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Topic: Discrete signal

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	Joy of Convolution (Discrete Time) (Site not responding. Last check: 2007-10-31)
		The signal h[n], assumed known, is the response of thesystem to a unit-pulse input.
		The convolution summation has a simple graphical interpretation.First, plot h[k] and the "flipped and shifted" x[n - k]on the k axis, where n is fixed.
		Second, multiply thetwo signals to obtain a plot of the summand sequence indexed by k.Summing the values of this sequence with respect to kyields y[n].
	www.jhu.edu /~signals/discreteconv (184 words)

	ITCN \| SystemTrace Discrete Signal Monitor
		The individual signals are carried on either individual wires with a common ground, or differentially on wire pairs.
		The module is either a table-top or rack mount unit with a front panel containing an array of connectors for discrete signal input.
		This allows various discrete signal input connectors to be used on a single probe card without modification to the underlying hardware.
	www.itcninc.com /discretes.htm (527 words)

	Discrete-Time Fourier Series
		This discrete-time Fourier series representation provides notions of frequency content of discrete-time signals, and it is very convenient for calculations involving linear, time-invariant systems because complex exponentials are eigenfunctions of LTI systems.
		You can enter the magnitude and phase spectra with the mouse, and then observe the phasor frequency components and the generation of the signal from these frequency components. Or you can enter a signal x[n] with the mouse and observe the corresponding frequency spectra and the generation of the signal from the phasor frequency components.
		Only one period of the signal and one repetition of the spectra are shown.
	www.jhu.edu /~signals/discretefourier/index.htm (468 words)

	FNF: SIGNAL and SIGN SOURCE: Signal (information theory) - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-10-31)
		The signal is transmitted to the receiving telephone by wires; and at the receiver it is reconverted into sounds.
		Conversely, usage of signal in reference to a process that generates a transmitted sequence of states in a communications channel implies that this process is stochastic.
		In the mathematical abstraction, the domain of a continuous-time (CT) signal is the set of real numbers (or some interval thereof), whereas the domain of a discrete-time signal is the set of integers (or some interval).
	www.hi.is /~joner/eaps/signal.htm (1419 words)

	Discrete-Time Signals & Digital Filtering (Site not responding. Last check: 2007-10-31)
		Note that while this representation for a delay element is common and widely accepted in the signal processing community, the specification of delay in terms of powers of z is a z-domain characterization (to be described below) while the block diagram itself is a time-domain representation.
		Before a signal is applied to the input of a digital filter, the filter's internal ``state'' is assumed equal to zero.
		However, when a sinusoidal signal is first applied to the input of a digital filter, the output initially exhibits a region of transition (referred to as its transient response).
	www.music.mcgill.ca /~gary/614/week1/signals.html (1302 words)

	Discrete Fourier Transform
		The analog signal is sampled and quantized in an ADC and fed to a DSP as a sequence of numbers.
		Since sampling is multiplication of x(t) with sampling signal s(t) in time domain, it results in the convolution of the signal spectrum with the spectrum of s(t), which is a series of harmonics of Ƥs as shown in Figure 6(b).
		Thus, we consider one period of the final discrete spectrum as the discrete Fourier transform of one period of the discrete periodic signal.
	www.rfdesign.com /mag/radio_understanding_discrete_fourier/index.html (2021 words)

	Non-Integer Time Shifting of Discrete Time Signal and Its Use in Beam Forming Denoising
		That is to say we want to know the value of the original continuous signal at some points, which are not sampled, from the discrete signal that is generated from sampling the continuous signal.
		From Nyquist sampling theorem, we know that the continuous signal can be recovered from the discrete signal generated from sampling that continuous signal, if the sampling frequency is larger that the two times of the highest frequency of the continuous signal.
		The SNR (Signal to Noise Ratio) of the kth sensor is:
	www.ele.uri.edu /~hanx/ArraySignalPoc.htm (570 words)

	Discrete-Time Signal Metrics (Site not responding. Last check: 2007-10-31)
		Signal variance is equal to signal power with its mean removed.
		It is relatively easy to analytically determine the signal metrics for a sinusoidal signal.
		In signal processing, the maximum signal amplitude is typically chosen as the reference amplitude.
	www.music.mcgill.ca /~gary/307/week1/metrics.html (618 words)

	Definition of a Signal
		The signals and gain factors (vectors and scalars) may be either real or complex, as applications may require.
		Thus, a signal mix is represented mathematically as a linear combination of vectors.
		Since signals in practice can overflow the available dynamic range, resulting in clipping (or ``wrap-around''), it is not normally true that the space of signals used in practice is closed under linear combinations (mixing).
	ccrma-www.stanford.edu /~jos/filters/Definition_Signal.html (339 words)

	Discrete-Time Signals
		One of the fundamental results of signal theory will detail conditions under which an analog signal can be converted into a discrete-time one and retrieved without error.
		For symbolic-valued signals, the approach is different: We develop a common representation of all symbolic-valued signals so that we can embody the information they contain in a unified way.
		Examination of a discrete-time signal's plot, like that of the cosine signal shown in figure 1, reveals that all signals consist of a sequence of delayed and scaled unit samples.
	cnx.org /content/m0009/latest (910 words)

	Understanding digital signal processing's frequency domain
		The short journey to understanding the math and notation of discrete spectra begins by discussing the frequency-domain ambiguity associated with discrete signals.
		Next, coax cables labeled ‘cosine’ for the cosine signal and ‘sine’ for the sinewave signal are connected to the generators' output connectors and ran down the hall to their destination.
		For discrete signals, frequency is measured in radians/sample.” Redrawing the spectrum from Figure 11(b) illustrates the normalized angle and normalized frequency axis representations in Figure 13.
	rfdesign.com /mag/radio_understanding_digital_signal (3825 words)

	Signal Classifications and Properties (Site not responding. Last check: 2007-10-31)
		It should be noted that some discussions like energy signals vs. power signals have been designated their own module for a more complete discussion, and will not be included here.
		In contrast to this, a discrete-time signal is often created by using the sampling theorem to sample a continuous signal, so it will only have values at equally spaced intervals along the time axis.
		A deterministic signal is a signal in which each value of the signal is fixed and can be determined by a mathematical expression, rule, or table.
	cnx.org /content/m10057/latest (789 words)

	Amazon.fr : Discrete-Time Signal Processing: Livres en anglais: Alan V. Oppenheim,Ronald W. Schafer,John R. Buck (Site not responding. Last check: 2007-10-31)
		This is the standard text for introductory advanced undergraduate and first-year graduate level courses in signal processing.
		If you have this background, the book forms an up-to-date and self-contained introduction to discrete-time signal processing that is appropriate for students and researchers.
		By focusing on the general and universal concepts in discrete-time signal processing, it remains vital and relevant to the new challenges arising in the field - without limiting itself to specific technologies with relatively short life spans.
	amazon.fr /Discrete-Time-Signal-Processing-Alan-Oppenheim/dp/0137549202 (556 words)

	Convolution - Discrete time
		We know that any discrete-time signal can be represented by a summation of scaled and shifted discrete-time impulses, see (Reference).
		Since we are assuming the system to be linear and time-invariant, it would seem to reason that an input signal comprised of the sum of scaled and shifted impulses would give rise to an output comprised of a sum of scaled and shifted impulse responses.
		Since any discrete-time signal is just a sum of scaled and shifted discrete-time impulses, we can find the output from knowing the input and the impulse response.
	cnx.org /content/m11539/latest (839 words)

	The Discrete Fourier Transform
		In effect, this approach reduces the complexity of calculating the DFT of a signal from O(N-squared) to O(n lg n) by reducing the number of operations needed to calculate the N roots of unity in the complex plane.
		In the frequency-domain, the dilution of a signal corresponds to the duplication of the signal's spectrum while a time shift corresponds to a multiplication of the spectrum by an imaginary exponential--a sinusoid.
		The spectrum of the original signal is built by performing the butterfly operation on points from spectra of decomposed signals until all of the points have been synthesized into the final spectrum.
	www.cs.unc.edu /~parente/igv/hw3/parente_hw3.html (1208 words)

	Amazon.ca: Discrete-Time Signal Processing: Books: Alan V. Oppenheim,Ronald W. Schafer,John R. Buck (Site not responding. Last check: 2007-10-31)
		Presents the knowledge necessary for an appreciation of the wide scope of applications for discrete-time signal processing and a foundation for contributing to future developments in this technology.
		Almost every mathematical concept/technique used in this book was already covered by the prerequisite text by Oppenheim, "Signals and Systems." It would seem that a subject so entrenched with complex numbers and polynomials could be taught in such a manner that would include theorems and concepts from these well-established mathematical disciplines.
		The sections on random signals do introduce new concepts, but they were only put in as a quick review of concepts meant to be studied in a random processes class.
	amazon.ca /Discrete-Time-Signal-Processing-Alan-Oppenheim/dp/0137549202 (1251 words)

	Bookpool: Discrete-Time Signal Processing
		By focusing on the general and universal concepts in discrete-time signal processing, it remains vital and relevant to the new challenges arising in the field -- without limiting itself to specific technologies with relatively short life spans.
		Fourier Analysis of Signals Using the Discrete Fourier Transform.
		Spectrum Analysis of Random Signals Using Estimates of the Autocorrelation Sequence.
	www.bookpool.com /sm/0137549202 (443 words)

	Automatic Generation of Transform Algorithms
		Using methods from representation theory of groups and algebras, it is possible to automatically generate fast algorithms for discrete signal transforms straight from their definition using a computer program.
		The approach extends the well known concept of discrete Fourier transforms over finite groups and became feasible through two advances: A method to decompose monomial representations of solvable groups by structural recursion and a method to compute certain symmetries of matrices by combinatorial search.
		The methods have been implemented in the library AREP and used to generate fast algorithms for a class of transforms including the discrete Fourier, cosine, sine, and Hartley transform, automatically.
	www.ece.cmu.edu /~smart/papers/autgen.html (615 words)

	Discrete-Time Speech Signal Processing: Principles and Practice - $85.00 (Site not responding. Last check: 2007-10-31)
		Signal Estimation from the Modified STFT or STFTM.
		My goals in this book are to provide an intensive tutorial on the principles of discrete-time speech signal processing, to describe the state-of-the-art in speech signal processing research and its applications, and to pass on to the reader my continued wonder for this rapidly evolving field.
		For example, a one-semester course on discrete-time speech signal processing could be taught with an emphasis on fundamentals using Chapters 2-9.
	www.phptr.com /title/013242942X (914 words)

	Amazon.com: Discrete-Time Signal Processing (Prentice Hall Signal Processing Series): Books: Alan V. Oppenheim,Ronald ... (Site not responding. Last check: 2007-10-31)
		You need firm grounding in calculus, signals and systems to be close to even understand what the authors intend to say.
		This book addresses discrete time signal processing issues in an ordinary fashion and doesn't cover more advanced topics like wavelets or statistical signal processing.
		This is because digital signals are very limited in their structure and analog signals are very necessary to give digital more expression and freedom.
	amazon.com /Discrete-Time-Signal-Processing-Prentice-Hall/dp/013216292X (1812 words)

	Discrete time signals (Site not responding. Last check: 2007-10-31)
		The signals and relations presented in this module are quite similar to those in the Analog signals module.
		Generally a time discrete signal is a sequence of real or complex numbers.
		The unit sample is a signal which is zero everywhere except when its argument is zero, then it is equal to 1.
	cnx.org /content/m11476/latest (400 words)

	Discrete Systems and Digital Signal Processing w/ MATLAB (Site not responding. Last check: 2007-10-31)
		Discrete linear systems is a broad area, and those studying the subject need and deserve a dedicated treatment.
		Discrete Systems and Digital Signal Processing with MATLAB presents all of the material needed to build a strong foundation and at the same time master the use of MATLAB for problem solving.
		The Discrete Fourier Transform and the Finite-Duration Discrete Signals
	www.scitechpub.com /elali_DisSystems.htm (626 words)

	eBay - discrete signal ..., Discrete-Time Signal Processing, Textbooks, Education items on eBay.com (Site not responding. Last check: 2007-10-31)
		Signals and systems: Continuous and discrete, Rodger E
		Methods of Discrete Signal and System Analysis by M....
		Continuous and Discrete Signals and Systems by Mandy...
	search-desc.ebay.com /search/search.dll?query=discrete+signal+...&krd=1 (260 words)

	signal quantization
		means of signals that are functions of a discrete variable and having a codomain
		approximation in the representation of a discrete-time signal.
		noise can be considered as a noise superimposed to the unquantized signal.
	www.faqs.org /docs/sp/sp-23.html (304 words)

	Discrete Synthesizer Systems
		The 3 VCOs utilize our recently developed discrete ultra-linear precision VCO submodules to attain the ultimate in harmonic content and stability.
		The signal path is finished off with our new discrete VCA circuit.
		All of this is encased in a luxurious extruded aluminum rack cabinet.
	www.discretesynthesizers.com /dsc/systms.htm (591 words)

	MATLAB Central - Newsreader - FFT of a discrete signal in Matlab (Site not responding. Last check: 2007-10-31)
		MATLAB Central - Newsreader - FFT of a discrete signal in Matlab
		MATLAB Central > comp.soft-sys.matlab > archive > FFT of a discrete signal in Matlab
		Subject: Re: FFT of a discrete signal in Matlab
	newsreader.mathworks.com /WebX?14@505.TPlObdbExYG.0@.ef30ef7 (385 words)

	Discrete-Time Signal Processing, 2nd Edition - $108.80 (Site not responding. Last check: 2007-10-31)
		THE definitive, authoritative book on DSP — ideal for those with an introductory-level knowledge of signals and systems.
		By focusing on the general and universal concepts in discrete-time signal processing, it remains vital and relevant to the new challenges arising in the field — without limiting itself to specific technologies with relatively short life spans.
		NEW—Contains a wealth of "combat tested" problems which are the best produced over decades of undergraduate and graduate signal processing classes at MIT and Georgia Tech.
	www.informit.com /title/0137549202 (399 words)

	Discrete Signal
		To present the fundamentals of discrete-time signals, systems, and modern digital processing algorithms and applications.
		The rapid advances in computer technology in recent times has had a major inpact on a variety of disciplines.
		Thus there is the need for the student to be familiar with discrete-time systems and signals.
	www.eng.uwi.tt /depts/elec/ugrad/courses/36a.html (168 words)

	ECEn 487: Introduction to Discrete-Time Signal Processing
		In this class we will learn about the theory of discrete-time processing.
		The theoretical material is reinforced by a real-time DSP laboratory, where you will program a real-time DSP system to perform some common DSP tasks.
		Digital signal processing, fast Fourier transforms, digital filter design, spectrum analysis.
	www.ee.byu.edu /class/ee487 (99 words)

	Energy Citations Database (ECD) - Energy and Energy-Related Bibliographic Citations
		Energy Citations Database (ECD) Document #6856473 - Discrete signal pickup for the monitoring system of relay protection devices
		Availability information may be found in the Availability, Publisher, Research Organization, Resource Relation and/or Author (affiliation information) fields and/or via the "Full-text Availability" link.
		Discrete signal pickup for the monitoring system of relay protection devices
	www.osti.gov /energycitations/product.biblio.jsp?osti_id=6856473 (114 words)

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