Now showing items 156-175 of 268

  • Multitier Wireless Communications 

    Aazhang, Behnaam; Cavallaro, Joseph R. (2001-06-20)
    Next-generation computing systems will be highly integrated using wireless networking. The Rice Everywhere NEtwork (RENE) project is exploring the integration of WCDMA cellular systems, high speed wireless LANs, and home ...
  • Multitier Wireless Systems 

    Aazhang, Behnaam; Cavallaro, Joseph R. (2000-05-01)
    Next-generation computing systems will be highly integrated using wireless networking. The Rice Everywhere NEtwork (RENE) project is exploring the integration of WCDMA cellular systems, high speed wireless LANs, and home ...
  • Multiuser detection in fast-fading multipath environments 

    Sayeed, Akbar M.; Aazhang, Behnaam (2001-10-20)
    We propose a new framework for multiuser detection in fast-fading channels that are encountered in many mobile communication scenarios. Existing multiuser RAKE receivers, developed to combat multipath fading and multiuser ...
  • Multiuser detection in fast-fading multipath environments 

    Sayeed, Akbar M.; Sendonaris, Andrew; Aazhang, Behnaam (1998-12-20)
    We propose a new framework for multiuser detection in fast-fading channels that are encountered in many mobile communication scenarios. Existing multiuser RAKE receivers, developed to combat multipath fading and multiuser ...
  • Multiuser Information Processing in Wireless Communication 

    Das, Suman (2000-09-20)
    Wireless channel is not very conducive towards error-free raw data transmission. On the other hand the tremendous growth in wireless services has made the channel bandwidth a scarce resource and effective utilization of ...
  • New Dynamic Model-Based Fault Detection Thresholds for Robot Manipulators 

    Visinsky, Monica L.; Walker, Ian D.; Cavallaro, Joseph R. (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 (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. (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. (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 (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. (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. (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. (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 ...