Now showing items 161-180 of 268

  • New Dynamic Model-Based Fault Detection Thresholds for Robot Manipulators 

    Visinsky, Monica L.; Walker, Ian D.; Cavallaro, Joseph R. (IEEE Computer Society Press, 1994-05-01)
    Autonomous robotic fault detection is becoming increasingly important as robots are used in more inaccessible and hazardous environments. Detection algorithms, however, are adversely effected by the model simplification, ...
  • A New Interferometric Phase-Shifting Technique for Sub-half-micron Laser Microlithography 

    Erdelyi, Miklos; Sengupta, Chaitali; Bor, Zsolt; Cavallaro, Joseph R.; Kido, Motoi; Smayling, Michael C.; Tittel, Frank K.; Wilson, William L.; Szabo, Gabor (SPIE, 1995-02-01)
    This paper reports recent progress in achieving sub-half-micron feature sizes with UV laser illumination based on a novel interferometric phase shifting (IPS) technique. In the IPS arrangement, the intensity and amount of ...
  • A New MIMO Detector Architecture Based on A Forward-Backward Trellis Algorithm 

    Sun, Yang; Cavallaro, Joseph R. (IEEE, 2008-10-01)
    In this paper, a recursive Forward-Backward (F-B) trellis algorithm is proposed for soft-output MIMO detection. Instead of using the traditional tree topology, we represent the search space of the MIMO signals with a fully ...
  • A New Phase Shifting Method for High Resolution Microlithography 

    Kido, Motoi; Cavallaro, Joseph R.; Szabo, Gabor; Wilson, William L.; Tittel, Frank K. (SME Press, 1994-01-01)
    One of the most promising lithographic technique for the future designs of DRAMs is the phase-shifting mask technique. Conventional phase shifting-masks, however, are difficult to fabricate as they require regions of ...
  • A New Phase Shifting Technique for Deep UV Excimer Laser Based Lithography 

    Bor, Zsolt; Cavallaro, Joseph R.; Erdelyi, Miklos; Kido, Motoi; Sengupta, Chaitali; Smayling, Michael; Szabo, Gabor; Tittel, Frank; Wilson, William (SPIE, 1995-02-01)
    This paper reports simulation and experimental details of a novel phase shifting technique based o laser interferometry. Phase shifting is one of the most promising techniques for the fabrication of high density DRAM's. ...
  • New Real-Time Robot Motion Algorithms Using Parallel VLSI Architectures 

    Deo, Arati S.; Cavallaro, Joseph R.; Walker, Ian D. (SIAM, 1991-03-01)
    Real time robot control presents a major numerical challenge. The inverse kinematics problem of determining joint motion for a specified end effector trajectory is formulated as a damped least-squares problem which balances ...
  • Non-coherent and Partially Coherent Space-Time Constellations 

    Borran, Mohammad Jaber (2003-06-01)
    With the rapid growth of wireless networks and multimedia applications, next generation cellular systems are expected to support data rates that are orders of magnitude higher than those currently available. Due to the ...
  • Nonlinear Fault Detection for Hydraulic Systems 

    Leuschen, Martin L.; Walker, Ian D.; Cavallaro, Joseph R. (Springer-Verlag Berlin Heidelberg, 2003-01-01)
    One of the most important areas in the robotics industry is the development of robots capable of working in hazardous environments. As humans cannot safely or cheaply work in these environments, providing a high level ...
  • Nonlinear Fault Detection for Hydraulics: Recent Advances in Fault Diagnosis and Fault Tolerance for Mechatronic Systems 

    Leuschen, Martin L.; Walker, Ian D.; Cavallaro, Joseph R. (2002-10-01)
    One of the most important areas in the robotics industry is the development of robots capable of working in hazardous environments. As humans cannot safely or cheaply work in these environments, providing a high level ...
  • Novel Sort-Free Detector with Modified Real-Valued Decomposition (M-RVD) Ordering in MIMO Systems 

    Amiri, Kiarash; Dick, Chris; Rao, Raghu; Cavallaro, Joseph R. (IEEE, 2008-11-01)
    K-best MIMO detection technique is the prominent method of simplifying the detection complexity in MIMO systems while maintaining BER performance comparable with the optimum maximum-likelihood (ML) detection technique. ...
  • On Beamforming with Finite Rate Feedback in Multiple Antenna Systems 

    Mukkavilli, Krishna Kiran; Sabharwal, Ashutosh; Erkip, Elza; Aazhang, Behnaam (2003-10-20)
    In this paper, we study a multiple antenna system where the transmitter is equipped with quantized information about instantaneous channel realizations. Assuming that the transmitter uses the quantized information for ...
  • On Design Criteria and Construction of Non-coherent Space-Time Constellations 

    Borran, Mohammad Jaber; Sabharwal, Ashutosh; Aazhang, Behnaam (2003-10-20)
    We consider the problem of digital communication in a Rayleigh flat fading environment using a multiple-antenna system, when the channel state information is available neither at the transmitter nor at the receiver. It ...
  • On Multipath Channel Estimation for CDMA Systems Using Multiple Sensors 

    Sengupta, Chaitali; Cavallaro, Joseph R.; Aazhang, Behnaam (2001-03-20)
    This paper focuses on the design of a multiuser receiver structure for the reverse link of a code-division multiple-access communication system, in the presence of multipath effects and using an antenna array at the base ...
  • On the Asymptotic Performance of Multiple Antenna Channels with Fast Channel Feedback 

    Khoshnevis, Ahmad; Sabharwal, Ashutosh (2005-10-01)
    In this paper, we analyze the asymptotic performance of multiple antenna channels where the transmitter has either perfect or finite bit channel state information. Using the diversitymultiplexing tradeoff to characterize ...
  • On the impact of variability on the buffer dynamics in IP networks 

    Joo, Youngmi; Ribeiro, Vinay Joseph; Feldmann, Anja; Gilbert, Anna; Willinger, Walter (1999-09-20)
    The main objective of this paper is to demonstrate in the context of a simple TCP/IP-based network that depending on the underlying assumptions about the inherent nature of the variability of network traffic, very different ...
  • On-line Arithmetic for Detection in Digital Communication Receivers 

    Rajagopal, Sridhar; Cavallaro, Joseph R. (2001-06-20)
    This paper demonstrates the advantages of using on-line arithmetic for traditional and advanced detection algorithms for communication systems. Detection is one of the core computationally-intensive physical layer operations ...
  • Optimal Signaling Strategies for Symmetric and Asymmetric Bit-Rate Communication Services in the Presence of Crosstalk 

    Gaikwad, Rohit; Baraniuk, Richard G. (1999-01-15)
    We have invented a new modem technology for transmitting data on conventional telephone lines (twisted pairs) at high speeds. This discovery is timely, as new standards are being developed for this Digital Subscriber Line ...
  • Optimal Transmit Spectra for Communication in the Presence of Crosstalk 

    Gaikwad, Rohit; Baraniuk, Richard G. (1999-06-01)
    This paper presents a general framework for designing optimal transmit spectra for symmetric bit-rate communication services dominated by crosstalk, in particular Digital Subscriber Line (DSL) services such as the proposed ...
  • Parallel Nonbinary LDPC Decoding on GPU 

    Wang, Guohui; Shen, Hao; Yin, Bei; Wu, Michael; Sun, Yang; Cavallaro, Joseph R. (IEEE, 2012-12-01)
    Nonbinary Low-Density Parity-Check (LDPC) codes are a class of error-correcting codes constructed over the Galois field GF(q) for q > 2. As extensions of binary LDPC codes, nonbinary LDPC codes can provide better ...
  • Parallel Searching-Based Sphere Detector for MIMO Downlink OFDM Systems 

    Radosavljevic, Predrag; Kim, Kyeong Jin; Shen, Hao; Cavallaro, Joseph R. (IEEE, 2012-06-01)
    In this paper, implementation of a detector with parallel partial candidate-search algorithm is described. Two fully independent partial candidate search processes are simultaneously employed for two groups of transmit ...