Now showing items 1299-1318 of 2128

    • Nonlinear System Identification Based on a Fock Space Framework 

      Zyla, Lou; de Figueiredo, Rui J.P. (1979-05-20)
      A method is presented for the identification of a nonlinear system represented by an operator V:E->Y, where the input space E is a separable Hilbert space over the field of complex numbers and the output space Y is the ...
    • Nonlinear Wavelet Processing for Enhancement of Images 

      Odegard, Jan E.; Lang, Markus; Guo, Haitao; Gopinath, Ramesh A.; Burrus, C. Sidney (1994-05-20)
      In this note we apply some recent results on nonlinear wavelet analysis to image processing. In particular we illustrate how the (soft) thresholding algorithm due to Donoho and Johnstone can successfully be used to remove ...
    • Nonlinear Wavelet Transforms for Image Coding 

      Claypoole, Roger L.; Davis, Geoffrey; Sweldens, Wim; Baraniuk, Richard G. (1997-11-01)
      We examine the central issues of invertibility, stability, artifacts, and frequency-domain characteristics in the construction of nonlinear analogs of the wavelet transform. The lifting framework for wavelet construction ...
    • Nonlinear Wavelet Transforms for Image Coding via Lifting 

      Claypoole, Roger L.; Davis, Geoffrey; Sweldens, Wim; Baraniuk, Richard G. (2003-12-01)
      We investigate central issues such as invertibility, stability, synchronization, and frequency characteristics for nonlinear wavelet transforms built using the lifting framework. The nonlinearity comes from adaptively ...
    • Nonlinear Wigner-Ville Spectrum Estimation using Wavelet Soft Thresholding 

      Baraniuk, Richard G. (1995-04-01)
      The large variance of the Wigner-Ville distribution makes smoothing essential for producing readable estimates of the time-varying power spectrum of noise corrupted signals. Since linear smoothing trades reduced variance ...
    • Nonlinear-Phase Maximally-Flat FIR Filter Deisgn 

      Selesnick, Ivan W.; Burrus, C. Sidney (1996-09-20)
      This paper reports a new analytic technique for the design of nonlinear-phase maximally-flat lowpass FIR filters. By subjecting the response magnitude and the group delay (individually) to differing numbers of flatness ...
    • Nonparametric prediction of mixing time series 

      Lee, Yuan Kang (1992)
      Prediction of future time-series values, based on a finite set of available observations, is a prevalent problem in many branches of science and engineering. By making the assumption that the time series is either Gaussian ...
    • Nonparametric, Low Bias, and Low Variance Time-Frequency Analysis of Myoelectric Signals 

      Farry, Kristin A; Baraniuk, Richard G.; Walker, Ian D (1995-09-01)
      The authors apply Thomson's multiple window method (see D. Thomson â Spectrum Estimation and Harmonic Analysisâ , Proc. of the IEEE, vol. 70, no. 9, p. 1055-96) to myoelectric signal time-frequency analysis for the first ...
    • Nonresonant surface enhanced Raman optical activity 

      Brinson, Bruce E. (2009)
      Nanoshells (NS) and nanoparticles (NP) are tunable plasmonic particles that can be precisely engineered for specific applications including surface enhanced spectroscopies. A new, general method for the synthesis of ...
    • Nonstationary signal classification using pseudo power signatures 

      Venkatachalam, Vidya; Aravena, Jorge.L. (1998-06-20)
      This paper deals with the problem of classification of nonstationary signals using signatures which are essentially independent of the signal length. We develop the notion of a separable approximation to the Continuous ...
    • Nonstationary signal classification using pseudo power signatures: The Matrix SVD Approach 

      Aravena, Jorge.L.; Venkatachalam, Vidya (1999-12-20)
      This paper deals with the problem of classification of nonstationary signals using signatures which are essentially independent of the signal length. This independence is a requirement in common classification problems ...
    • Nonstationary Signal Enhancement Using The Wavelet Transform 

      Venkatachalam, Vidya; Aravena, Jorge.L. (1996-03-20)
      Conventional signal processing typically involves frequency selective techniques which are highly inadequate for nonstationary signals. In this paper, we present an approach to perform time-frequency selective processing ...
    • A Normalization Scheme to Reduce Numerical Errors in Inverse Tangent comptations on a Fixed-point CORDIC Processor 

      Kota, Kishore; Cavallaro, Joseph R. (1992-05-20)
      Coordinate Rotation Digital Computer (CORDIC) is a unified arithmetic algorithm that allows efficient VLSI implementation of several elementary functions. Many special-purpose systems for real-time signal processing ...
    • A Note on the Characterization of Bivariate Densities by Conditional Densities 

      Abrahams, Julia; Thomas, John B. (1979-09-01)
      The compatibility of pairs of conditional densities and the uniqueness of the resulting bivariate densities are discussed. Examples are given involving beta, gamma, and Gaussian conditional densities.
    • A Novel Adaptive Pre-Distorter Using LS Estimation of SSPA Non-Linearity in Mobile OFDM Systems 

      Guo, Yuanbin; Cavallaro, Joseph R. (2002-05-01)
      Several LUT-based pre-distortion schemes using Saleh's model of traveling wave tube (TWT) HPA for compensation of RF non-linearity in various systems have been studied recently. In this paper we propose a novel parameter-based ...
    • Novel dual-threshold voltage FinFETs for circuit design and optimization 

      Rostami, Masoud (2011)
      A great research effort has been invested on finding alternatives to CMOS that have better process variation and subthreshold leakage. From possible candidates, FinFET is the most compatible with respect to CMOS and it has ...
    • Novel dual-Vth independent-gate FinFET circuits 

      Rostami, Masoud; Mohanram, Kartik (2010)
      This paper describes gate work function and oxide thickness tuning to realize novel circuits using dual-Vth independent-gate FinFETs. Dual-Vth FinFETs with independent gates enable series and parallel merge transformations ...
    • Novel laser-based gas sensors for trace gas detection in a spacecraft habitat 

      Leleux, Darrin Paul (2002)
      The principal objective of this research has been the development of advanced data reduction techniques and their application to real-time detection and precise concentration measurement of trace gases for use in spacecraft ...
    • 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. ...
    • Novel symmetric and asymmetric plasmonic nanostructures 

      Mirin, Nikolay A. (2010)
      Metal-dielectric nanostructures capable of supporting electromagnetic resonances at optical frequencies are the vital component of the emerging technology called plasmonics. Plasmon is the electromagnetic wave confined at ...