Now showing items 983-1002 of 1051

  • Ultrahigh Resolution Lithography with Excimer Lasers 

    Tittel, Frank K.; Erdelyi, Miklos; Sengupta, Chaitali; Bor, Zsolt; Szabo, Gabor; Cavallaro, Joseph R.; Smayling, Michael C.; Wilson, William L. (1995-07-01)
    The photolithography process is central to integrated circuit fabrication. Through this process an integrated circuit is patterned by imaging a photomask onto a layer of photoresist. The light source currently being used ...
  • UNIFIED DECODER ARCHITECTURE FOR LDPC/TURBO CODES 

    Sun, Yang; Cavallaro, Joseph R. (2008-10-01)
    Low-density parity-check (LDPC) codes on par with convolutional turbo codes (CTC) are two of the most powerful error correction codes known to perform very close to the Shannon limit. However, their different code structures ...
  • Unitary Equivalence and Signal Processing 

    Baraniuk, Richard G.; Jones, Douglas L. (1993-08-01)
    The notions of time, frequency, and scale are generalized using concepts from unitary operator theory and eigenanalysis. The result is an infinite number of new signal analysis and processing tools that are implemented ...
  • Unitary Equivalence: A New Twist on Signal Processing 

    Baraniuk, Richard G.; Jones, Douglas L. (1995-10-01)
    Unitary similarity transformations furnish a powerful vehicle for generating infinite generic classes of signal analysis and processing tools based on concepts different from time, frequency, and scale. Implementation of ...
  • Universal Distributed Sensing via Random Projections 

    Wakin, Michael; Duarte, Marco F.; Baraniuk, Richard G.; Baron, Dror (2006-04-01)
    This paper develops a new framework for distributed coding and compression in sensor networks based on distributed compressed sensing (DCS). DCS exploits both intra-signal and inter-signal correlations through the concept ...
  • Unsupervised SAR Image Segmentation using Recursive Partitioning 

    Baraniuk, Richard G. (2000-04-01)
    We present a new approach to SAR image segmentation based on a Poisson approximation to the SAR amplitude image. It has been established that SAR amplitude images are well approximated using Rayleigh distributions. We show ...
  • Untimed-C based SoC Architecture Design Space Exploration for 3G and Beyond Wireless Systems 

    Guo, Yuanbin; McCain, Dennis (2005-02-01)
    In this paper, we propose an un-timed C/C++ level verification methodology that integrates key technologies for truly high-level VLSI modelling to keep pace with the explosive complexity of SoC designs in the 3G and beyond ...
  • The Use of Fault Trees for the Design of Robots for Hazardous Environments 

    Walker, Ian D.; Cavallaro, Joseph R. (1996-01-01)
    This paper addresses the application of fault trees to the analysis of robot manipulator reliability and fault tolerance. Although a common and useful tool in other applications, fault trees have only recently been applied ...
  • Useful Facts about the Kullback-Leibler Discrimination Distance 

    Lexa, Michael (2004-12-01)
    This report contains a list of some of the more prominent properties and theorems concerning the Kullback-Leibler (KL) discrimination distance. A brief discussion is also provided indicating the type of problems in which ...
  • User Cooperation Diversity--Part I: System Description 

    Sendonaris, Andrew; Erkip, Elza; Aazhang, Behnaam (2003-11-20)
    Mobile users' data rate and quality of service are limited by the fact that, within the duration of any given call, they experience severe variations in signal attenuation, thereby necessitating the use of some type of ...
  • User Cooperation Diversity--Part II: Implementation Aspects and Performance Analysis 

    Sendonaris, Andrew; Erkip, Elza; Aazhang, Behnaam (2003-11-20)
    This is the second in a two-part series of papers on a new form of spatial diversity, where diversity gains are achieved through the cooperation of mobile users. Part I described the user cooperation concept and proposed ...
  • Using Bluetooth for Short-Term Ad-Hoc Connections Between Moving Vehicles: A Feasibility Study 

    Murphy, Patrick; Welsh, Erik; Frantz, Patrick (2002-05-01)
    Bluetoothâ ¢ is a promising wireless technology designed for short-range ad-hoc connections, and it has many potentially useful applications. One such use is the transfer of data between two fast-moving vehicles such as ...
  • Using Predictable Observer Mobility for Power Efficient Design of Sensor Networks 

    Chakrabarti, Arnab; Sabharwal, Ashutosh; Aazhang, Behnaam (2003-04-20)
    In this paper, we explore a novel avenue of saving power in sensor networks based on predictable mobility of the observer (or data sink). Predictable mobility is a good model for public transportation ve- hicles (buses, ...
  • Using Speculative Retirement and Larger Instruction Windows to Narrow the Performance Gap between Memory Consistency Models 

    Ranganathan, Parthasarathy; Pai, Vijay S.; Adve, Sarita V. (1997-06-20)
    None
  • Using the Plasmon Linewidth To Calculate the Time and Efficiency of Electron Transfer between Gold Nanorods and Graphene 

    Hoggard, Anneli; Wang, Lin-Yung; Ma, Lulu; Fang, Ying; You, Ge; Olson, Jana; Liu, Zheng; Chang, Wei-Shun; Ajayan, Pulickel M.; Link, Stephan (2013)
    We present a quantitative analysis of the electron transfer between single gold nanorods and monolayer graphene under no electrical bias. Using single-particle dark-field scattering and photoluminescence spectroscopy to ...
  • VALID: Custom ASIC Verification and FPGA Education Platform 

    Murphy, Patrick; Welsh, Erik; Frantz, Patrick; Hardy, Ricky; Mohsenin, Tinoosh; Cavallaro, Joseph R. (2003-06-01)
    This paper describes VALID, a platform for testing student designed ASICs and for teaching the basics of FPGA design. VALID is designed to maximize ease of use from a student?s perspective while maintaining enough flexibility ...
  • Variable-Rate Universal Slepian-Wolf Coding with Feedback 

    Sarvotham, Shriram; Baron, Dror; Baraniuk, Richard G. (2005-11-01)
    Traditional Slepian-Wolf coding assumes known statistics and relies on asymptotically long sequences. However, in practice the statistics are unknown, and the input sequences are of finite length. In this finite regime, ...
  • VITURBO: A Reconfigurable Architecture for Ubiquitous Wireless Networks 

    Vaya, Mani (2002-08-01)
    A run-time reconfigurable architecture for ubiquitous wireless networks has been designed and implemented. Reconfigurable architectures have the ability to change themselves dynamically thus presenting a viable proposition ...
  • VITURBO: A Reconfigurable Architecture for Viterbi and Turbo Decoding 

    Cavallaro, Joseph R.; Vaya, Mani (2003-04-20)
    A runtime reconfigurable architecture for high speed Viterbi and Turbo decoding is designed and implemented on an FPGA. The architecture can be reconfigured to decode a range of convolutionally coded data with constraint ...
  • VLSI Architectures and Rapid Prototyping Testbeds for Wireless Systems 

    Cavallaro, Joseph R. (2005-06-01)
    The rapid evolution of wireless access is creating an ever changing variety of standards for indoor and outdoor environments. The real-time processing demands of wireless data rates in excess of 100 Mbps is a challenging ...