Now showing items 146-165 of 268

  • Measurement Driven Deployment of a Two-Tier Urban Mesh Access Network 

    Camp, Joseph; Robinson, Joshua; Steger, Christopher; Knightly, Edward (2006-06-01)
    Multihop wireless mesh networks can provide Internet access over a wide area with minimal infrastructure expenditure. In this work, we present a measurement driven deployment strategy and a data-driven model to study the ...
  • A Mobile Testbed for GPS-Based ITS/IVC and Ad Hoc Routing Experimentation 

    Welsh, Erik; Murphy, Patrick; Frantz, Patrick (2002-10-01)
    Past investigations into the formation of ad hoc networks and ad hoc routing have focused on computer simulations of mobile traffic. However, the proliferation of mobile electronic devices (mobile phones, PDAs, and laptop ...
  • Modeling of Welkin RF in a DSSS System 

    Guo, Yuanbin (2000-09-20)
    In this report, the author studied the methodology of distortion-true software modeling for RF (radio frequency) in a DSSS W-CDMA system. A complete end-to-end testbed based on the Welkin RF system is built by SystemView ...
  • Modelling Heterogeneous DSP–FPGA Based System Partitioning with Extensions to the Spinach Simulation Environment 

    Brogioli, Michael; Cavallaro, Joseph R. (2005-11-01)
    In this paper we present system-on-a-chip extensions to the Spinach simulation environment for rapidly prototyping heterogeneous DSP/FPGA based architectures, specifically in the embedded domain. This infrastructure has ...
  • Monitoring and Diagnostics for a Hydraulic Robot in Hazardous Environments 

    Leuschen, Martin L.; Cavallaro, Joseph R.; Walker, Ian D. (1999-04-01)
    Hazardous environments are an important application of modern robotic techniques. However, failures can be quite serious in such environments, especially if they trap the robot within or damage containment efforts. Thus ...
  • Multi-Layer Parallel Decoding Algorithm and VLSI Architecture for Quasi-Cyclic LDPC Codes 

    Sun, Yang; Wang, Guohui; Cavallaro, Joseph R. (2011-05-01)
    We propose a multi-layer parallel decoding algorithm and VLSI architecture for decoding of structured quasi-cyclic low-density parity-check codes. In the conventional layered decoding algorithm, the block-rows of the parity ...
  • Multifractal Cross-Traffic Estimation 

    Ribeiro, Vinay Joseph; Coates, Mark J.; Riedi, Rudolf H.; Sarvotham, Shriram; Hendricks, Brent; Baraniuk, Richard G. (2000-09-01)
    In this paper we develop a novel model-based technique, the Delphi algorithm, for inferring the instantaneous volume of competing cross-traffic across an end-to-end path. By using only end-to-end measurements, Delphi avoids ...
  • A Multifractal Wavelet Model with Application to Network Traffic 

    Riedi, Rudolf H.; Crouse, Matthew; Ribeiro, Vinay Joseph; Baraniuk, Richard G. (1999-04-01)
    In this paper, we develop a new multiscale modeling framework for characterizing positive-valued data with long-range-dependent correlations (1/f noise). Using the Haar wavelet transform and a special multiplicative structure ...
  • MultiHop Communication is Order Optimal for Homogeneous Sensor Networks 

    Chakrabarti, Arnab; Sabharwal, Ashutosh; Aazhang, Behnaam (2004-04-01)
    The main goal of this paper is to show that multi-hop single-user communication achieves the per node transport capacity of O(lnN/N) in homogeneous sensor networks, making it order-optimal. Our contributions in this paper ...
  • Multiscale Nature of Network Traffic 

    Abry, Patrice; Baraniuk, Richard G.; Flandrin, Patrick; Riedi, Rudolf H.; Veitch, Darryl (2002-05-01)
    The complexity and richness of telecommunications traffic is such that one may despair to find any regularity or explanatory principles. Nonetheless, the discovery of scaling behavior in tele-traffic has provided hope that ...
  • 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.; 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 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 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. ...