programmable logic array. The system-level partitioning with different ...
  • Semi-Parallel Architectures For Real-time LDPC Coding 

    Karkooti, Marjan (2004-05-01)
    Error correcting codes (ECC) enable the communication systems to have a low-power, reliable transmission over noisy channels. ow Density Parity Check codes are the best known ECC code that can achieve data rates very close ...
  • Signal and Information Processing for Wireless Communication Systems 

    Bhashyam, Srikrishna (2001-04-20)
    Next generation wireless communication systems need to support access to multimedia data available on the internet. This universal wireless access to multimedia data requires data rates and quality of service that are ...
  • Simulation of Systolic Arrays On The Connection Machine 

    Hemkumar, Nariankadu D.; Cavallaro, Joseph R. (1993-09-20)
    The use of a programming model which extends naturally from the underlying hardware, greatly eases the design and implementation of simulators, especially for those systems that resemble the hardware in the paradigm of ...
  • Small-time scaling behaviors of Internet backbone traffic: An empirical study 

    Zhang, Zhi-Li; Ribeiro, Vinay Joseph; Moon, Sue; Diot, Christophe (2003-04-20)
    We study the small-time (sub-seconds) scaling behaviors of Internet backbone traffic, based on traces collected from OC3/12/48 links in a tier-1 ISP. We observe that for a majority of these traces, the (second-order) scaling ...
  • Soft Sphere Detection with Bounded Search for High-Throughput MIMO Receivers 

    Radosavljevic, Predrag; Cavallaro, Joseph R. (IEEE, 2006-11-01)
    We propose a soft sphere detection algorithm where search-bounds are determined based on the distribution of candidates found inside the sphere for different search levels. Detection accuracy of unbounded search is preserved ...
  • A Software Simulation Testbed for CDMA Wireless Communication Systems 

    Sundaramurthy, Vishwas (1999-05-20)
    This thesis develops a software wireless communication testbed which simulates a Code Division Multiple Access(CDMA) link. CDMA is a popular technology in cellular systems due to its superior capacity and performance. The ...
  • Spectral Optimization for Communication in the Presence of Crosstalk 

    Gaikwad, Rohit; Baraniuk, Richard G. (1999-03-01)
    This paper presents a general framework for designing optimal transmit spectra for communication services dominated by crosstalk --- for example Digital Subscriber Lines (DSLs) and wireless LANs. Using the channel, noise, ...
  • Structured Iterative and Circulant MIMO Chip Equalizer Architectures with FFT-acceleration for CDMA Systems 

    Guo, Yuanbin; McCain, Dennis; Cavallaro, Joseph R. (2005-07-01)
    In this paper, we propose a class of novel structured linear MMSE chip equalizer architectures for the MIMO CDMA systems using FFT-accelerations. First, a Conjugate Gradient (CG) algorithm is applied to avoid the Direct ...
  • Structured Parallel Architecture for Displacement MIMO Kalman Equalizer in CDMA Systems 

    Guo, Yuanbin; Zhang, Jianzhong; McCain, Dennis; Cavallaro, Joseph R. (IEEE, 2007-02-01)
    A reduced complexity MIMO Kalman equalizer architecture is proposed in this brief by jointly considering the displacement structure and the block-Toeplitz structure. Numerical matrix–matrix multiplications with O(F3) ...
  • Sub-quarter micron contact hole fabrication using annular illumination 

    Erdelyi, Miklos; Bor, Zsolt; Szabo, Gabor; Cavallaro, Joseph R.; Smayling, Michael C.; Tittel, Frank K.; Wilson, William L. (SPIE, 1996-03-01)
    Details of an experimental demonstration of a contact hole imaging system are reported in which the depth of focus is increased by a factor of about 3.5 using annular illumination. Due to spatial filtering and nonlinearity ...
  • Submicron Optical Lithography Based on a New Interferometric Phase Shifting Technique 

    Kido, Motoi; Szabo, Gabor; Cavallaro, Joseph R.; Wilson, William L.; Smayling, Michael C.; Tittel, Frank K. (Japanese Journal of Applied Physics, 1995-08-01)
    This paper reports the computer simulation and experimental demonstration of a new phase shifting technique based on interferometry that is especially suited for deep ultraviolet (UV) microlithography. Significant resolution ...
  • Submicron Optical Lithography Based on Interferometric Phase Shifting 

    Cavallaro, Joseph R.; Tittel, Frank K.; Wilson, William L. Jr. (SME Press, 1995-01-01)
    One of the most critical processing steps in the fabrication of integrated circuits is microlithography. The design of high density DRAMs requires the accurate patterning of submicron structures. The manufacturability of ...
  • A Survey of NASA and Military Standards on Fault Tolerance and Reliability Applied to Robotics 

    Cavallaro, Joseph R.; Walker, Ian D. (NASA, 1994-03-01)
    There is currently increasing interest and activity in the area of reliability and fault tolerance for robotics. This paper discusses the application of Standards in robot reliability, and surveys the literature of relevant ...
  • Task Partitioning Wireless Base-station Receiver Algorithms on Multiple DSPs and FPGAs 

    Rajagopal, Sridhar; Jones, Bryan Allen; Cavallaro, Joseph R. (2000-10-20)
    This paper presents a multiprocessor solution to meet real-time requirements of implementing advanced algorithms for multiuser channel estimation and detection for third and fourth generation wireless base-station receivers. ...
  • Testing on the Curve: Nonlinear Analytical Redundancy for Fault Detection 

    Leuschen, Martin L.; Cavallaro, Joseph R.; Walker, Ian D. (American Nuclear Society, 2001-03-01)
    One of the most important areas in the robotics industry is the development of robots capable of working in hazardous environments. Providing a high level of functionality in these arenas is important simply because humans ...
  • Time-Selective Signaling and Reception for Communication over Multipath Fading Channels 

    Bhashyam, Srikrishna; Sayeed, Akbar M.; Aazhang, Behnaam (2000-01-20)
    The mobile wireless channel affords inherent diversity to combat the effects of fading. Existing code division multiple access (CDMA) systems, by virtue of spread-spectrum signaling and RAKE reception, exploit only part ...
  • Toward an Improved Understanding of Network Traffic Dynamics 

    Riedi, Rudolf H.; Willinger, Walter (Wiley, 2000-01-15)
    Since the discovery of long range dependence in Ethernet LAN traces there has been significant progress in developing appropriate mathematical and statistical techniques that provide a physical-based, networking-related ...