Now showing items 589-608 of 1126

    • 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 ...
    • Multi-Rate High-Throughput LDPC Decoder: Tradeoff Analysis between Decoding Throughput and Area 

      Radosavljevic, Predrag; de Baynast, Alexandre; Karkooti, Marjan; Cavallaro, Joseph R. (2006-09-01)
      In order to achieve high decoding throughput (hundreds of MBits/sec and above) for multiple code rates and moderate codeword lengths (up to 2.5K bits), several decoder solutions with different levels of processing parallelism ...
    • 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 ...
    • Multifractal Formalism for Infinite Multinomial Measures 

      Riedi, Rudolf H.; Mandelbrot, Benoit (1995-01-20)
      There are strong reasons to believe that the multifractal spectrum of DLA shows anomalies which have been termed left sided. In order to show that this is compatible with strictly multiplicative structures Mandelbrot et ...
    • Multifractal products of stochastic processes: construction and some basic properties 

      Mannersalo , Petteri; Riedi, Rudolf H.; Norros , Ilkka (2002-01-15)
      In various fields, such as teletraffic and economics, measured times series have been reported to adhere to multifractal scaling. Classical cascading measures possess multifractal scaling, but their increments form a ...
    • Multifractal Properties of TCP Traffic: a Numerical Study 

      Riedi, Rudolf H.; Vehel, Jacques (1997-10-20)
      We analyze two traces of TCP--traffic recorded at the gateway of a LAN corre­ sponding to two hours at Berkeley and to eight hours at CNET labs respectively. We are mainly interested in a multifractal approach, which we ...
    • Multifractal Signal Models with Application to Network Traffic 

      Crouse, Matthew; Riedi, Rudolf H.; Ribeiro, Vinay Joseph; Baraniuk, Richard G. (1998-08-01)
      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 ...
    • A Multifractal Wavelet Model for Positive Processes 

      Crouse, Matthew; Riedi, Rudolf H.; Ribeiro, Vinay Joseph; Baraniuk, Richard G. (1998-10-01)
      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 ...
    • 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 ...
    • Multifractals and Wavelets: A potential tool in Geophysics 

      Riedi, Rudolf H. (1998-01-01)
      The study of fractal quantities and structures exhibiting highly erratic features on all scales has proved to be of outstanding significance in various disciplines. While scaling phenomena are pervasive in natural and ...
    • 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 ...
    • Multilevel Codes and Iterative Multistage Decoding: Rate Design Rules and Practical Considerations 

      Borran, Mohammad Jaber; Aazhang, Behnaam (2000-09-20)
      It is well known that MultiLevel Coding (MLC) and MultiStage Decoding (MSD) suffice to approach capacity if the rates at different levels are chosen appropriately. In most of the practical cases, however, the rate design ...
    • Multilevel coding of broadcast video over wirless channels 

      Cakareski, Zeljko; Ahmed, Nasir; Dhar, Aditya; Aazhang, Behnaam (2002-05-20)
      This paper addresses the problem of broadcasting video over wireless channels. In such a scenario, different end users perceive the video signal through channels with different quality. We propose a source-channel coding ...
    • Multilingual Open-Content Signal Processing Laboratories in Connexions 

      Frantz, Patrick; Baraniuk, Richard G.; Choi, Hyeokho; Jones, Douglas L. (2004-11-01)
      Due to inherent factors like a small and fragmented market and rapid hardware obsolescence, the conventional textbook is inadequate for DSP laboratory education. Freely available open-content materials that enable and ...
    • Multimodal snapshot spectral imaging for oral cancer diagnostics: a pilot study 

      Bedard, Noah; Schwarz, Richard A.; Hu, Aaron; Bhattar, Vijayashree; Howe, Jana; Williams, Michelle D.; Gillenwater, Ann M.; Richards-Kortum, Rebecca; Tkaczyk, Tomasz S. (2013)
      Optical imaging and spectroscopy have emerged as effective tools for detecting malignant changes associated with oral cancer. While clinical studies have demonstrated high sensitivity and specificity for detection, current ...
    • Multiphysics model of a rat ventricular myocyte: A voltage-clamp study 

      Krishna, Abhilash; Valderrábano, Miguel; Palade, Philip T; Clark, John W Jr (0001-10-30)
      Background: The objective of this study is to develop a comprehensive model of the electromechanical behavior of the rat ventricular myocyte to investigate the various factors influencing its contractile response. Methods: ...
    • Multiple access schemes over multipath fading channels 

      Erkip, Elza; Aazhang, Behnaam (1998-10-20)
      We compare the performance of different accessing schemes for communication over an additive white Gaussian noise multiple access channel with multipath fading. We assume that only the receiver can track the channel ...
    • Multiple Basis Wavelet Denoising using Besov Projections 

      Choi, Hyeokho; Baraniuk, Richard G. (1999-10-01)
      Wavelet-based image denoising algorithm depends upon the energy compaction property of wavelet transforms. However, for many real-world images, we cannot expect good energy compaction in a single wavelet domain, because ...
    • Multiple wavelet basis image denoising using Besov ball projections 

      Choi, Hyeokho; Baraniuk, Richard G. (2004-09-01)
      We propose a new image denoising algorithm that exploits an image's representation in multiple wavelet domains. Besov balls are convex sets of images whose Besov norms are bounded from above by their radii. Projecting an ...
    • Multiple Window Time Frequency Analysis 

      Bayram, Metin; Baraniuk, Richard G. (1996-06-01)
      We propose a robust method for estimating the time-varying spectrum of a non-stationary random process. Our approach extends Thomson's powerful multiple window spectrum estimation scheme to the time-frequency and time-scale ...