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Noncircularity of Demodulated Radar Signal

Rafał Rytel-Andrianik
2013 International Journal of Electronics and Telecommunications  
In the paper we analyze properties of quadrature demodulators, particularly digital one, and show that the output is noncircular also if the input signal is nonstationary.  ...  Then we find sources of this noncircularity and show that they stem from transients of the low-pass demodulator filter.  ...  2) is an ideal low-pass filter with impulse response h(t) and passband [−Ω m , Ω m ], andthe frequency ω c of the demodulator is greater then onesided filter passband ω c > Ω m , then the output signal  ... 
doi:10.2478/eletel-2013-0036 fatcat:qyyhyxugejg5hnwlzuurj3yhm4

A Hardware Based Ricean Fading Radio Channel Simulator

Ahmed Badawy, Richard Wolff
2014 Wireless personal communications  
The set up process includes selecting whether the DAQ card used is digital or an analog, if it is used as an input or an output, and the name of the DAQ card.  ...  ) Board Power Phase Shifter Bandpass Filter Bandpass Filter Bandpass Filter Bandpass Filter Bandpass Filter Bandpass Filter Bandpass Filter Bandpass Filter Surface Temp  ...  /sigma; %%% Second input argument Q=marcumq(x3,x4); %%% Marcum Q-Function CDF=1-Q; %%% PLOTTING THE PDF AND CDF figure (1) plot(r,PDF,'k','linewidth',1.5),grid on figure (2) plot(r,CDF,'k','linewidth  ... 
doi:10.1007/s11277-014-2217-x fatcat:yxr4h5bymbbk3esrgn6zgbxini

An Introduction to Statistical Signal Processing

Rudolf H Riedi
2006 Journal of the American Statistical Association  
For example, linear filter input/output relations are carefully developed for discrete time and then the continuous time analogs are obtained by replacing sums with integrals.  ...  Thus the evaluation of the pdf of the sum of two independent continuous random variables is the same as the evaluation of the output of a linear system with an input signal f X and an impulse response  ...  The product of an m × n matrix and an n-dimensional vector y = Ax is an m dimensional vector with components that is, the inner product of x and the ith row of A.  ... 
doi:10.1198/jasa.2006.s133 fatcat:dy3ijrdlfjhonipepzidwa66by

An Introduction to Statistical Signal Processing

Errol C Caby
2006 Technometrics  
For example, linear filter input/output relations are carefully developed for discrete time and then the continuous time analogs are obtained by replacing sums with integrals.  ...  Thus the evaluation of the pdf of the sum of two independent continuous random variables is the same as the evaluation of the output of a linear system with an input signal f X and an impulse response  ...  The product of an m × n matrix and an n-dimensional vector y = Ax is an m dimensional vector with components that is, the inner product of x and the ith row of A.  ... 
doi:10.1198/tech.2006.s436 fatcat:apf5pfyfqzgtbiq7s5ydbpxj3a

Introduction to Statistical Signal Processing [chapter]

Abdelhak M. Zoubir
2014 Academic Press Library in Signal Processing  
For example, linear filter input/output relations are carefully developed for discrete time and then the continuous time analogs are obtained by replacing sums with integrals.  ...  Thus the evaluation of the pdf of the sum of two independent continuous random variables is the same as the evaluation of the output of a linear system with an input signal f X and an impulse response  ...  The product of an m × n matrix and an n-dimensional vector y = Ax is an m dimensional vector with components that is, the inner product of x and the ith row of A.  ... 
doi:10.1016/b978-0-12-411597-2.00001-1 fatcat:4ubg2qgjfnhqxmdmnpejmxglay

Bi-phase locking — a tool for probing non-linear interaction in the human brain

F. Darvas, J.G. Ojemann, L.B. Sorensen
2009 NeuroImage  
We present a novel method for detecting frequency-frequency coupling between the electrical output of cortical areas as measured by electrocorticography (ECoG), electroencephalography (EEG) and magnetoencephalography  ...  We demonstrate our method for event related ECoG data recorded from the motor cortex of an epileptic patient, who performed a cued finger movement task.  ...  pdf and cdf exists.  ... 
doi:10.1016/j.neuroimage.2009.01.034 pmid:19457390 pmcid:PMC2778057 fatcat:fghr45mpf5cnpag4dsazjzg44u

Fast convolutive blind speech separation via subband adaptation

2003 2003 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (IEEE Cat. No.03TH8684)  
pl) is equal to the pdf of the recovered source Yi (in other words, if Pi(-) is the cumulative pdf function (cdf) of Yi), Le. then the sum becomes zero, and the joint entropy simplifies to H(z) = -I(z  ...  With PR filter banks, it is possible to obtain a perfect replica of the input at the output of a subband-based system.  ... 
doi:10.1109/aspaa.2003.1285845 fatcat:7zn6mmdwazgbhmhsge2je747ei

Optically Amplified Direct Detection With Pre- and Postfiltering: A Volterra Series Approach

Moshe Nazarathy, Betty Livshitz, Yuval Atzmon, Marco Secondini, Enrico Forestieri
2008 Journal of Lightwave Technology  
Due to the square-law nonlinearity and its interaction with the linear pre-and postfilters, the understanding of this seemingly simple structure has been elusive, gradually evolving over a succession of  ...  We present yet another quasi-analytic model for an optically amplified receiver, comprising an optical preamplifier, an optical prefilter, a photodetector, and an electrical postfilter.  ...  For bandlimited (BL) inputs, it is readily seen that the spectral extent of the weighted cross-correlation (15) is the sum of the spectral extents of the inputs.  ... 
doi:10.1109/jlt.2008.925031 fatcat:2xu7qi65azbbnal4r24od3tdz4

Image Transforms [chapter]

2011 Still Image and Video Compression with MATLAB  
For an analog image with amplitude in the range 0 -1 V, design a uniform quantizer with 256 output levels by specifying the decision boundaries and output levels.  ...  In simple terms, a scalar quantizer observes an input analog sample and outputs a numerical value. The output numerical value is a close approximation to the input value.  ...  a sparse matrix and S(m,n) has the value of the block size % at the location (m,n). % ShowPhaseDistortion.m % Illustration of the effect of non-linear % phase on the filtered image % IIR filter with non-linear  ... 
doi:10.1002/9780470886922.ch3 fatcat:gjjunlemu5alhbobqd27tec5zi

The Companion of the Enrico's Chart for Phase Noise and Two-Sample Variances [article]

Enrico Rubiola, Francois Vernotte
2022 arXiv   pre-print
In turn, the Chart is a reference card collecting the most useful concepts, formulas and plots in a single A4/A-size sheet, intended to be a staple on the desk of whoever works with these topics.  ...  Say, from μHz to GHz Fourier frequency for phase noise, and from sub μs to years integration time for variances.  ...  We thanks the users of the earlier versions of the Chart for feedback and corrections.  ... 
arXiv:2201.07109v4 fatcat:notbvnnzwff4xana4o6rd36toy

Clocking Analysis, Implementation and Measurement Techniques for High-Speed Data Links—A Tutorial

Bryan Casper, Frank O'Mahony
2009 IEEE Transactions on Circuits and Systems Part 1: Regular Papers  
The goal of this tutorial is to assist I/O circuit and system designers in developing intuitive and practical understanding of I/O clocking tradeoffs at all levels of the link hierarchy from the circuit-level  ...  The performance of high-speed wireline data links depend crucially on the quality and precision of their clocking infrastructure.  ...  ACKNOWLEDGMENT The authors would like to thank J. Jaussi, M. Mansuri, G. Balamurugan, S. Shekhar, J. Kennedy, and R. Mooney for collaboration and helpful discussions.  ... 
doi:10.1109/tcsi.2008.931647 fatcat:m2zj3kalbvad7ee5m2znin4t7u

A Comprehensive Analysis of the Performance of Gear Fault Detection Algorithms

Eric Bechhoefer, Brent Butterworth
2019 Proceedings of the Annual Conference of the Prognostics and Health Management Society, PHM  
The comparison includes residual, energy operator (and its variants), the narrowband analysis (with a comparison of bandwidth requirements), the amplitude and frequency modulation analysis, an analysis  ...  and low correlation have improved fault detection power.  ...  number of averages to perform %eo = energyOperator(x); %Inputs: % x: the TSA %Outputs: % eo: the energy operator n = length(x); data = x(:) -ones(n,1)*mean(x); %Generate the x(n-1) and x(n+1  ... 
doi:10.36001/phmconf.2019.v11i1.823 fatcat:cuqj7wt56rdgbkhfr2wsrdmbly

Inconsistent channel bandwidth estimates suggest winner-take-all nonlinearity in second-order vision

Zachary M. Westrick, Christopher A. Henry, Michael S. Landy
2013 Vision Research  
of filtered noise added to the modulation signal.  ...  The processing of texture patterns has been characterized by a model that postulates a first-stage linear filter to highlight a component texture, a pointwise rectification stage to convert contrast for  ...  Acknowledgments The work reported here was supported by NIH Grants EY08266 and EY16165. We thank Charlie Chubb and Ipek Oruç for comments on the manuscript.  ... 
doi:10.1016/j.visres.2013.01.010 pmid:23416867 pmcid:PMC3602150 fatcat:qj6dtlui7vffvcw7a76yr7ozbi

Physics-Informed Deep Learning Characterizes Morphodynamics of Asian Soybean Rust Disease [article]

Henry Cavanagh, Andreas Mosbach, Gabriel Scalliet, Rob Lind, Robert G. Endres
2021 arXiv   pre-print
Here, we introduce a novel framework that can characterize shape changes (morphodynamics) for cell-drug interactions directly from images, and use it to interpret perturbed development of Phakopsora pachyrhizi  ...  We discover a variety of landscapes, describing phenotype transitions during growth, and identify possible perturbations in the tip growth machinery that cause this variation.  ...  This work was funded by the Biotechnology and Biological Sciences Research Council (grant number BB/M011178/1) and Syngenta provided financial and technical support in the form of an iCASE studentship  ... 
arXiv:2110.07345v1 fatcat:u6v7wpatj5g7tbdmxzvujdevpq

Information-theoretic analysis of MIMO channel sounding [article]

Daniel S. Baum, Helmut Bölcskei
2007 arXiv   pre-print
The large majority of commercially available multiple-input multiple-output (MIMO) radio channel measurement devices (sounders) is based on time-division multiplexed switching (TDMS) of a single transmit  ...  Overestimation is caused by phase noise (and to a lesser extent frequency offset) leading to an increase of the MIMO channel rank.  ...  ADC, DAC, MIX, MPU, BPF, and CLK stand for analog-todigital converter, digital-to-analog converter, mixer, multiplexing unit, bandpass filter, and (reference) clock, respectively.  ... 
arXiv:0709.1441v1 fatcat:2hqbspeugvdkrpnvreedbjagsa
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