Now showing items 533-552 of 1068

  • Maximum Likelihood Multipath Channel Parameter Estimation in CDMA Systems Using Antenna Arrays 

    Sengupta, Chaitali; Cavallaro, Joseph R.; Aazhang, Behnaam (1998-09-20)
    The problem addressed in this paper is the estimation of the chan-nel parameters in a Code Division Multiple Access (CDMA) communication system, in the presence of multipath effects and multiple sensors at the base station ...
  • Maximum Weight Basis Decoding of Convolutional Codes 

    Das, Suman; Erkip, Elza; Cavallaro, Joseph R.; Aazhang, Behnaam (2000-06-20)
    The effectiveness of the convolutional code increases with the constraint length of the code. Unfortunately the decoding complexity of Viterbi algorithm grows exponentially with the constraint length. In this paper we ...
  • Maximum Weight Basis Decoding of Convolutional Codes 

    Das, Suman; Erkip, Elza; Cavallaro, Joseph R.; Aazhang, Behnaam (2002-11-01)
    In this paper we describe a new suboptimal decoding technique for linear codes based on the calculation of maximum weight basis of the code. The idea is based on estimating the maximum number locations in a codeword which ...
  • A Maxwell’s fish eye lens for the terahertz region 

    Liu, Jingbo; Mendis, Rajind; Mittleman, Daniel M. (2013-07-15)
    We implement a two-dimensional Maxwell’s fish eye lens using a waveguide-based artificial dielectric. The Maxwell’s fish eye lens consists of two metallic cylindrical plates sandwiching a free-space region, with the inner ...
  • 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 ...
  • Measurement of Filling-Factor-Dependent Magnetophonon Resonances in Graphene Using Raman Spectroscopy 

    Kim, Y.; Poumirol, J. M.; Lombardo, A.; Kalugin, N. G.; Georgiou, T.; Kim, Y. J.; Novoselov, K. S.; Ferrari, A. C.; Kono, J.; Kashuba, O.; Fal’ko, V. I.; Smirnov, D. (2013-05-29)
    We perform polarization-resolved Raman spectroscopy on graphene in magnetic fields up to 45 T. This reveals a filling-factor-dependent, multicomponent anticrossing structure of the Raman G peak, resulting from magnetophonon ...
  • Measurements vs. Bits: Compressed Sensing meets Information Theory 

    Sarvotham, Shriram; Baron, Dror; Baraniuk, Richard G. (2006-09-01)
    Compressed sensing is a new framework for acquiring sparse signals based on the revelation that a small number of linear projections (measurements) of the signal contain enough information for its reconstruction. The ...
  • Measuring Time-Frequency Information and Complexity using the Renyi Entropies 

    Baraniuk, Richard G.; Flandrin, Patrick; Michel, Olivier (1995-09-01)
    In search of a nonparametric indicator of deterministic signal complexity, we link the Renyi entropies to time-frequency representations. The resulting measures show promise in several situations where concepts like the ...
  • Measuring Time-Frequency Information Content using the Renyi Entropies 

    Baraniuk, Richard G.; Flandrin, Patrick; Janssen, A. J. E. M.; Michel, Olivier (2001-05-01)
    The generalized entropies of Renyi inspire new measures for estimating signal information and complexity in the time-frequency plane. When applied to a time-frequency representation (TFR) from Cohen's class or the affine ...
  • Memory Access Scheduling 

    Rixner, Scott; Dally, William J.; Kapasi, Ujval J.; Mattson, Peter; Owens, John D. (2000-06-20)
    The bandwidth and latency of a memory system are strongly dependent on the manner in which accesses interact with the "3-D" structure of banks, rows, and columns characteristic of contemporary DRAM chips. There is nearly ...
  • Mentoring by Design: Integrating Medical Professional Competencies into Bioengineering and Medical Physics Graduate Training 

    Woods, Kendra V.; Peek, Kathryn E.; Richards-Kortum, Rebecca (2014)
    Many students in bioengineering and medical physics doctoral programs plan careers in translational research. However, while such students generally have strong quantitative abilities, they often lack experience with the ...
  • Midinfrared third-harmonic generation from macroscopically aligned ultralong single-wall carbon nanotubes 

    Morris, D.T.; Pint, C.L.; Arvidson, R.S.; Luttge, A.; Hauge, R.H.; Belyanin, A.A.; Woods, G.L.; Kono, J. (2013)
    We report the observation of strong third-harmonic generation from a macroscopic array of aligned ultralong single-wall carbon nanotubes (SWCNTs)with intensemidinfrared radiation. Through power-dependent experiments, we ...
  • 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 ...
  • A mode-matching analysis of dielectric-filled resonant cavities coupled to terahertz parallelplate waveguides 

    Astley, Victoria; Reichel, Kimberly S.; Jones, Jonathan; Mendis, Rajind; Mittleman, Daniel M. (2012-09-07)
    We use the mode-matching technique to study parallel-plate waveguide resonant cavities that are filled with a dielectric. We apply the generalized scattering matrix theory to calculate the power transmission through the ...
  • Model-based Inverse Halftoning with Wavelet-Vaguelette Deconvolution 

    Neelamani, Ramesh; Nowak, Robert David; Baraniuk, Richard G. (2000-09-01)
    In this paper, we demonstrate based on the linear model of Kite that inverse halftoning is equivalent to the well-studied problem of deconvolution in the presence of colored noise. We propose the use of the simple and ...
  • 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 ...
  • Modeling wireless sensor and actuator networks using frame theory 

    Rozell, Chris; Johnson, Don (2005-11-01)
    Wireless sensor networks are often studied with the goal of removing information from the network as efficiently as possible. However, when the application also includes an actuator network, it is advantageous to determine ...
  • 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 ...
  • Moments and Error Expressions in Polynomial Minimum Mean Square Estimation 

    Kazakos, D.; Papantoni-Kazakos, P. (1975-05-20)
    The mathematical complexity of the minimum mean square estimators made inevitable the consideration of suboptimal solutions, such as the linear minimum mean square estimators. The compromise between performance and ...
  • 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 ...