Signal Sampling

Sampling (signal processing) Theory. Sampling can be done for functions varying in space, time, or any other dimension, and similar results are... Practical considerations. In practice, the continuous signal is sampled using an analog-to-digital converter (ADC), a... Applications. Digital audio uses. Sampling. Sampling a continuous time signal produces a discrete time signal by selecting the values of the continuous time signal at evenly spaced points in time. Thus, sampling a continuous time signal x with sampling period T s gives the discrete time signal x s defined by x s ( n) = x ( n T s) Sampling of input signal x(t) can be obtained by multiplying x(t) with an impulse train δ(t) of period T s. The output of multiplier is a discrete signal called sampled signal which is represented with y(t) in the following diagrams: Here, you can observe that the sampled signal takes the period of impulse

Signals Sampling Techniques Impulse Sampling. Impulse sampling can be performed by multiplying input signal x (t) with impulse train Σ n = − ∞ ∞ δ (... Natural Sampling. Substitute F n value in equation 2 Substitute p (t) in equation 1 To get the spectrum of sampled... Flat Top Sampling. During. The basic principle of signal sampling is very simple: it's just a case of measuring a signal's amplitude at regular time intervals. But the process of sampling and digitising an analogue waveform requires two significant approximations to be made Sampling a continuous signal is the operation of taking samples of the signal to obtain a discrete signal, that is to say a series of numbers representing the signal, in order to store, transmit, or process the signal. Sampling takes place in the analog-to-digital conversion operation, for example in a sound or image digitization device

Sampling Signals Part 2 (5/10) - Practical Sampling Theory

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Sampling (signal processing) Da Wikipedia, l'enciclopedia libera. Per altri usi, vedere Campionamento (disambiguazione) . Rappresentazione del campionamento del segnale. Il segnale continuo è rappresentato con una linea di colore verde mentre i campioni discreti sono indicati dalle linee verticali blu sampling of the signals is the fundamental operation in signal-processing. A continuous time signal is first converted to discrete-time signal by sampling process. The sufficient number of samples of the signal must be taken so that the original signal is represented in its samples completely The answer to the first question is that Sampling is a process of breakage of continuous signal to discrete signal. In a layman definition the output of system is recorded at different intervals of time, these intervals of time may not necessarily be uniform but in this series of tutorials we will limit our discussion to only Uniform-Sampling A digital signal is different from its continous counterpart in two primary ways: It is sampled at specific time steps. For example, sound is often sampled at 44.1 kHz (or once every 0.023 milliseconds). It is quantized at specific voltage levels Signal Sampling and Reconstruction A continous-time signal x (t) is sampled at a frequency of w s rad/sec. to produce a sampled signal x s (t). We model x s (t) as an impulse train with the area of the n th impulse given by x (nT s)

Sampling (signal processing) - Wikipedi

  1. The sampling rate (SR) is the number of times a signal is read in a second (usually, 44100 or 48000 times). As a signal is sample n times in a second, the signal is sampled every 1/n seconds Spectrogram Frequency Range and Sampling Rate Frequency Range and Sample Rat
  2. Conversion of Analogue Signal (xt) to Digital Signal (xn) is known as Sampling. A continuous time signal can be represented by its samples and can be recovered back when sampling Freq (Fs) is greater than or equals to twice the message signal (Nyquist Rate)
  3. The signal sampling device is constituted of accelerometers mounted on several points on the case, sensor cables, and an intellectual monitoring unit (iMU) of WindCon placed on the nacelle. The sampling data is transferred to a CDMA Wireless Router by iMU through the Ethernet
  4. Sampling concerns taking instantaneous values of a continuous signal, physically these are the outputs of an A/D converter sampling a camera signal. Clearly, the samples are the values of the signal at sampling instants
  5. In signal processing, sampling is the reduction of a continuous-time signal to a discrete-time signal. A common example is the conversion of a sound wave (a continuous signal) to a sequence of samples (a discrete-time signal)
  6. ology: sampling - creating a discrete signal from a continuous process

10.1: Signal Sampling - Engineering LibreText

In the above picture shown the continuous signal S (t) is being sampled at different moments of time, let the ith value be S. i. (t) then the set of values of S. i. (t) from i=0 to n are called the samples of S (t). Time interval between two consecutive sampling intervals is called Sampling period or Sample interval The process of sampling an analog signal that varies in time, and how the interpretation of the results can be significantly altered by the dynamic characteristics of that signal Because the sampling process for general sets of signals is not invertible, there are numerous possible reconstructions from a given discrete time signal, each of which would sample to that signal at the appropriate sampling rate. This module will introduce some of these reconstruction schemes

Therefore, as long as the sampling frequency f 8 is greater than twice the maximum signal frequency f m *(signal, bandwidth, f m), G(w) will consist of non-overlapping repetitions of X(w). this is true, figure 3.1 (f) shows that x(t) can be recovered from its samples g(t) by passing the sampled signal x(t) through an ideal law-pass filter of bandwidth f m Hz Signal & System: Sampling Theorem in Signal and SystemTopics discussed:1. Sampling.2. Sampling Theorem.Follow Neso Academy on Instagram: @nesoacademy(https:/.. original signal was a sinusoid at the sampling frequency, then through the sampling and reconstruction process we would say that a sinusoid at a fre-quency equal to the sampling frequency is aliased down to zero frequency (DC). Thus, as we demonstrate in this lecture, if we sample the output of a sinu

Signals Sampling Theorem - Tutorialspoin

  1. Sampling in Matlab and downsampling an audio file. Generating a continuous signal and sampling it at a given rate is demonstrated here. In simulations, we may require to generate a continuous time signal and convert it to discrete domain by appropriate sampling. For baseband signal, the sampling is straight forward
  2. In digital signal processing, upsampling, expansion, and interpolation are terms associated with the process of resampling in a multi-rate digital signal processing system. Upsampling can be synonymous with expansion, or it can describe an entire process of expansion and filtering (interpolation). When upsampling is performed on a sequence of samples of a signal or other continuous function.
  3. ator can best be explained using vector dia- grams [above, view.
  4. imum rate as dictated by the sampling theorem. The number of quantization levels is 64. If the samples are encoded in binary form, the.

Signals Sampling Techniques - Tutorialspoin

Execute the sound commands separately so that you can hear the signal with the two different sample rates. % sound (x,44100) % sound (xnew,48000) Change the sample rate of a speech sample from 7418 Hz to 8192 Hz. The speech signal is a recording of a speaker saying MATLAB®. Load the speech sample Problem 1: Sampled signal vs(t) is produced by sampling CT signal v(t): sin(1000nt) cos(2000nt). 1000 2 v(t) = (1000) ( at 1. Give the Nyquist rate to avoid aliasing during sampling of v(t); 2. for signals vsi(t) and vs2(t) generated by sampling rates T1 = 1/3000 [sec] and T2 = 1/5000 [sec], respectively, plot the magnitude |Vsi(12)] = FT{vsi(t)} (i,1, 2) Signal Sampling Information on IEEE's Technology Navigator. Start your Research Here! Signal Sampling-related Conferences, Publications, and Organizations 1 Signal Sampling ATMS 320 - Fall 2011 Dr. Christopher M. Godfrey University of North Carolina at Asheville Photo: C. Godfrey Sampling Let's sample the signal at a time interval of Δt ATMS 320 - Fall 201 Sampling a Continuous-Time Signal. Most signals of our interest — wireless communication waveforms — are continuous-time as they have to travel through a real wireless channel. To process such a signal using digital signal processing techniques, the signal must be converted into a sequence of numbers. This can be done through the process of.

The sampling theorem indicates that a continuous signal can be properly sampled, only if it does not contain frequency components above one-half of the sampling rate. For instance, a sampling rate of 2,000 samples/second requires the analog signal to be composed of frequencies below 1000 cycles/second Sampling Theorem: Intuitive proof (2) Therefore, to reconstruct the original signal x(t), we can use an ideal lowpass filter on the sampled spectrum: Lowpass filter 277B This is only possible if the shaded parts do not overlap. This means that fs must be more than TWICE that of B. L8.1 P771 EA2.3- E ectronics 2 16 Jan 2020 Lecture 4 Slide 6. Baseband Sampling. Now the sampled signal contains lots of unwanted frequency components (Fs±Fm,2Fs±Fm,). If we want to convert the sampled signal back to analog domain, all we need to do is to filter out those unwanted frequency components by using a reconstruction filter (In this case it is a low pass filter) that is designed to select only those frequency components that are upto. Execute the sound commands separately so that you can hear the signal with the two different sample rates. % sound (x,44100) % sound (xnew,48000) Change the sample rate of a speech sample from 7418 Hz to 8192 Hz. The speech signal is a recording of a speaker saying MATLAB®. Load the speech sample scipy.signal.resample¶ scipy.signal.resample (x, num, t = None, axis = 0, window = None, domain = 'time') [source] ¶ Resample x to num samples using Fourier method along the given axis.. The resampled signal starts at the same value as x but is sampled with a spacing of len(x) / num * (spacing of x).Because a Fourier method is used, the signal is assumed to be periodic

The science of signal sampling MusicTec

where the function resamples the sequence x at p/q times the original sample rate. The length of the result y is p/q times the length of x.. One resampling application is the conversion of digitized audio signals from one sample rate to another, such as from 48 kHz (the digital audio tape standard) to 44.1 kHz (the compact disc standard) Sampling Techniques Basically, there are three types of sampling techniques such as: (i) Instantaneous sampling (ii) Natural sampling (iii) Flat top sampling Out of these three, instantaneous sampling is called ideal sampling whereas natural sampling and flat-top sampling are called practical sampling methods. Now, let us discuss three different types of sampling techniques in detail Pug it! F3.5. If playback doesn't begin shortly, try restarting your device. Videos you watch may be added to the TV's watch history and influence TV recommendations. To avoid this, cancel and.

Claude Shannon - Wikipedia

Sampling and reconstruction of a periodic signal Lab4Sys

  1. with the signal ).] The above equation represents a very important and elegant result. It states that, in the frequency domain, the sampled signal is essentially a superposition of shifted (by integer multiples of the sampling frequency, . ) (versions of the spectrum of the signal )
  2. ing the consequence of the modulation property in the context of the.
  3. The sampling rate is set according to the Nyquist criterion which states that it must be more than twice that of the maximum frequency component present in the analogue signal. This ensures accurate reproduction, but a much higher rate will ease the design of a vital circuit that precedes the ADC: the Anti-Aliasing filter
  4. 3. Let x ( t) be your continuous-time bandlimited signal, modeled as a WSS random process with a PSD of S x x ( Ω) in the band Ω ∈ [ − W, W], Ω in radians per second. Sampling x ( t) at the critical rate T s = π W, yields the unquantized, discrete-time sequence x [ n] = x ( n T s). Let the associted PSD with x [ n] is
  5. A decimated signal has a lower sample rate compared to its original. Decimation can be advantageous when, for example, you are transmitting a signal, creating a visual representation of a large dataset, or reducing the memory overhead when processing data. In the following pair of images, the original signal (at left) contains 1024 samples
  6. Surprisingly, we also show that, up to logarithmic factors, a universal non-uniform sampling strategy can achieve this optimal complexity for *any class of signals*. We present a simple and efficient algorithm for recovering a signal from the samples taken. For bandlimited and sparse signals, our method matches the state-of-the-art
  7. ing sampling rate for signal reconstruction. 0. sampling rate Matlab. 0. sampling a continuous time signal using MATLAB? 1. Sampling and Reconstruction of digital signal in Matlab. Hot Network Questions How to prove that a naive quantum random walk is non-unitar

Campionamento (elaborazione del segnale) - Sampling

Sampling Theorem - Electronics Pos

The sampling of analog signal is based on sampling theorem. The sampling theorem states that if f m is the maximum frequency component in the analog signal, then the information present in the signal can be represented by its sampled version provided the number samples taken per second is greater than or equal to twice the maximum frequency component sampling L8.2 p786 PYKC 3-Mar-11 E2.5 Signals & Linear Systems Lecture 13 Slide 12 Anti-aliasing filter (1) To avoid corruption of signal after sampling, one must ensure that the signal being sampled at fs is bandlimited to a frequency B, where B < fs/2. Consider this signal spectrum: After sampling: After reconstruction Sub-sampling systems take advantage of this folding or mixing function to reduce the IF frequency prior to a final digital tuner like National's CLC5903. If the desired signal Bandwidth (BW) is less than Fs/2, all of the signal information can still be recovered. A channel filter should be placed in front of the ADC to remove any undesire Whenever you're selecting an ADC, whether it is built into an MCU or as an external component, the sampling rate is a prime consideration, as it will determine how well you can reproduce a measured signal. RF applications, analog sensor boards, and other mixed-signal devices will need at least one ADC with an appropriately chosen ADC sampling rate But because their sampling rate of 12 Hertz is no longer more than double the fastest frequency in the signal if we use a 12 Hertz sampling rate, the signal is aliased to the 2 and 5 Hertz signal. 2 and 17 Hertz also passes through the same samples as does 2 and 19, 2 and 29, 2 and 31, 2 and 41, 43, 53, 55, 65

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Digital Signal Processing: Sampling and Discrete-time

Nyquist Sampling Theorem. The Nyquist Sampling Theorem states that: A bandlimited continuous-time signal can be sampled and perfectly reconstructed from its samples if the waveform is sampled over twice as fast as it's highest frequency component Signal Sounds provides the best in Analogue and Digital Synths, Eurorack Modular equipment and Music Recording Equipment for home and studio use. 25 years of experience serving Glasgow and the World. Sampling - Modular Signal Sound So, with a signal that contains 10Hz, 500Hz, and 5KHz components, the minimum sampling rate is 2 X 5KHz or 10KHz - 10,000 samples/sec. If the sampling rate of the A/D converter is capable of it, it is even better to sample at four to eight times the highest frequency. This will ensure resolving the signal's true waveform # Generate signal signal = nk. signal_simulate (frequency = [1, 3], noise = 0.01, sampling_rate = 100) # Find optimal time delay, embedding dimension and r parameters = nk. complexity_optimize (signal, show = True

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Many translated example sentences containing signal sampling - Spanish-English dictionary and search engine for Spanish translations MCS320 IntroductiontoSymbolicComputation Spring2007 MATLAB Lecture 7. Signal Processing in MATLAB Wehaveseenhowtofltdatawithpolyfltandhowtodesignshapeswithspline Question: EXAMPLE 6.1.2 Sampling And Reconstruction Of A Nonbandlimited Signal Consider The Following Continuous-time Two-sided Exponential Signal: 1 *.(0) 2 X (F 0.5 1 Xx() = -4X (F) = 2A A>0 A2 + (21 F)? (a) Determine The Spectrum Of The Sampled Signal X(n) = Xa(n7). (b) Plot The Signals X (1) And X(n) = X.(nT), For T = 1/3 Sec And T = 1 Sec, And Their Spectra.. The Effect of Sampling on the FFT 2015-04-20 Category: Engineering. I wrote this material for a digital signals processing assignment in fourth year university. I am re-posting it here in response to a Stack Exchange question.. The FFT in 30 second Signal Sampling - IEEE Technology Navigator. Connecting You to the IEEE Universe of Informatio

In some cases using lower resolution sampling lead to omit some parts of the original signal. So, if you need to work on all parts of the signal I think you should use high resolution sampled signals Compra Oversampling: Oversampling, Signal Processing, Sampling (signal processing), Signal (information theory), Sampling Frequency. SPEDIZIONE GRATUITA su ordini idone

Chapter 5 Sampling and Quantization Often the domain and the range of an original signal x(t) are modeled as contin- uous. That is, the time (or spatial) coordinate t is allowed to take on arbitrary real values (perhaps over some interval) and the value x(t) of the signal itself is allowed to take on arbitrary real values (again perhaps within some interval) sampled signal so modelled. Moreover, the analysis of this expression showed that aliases and folding effects cannot occur in the sampled signal spectrum, provided that the signal sampling is performed ideally. Keywords—Signal sampling, occurrence of spectrum aliasing and folding, modelling of signal sampling operation, Kronecke sampling theory, Theory and basic laws of sampling Those mathematical tools and procedures have been written in the previous chapters - discussion of linear system properties - to be applied for describing and characterizing of the shift invariant quantized i.e. discretized system in the followings. Operation of quantization is not a linear transformation Sampling Signals on Graphs: From Theory to Applications. Abstract: The study of sampling signals on graphs, with the goal of building an analog of sampling for standard signals in the time and spatial domains, has attracted considerable attention recently. Beyond adding to the growing theory on graph signal processing (GSP), sampling on graphs has. Sampling DIGITAL SIGNALS - SAMPLING AND QUANTIZATION somehow 'guess', what value the signal could probably take on in between our samples. Interpolation is the process of 'guessing' signal values at arbitrary instants of time, which fall - in general - in between the actual samples

Signals - Quantization and Sampling

Correlated Double Sampling. When it comes to CCD signal processing, the most important topic is correlated double sampling (CDS). This term refers to a procedure in which a waveform is repeatedly sampled at two different moments, with each pair of samples being used to produce a single data point Also called a sample rate.Typically expressed in samples per second, or hertz (Hz), the rate at which samples of an analog signal are taken in order to be converted into digital form. A PC's sound card typically will sample a received analog signal, such as through a microphone, and digitize it for use by the computer. A higher sampling rate provides a better quality reproduction than a. To convert a signal from continuous time to discrete time, a process called sampling is used. The value of the signal is measured at certain intervals in time. Each measurement is referred to as a sample. (The analog signal is also quantized in amplitude, but that process is ignored in this demonstration

Signal Sampling and Reconstructio

To study the significance of sampling frequency, the sampling frequency of the given speech signal can be reduced at different levels and the waveform and spectra can be studied at each level. The Scilab code given below takes input speech signal sampled at 44.1 kHz and resamples it to a sampling frequency of 16 kHz and plots spectra of selected segments SAMPLING: In signal processing, sampling is the reduction of a continuous signal to a discrete signal. A common example is the conversion of a sound wave (a continuous signal) to a sequence of samples (a discrete-time signal) 1 Sampling and Reconstruction 1 1.1 Introduction, 1. B.2 Low-Frequency Noise Generators∗, 724 B.3 1/f Noise Generators. As a result, the book's emphasis is more on signal processing than discrete-time system theory, although the basic principles of the latter are adequately covered First, before change the sampling frequency of a signal using well-known tools on Matlab, it must be checked the amplitude range and if its endpoint are close to zero values RF Sampling Direct RF sampling moves the A/D and D/A conversion process closer to the antenna such that the converter directly samples the RF signal as shown below. With this technology, Moore's Law can be applied to frequency selection and down conversion, traditionally implemented using analog signal processing techniques

Sampling and Aliasing Overview The sampling theorem states that a band-limited continuous-time signal, with highest frequency (or bandwidth) equal to B Hz, can be recovered from its samples provided that the sampling frequency, denoted by Fs, is greater than or equal to 2B Hz (or samples per second) The study of sampling signals on graphs, with the goal of building an analog of sampling for standard signals in the time and spatial domains, has attracted considerable attention recently. Beyond adding to the growing theory on graph signal processing (GSP), sampling on graphs has various promising applications. In this article, we review the current progress on sampling ove Note: Examples of signal sampling are (a) obtaining the instantaneous phase in phase-shift keying transmission and (b) obtaining the instantaneous amplitude of an analog signal. See also amplitude , analog signal , instantaneous , parameter , phase , phase-shift keying , process , sampling rate , sequence , signal , signal parameter , signal sample , time , transmission , value

Introduction - Sampling : Signal Digitalizatio

  1. Signal Processing incorporates all aspects of the theory and practice of signal processing.It features original research work covering novel signal processing tools as well as tutorial and review articles with a focus on the signal processing issues
  2. general result to derive a sampling theorem for bandlimited graph signals in the framework of discrete signal processing on graphs. By imposing a specific structure on the graph, graph signals reduce to finite discrete-time or discrete-space signals, effectively ensuring that the proposed sampling theory works for such signals
  3. One of the central tenets of signal processing is the Shannon/Nyquist sampling theory: the number of samples needed to capture a signal is dictated by its bandwidth. Very recently, an alternative theory of compressive samplinghas emerged. By using nonlinear recovery algorithms (based on convex optimization), super-resolved signals and images can.
  4. es the number of values which can be expressed, just as a 3 digit number in the usual 10-based number system can take more values than a 2 digit number. The number of bits deter

Sampling: When a continuous signal is sampled, it becomes a set of discrete samples . If the sampling frequency is samples per second (Hz), then the sampling period, the time interval between two consecutive samples, is seconds. The nth sample is: We. As the Nyquist-Shannon sampling theorem states you can only represent frequencies up to f/2 using a samplings rate of f. This is still true using IQ Data, but since you now can represent negative frequencies the signal spans [-f/2..+f/2] compared to [0..+f/2] using a ℝeal signal, hence th Sampling Tessellation Introduction to Signal and Image Processing March 29th, 2016 Tessellation (8) Definition Tessellations are patterns that cover a plane with repeating figures so there is no overlapping or empty spaces Sampling is best performed following a regular tessellation of the image: 1. Brightness is integrated over cells of same. Sampling is a process used in statistical analysis in which a predetermined number of observations are taken from a larger population. The methodology used to sample from a larger population. How do I bias an AC signal for sampling? Ask Question Asked 6 years, 1 month ago. Active 1 month ago. Viewed 14k times 3. 2 \$\begingroup\$ I want to sample a 10Vp-p 50Hz sinusoidal signal. My ADC can only sample between 0V and 5V, so I need to bias the voltage around 2.5V. I only have a.

Sampling Analogue Signal Tutorial MATLAB : 8 Steps

  1. Sampling Rate: 10 kHz ~ 50 kHz Sampling Signal Format: TTL Waveform Audio Signal Frequency: 1 kHz ~ 2 kHz. Audio Input Format: Sine Waveform Sampling Methods: Sample and Hold, Flat Top Sampling, Natural Sampling Low-pass Filter -3 dB Frequency: 1 kHz ~ 3 kHz Seven Built-in Fault Shootings
  2. 11/16/2010 Signal Sampling.doc 3/7 Jim Stiles The Univ. of Kansas Dept. of EECS Q: So if we sample at Nyquist, the reconstructed signal v out t will be exactly the same as the input signal in v t ?? A: Theoretically yes, but there is a very practical limitation that makes this exact reconstruction unachievable. An exact reconstruction would require that both th
  3. Signal Sampling. A continuous signal can be sampled at a rate (sampling frequency) of , where the sampling period is the time interval between two consecutive samples, the resulting samples are A discrete version of the signal is a sequence of these samples expressed a
  4. Sampling: Before digital recording took over the audio and video industries, everything was recorded in analog . Audio was recorded to devices like cassette tapes and records. Video was recorded to Beta and VHS tapes. The media was even edited in analog format, using multichannel audio tapes (such as 8-tracks) for music, and film reels for.

A signal-analyzing unit has a sampling path and a reference path both receiving a digital test signal. The sampling path has a first comparator for comparing the test signal against a first threshold value and providing a first comparison signal, and a first sampling device receiving as input the first comparison signal and a first timing signal Digital Signal Processing Sampling Theorem 2) f s = 10 x(t) can be recovered by sharp LPF 3) f s = 5 x(t) can not be recovered Compare f s with 2B in each case Slide 24 Digital Signal Processing Anti-aliasing Filter To avoid corruption of signal after sampling, one must ensure that the signal being sampled at f s is band-limited to a frequency. In signal processing, sampling is the reduction of a continuous signal to a discrete signal.A common example is the conversion of a sound wave (a continuous signal) to a sequence of samples (a discrete-time signal).. A sample is a value or set of values at a point in time and/or space.. A sampler is a subsystem or operation that extracts samples from a continuous signal

Figure 1: Sampling Process (a) Sampler (b) Analog Signal Sampled Output. Sampling in digital systems can be of many types. For instance, a sampler may have a non-uniform a periodic, cyclic variable or random sampling rate. Also a digital system can have number of samplers with different sampling rates Электротехника: дискретизация сигнал Bandpass sampling time is more i.e. speed requirement is less because it will store less sample compared to low pass sampling . it will decrease the memory requirement , because it store less sample when compared to low pass sampling Refer the Topic Wise Question for Sampling Theorem and Applications Signal and System

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Analyzing signal sampling audio. Learn more about sampling audio signal, signal Sampling Theorem • A signal can be reconstructed from its samples, if the original signal has no frequencies above 1/2 the sampling frequency - Shannon • The minimum sampling rate for bandlimited function is called Nyquist rate A signal is bandlimited if its highest frequency is bounded. The frequency is called the bandwidth signal as shown, then after sampling the signal energy would appear to fold back at 1=2 the sampling rate. This can be used to demonstrate part of the Nyquist-Shannon sampling theorem: if the original signal were band limited to 1=2 the sampling rate then after aliasing there would be no overlapping energy, and thus no ambiguity caused by.

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