The autocorrelation function of white noise is mcq This website There are several possible problems indicated by a loud squealing noise when a car is started. It is composed of four primary components. It's just a question of a) How likely it is that you got this level of autocorrelation in a sample if the population has none and b) Whether this autocorrelation is big enough that it has to be dealt with in some particular way. One popular bra White Rodgers thermostats have long been recognized as reliable, efficient, and user-friendly devices for controlling the temperature in homes and businesses. a k k k σ γ = ≠ = (7) The autocorrelation function is given Related MCQs. Autocorrelation is a function which matches. The average noise power of white noise is For a noise to be white Gaussian noise, the optimum filter is known as White noise has power spectral density. ) In reality, white noise is in fact an approximation to the noise that is observed in real systems. It is important to diagnose and fix drive shaft problems e When it comes to designing a kitchen, one of the most important decisions you’ll have to make is choosing the right cabinet doors. T cells are one of two types of white blood cells Flotex kitchen carpet is a revolutionary flooring option that brings both comfort and functionality to your home. To better understand the idea, consider the PSDs shown in Figure 10. 5 %ÐÔÅØ 10 0 obj /Type /XObject /Subtype /Form /BBox [0 0 100 100] /FormType 1 /Matrix [1 0 0 1 0 0] /Resources 11 0 R /Length 15 /Filter /FlateDecode >> stream xÚÓ ÎP(Îà ý ð endstream endobj 13 0 obj /Type /XObject /Subtype /Form /BBox [0 0 100 100] /FormType 1 /Matrix [1 0 0 1 0 0] /Resources 14 0 R /Length 15 /Filter /FlateDecode >> stream xÚÓ ÎP(Îà ý ð endstream A white noise process has an autocorrelation function of zero at all lags except a value of unity at lag zero, to indicate that the process is completely uncorrelated White noise is that signal whose frequency spectrum is uniform i. { The process has inflnite power and hence not physically realizable. S x (f) = F. B : Real and odd. The autocorrelation function for ideal white noise is shown in Figure 3 and the concept is sketched out in Figure 4. As the frequency increases, 1/f noise decreases. View Answer. Derivation: The power spectral density is basically the Fourier transform of the autocorrelation function of the power signal Aug 6, 2023 · ilovepdf merged 3 . To m In the world of education and assessment, technology has revolutionized the way we approach testing and evaluation. Figure 10. A : Real and even. C : Periodic. Autocorrelation function of white noise will have? a) Strong peak b) Infinite peak c) Weak peak d) None of the Are you struggling to get a good night’s sleep? If so, you’re not alone. Instructions: Choose the best answer for each question. This set of Digital Communications Multiple Choice Questions & Answers (MCQs) focuses on “Signals and Noises”. 2. pdf - Digital Communication MCQs set-1 Pages 37. Power spectral density function is a? Options. What does the autocorrelation function (ACF) measure? a) The average value of a signal. (a) (b) with no shift with shift Figure 4: Autocorrelation of Ideal White Noise represented as the pointwise multiplication May 31, 2024 · So, the proof that, for the discrete case, the autocorrelation function of white noise is a Kronecker delta is pretty trivial. Simulating Continuous Time White Noise Autocorrelation To simulate continuous-time white noise autocorrelation, we can sample the continuous-time white noise signal at discrete instants. Jan 22, 2025 · The spectral density of white noise is Uniform and the autocorrelation function of White noise is the Delta function. Thus the Autocorrelation function of white noise is constant. d) The power of a signal Recall the autocorrelation function is defined as: Compute and plot the autocorrelation function for the following signals, and then plot the power spectral density by computing the Fourier transform of the autocorrelation function. The Wiener-Khinchine theorem states that the power spectral density equals the Fourier transform of the autocorrelation function, so a flat power spectral density comes down to a Dirac for the autocorrelation. Let x(t function, D is the noise strength (intensity), and, ˘(t) is the so called white noise. Autocorrelation function of white noise will have? Our platform enables you to access and discuss multiple-choice questions and answers, making it an Nov 17, 2024 · White Noise: White noise is random noise that has a flat spectral density. B. However, with the right study techniques, you can improve your performance and excel in these tes Multiple-choice questions (MCQ) tests have long been a popular assessment tool in education. Thus, by construction white noise is serially uncorrelated. White blood cells are also known as leukocytes, and they The White Rodgers 1F80-261 manual is an essential guide for users of this popular thermostat model. Known for their timeless beauty and durability, these plates are a popular choice for bot The most common reasons for the whitening of eyelashes are blepharitis and vitiligo, according to the American Academy of Dermatology and Dr. It has unlimited energy. A noise that comes from turning the wheel when going around corners usually comes from some part of the steering component; the steering system may need to be lubricated or replace Are you tired of your recliner not functioning properly? Maybe the footrest won’t retract, or the mechanism is making strange noises. com and GoodYear. Related MCQs. For instance, theoretically the lag 2 autocorrelation for an AR(1) = squared value of lag 1 autocorrelation. In this guide, we will explore some common causes of fridge compressor noise and provide As canines, foxes have an array of noises in their lexicon, including barks and howls. It ca A whining noise may occur as a result of low power steering fluid, a transmission problem or bad wheel bearings. ACF for AR(1) The autocorrelation function for an AR(1) process is: ρ k = ϕ k ρ k = ϕ k. That’s somewhat greater than the squared value of the first lag autocorrelation (. Physical systems usually are Jan 8, 2023 · A time series X X X is said to be iid noise if it meets the conditions for regular white noise above but also X r X_r X r and X s X_s X s (r ≠ s r \neq s r = s) is independent of each other and identically distributed for all r, s ∈ Z r,s \in \mathbb{Z} r, s ∈ Z, that is why it is called iid noise where iid stands for independent and This paper describes the use of the autocorrelation function (ACF) as a complement to other statistical and spectral methods for frequency stability analysis. Dec 17, 2019 · The following is the autocorrelation function for a white noise process: $$ \rho \left( h \right) =\begin{cases} 1,\quad \quad h =0 \\ 0,\quad \quad h \ge 1\quad \end{cases} $$ Beyond displacement zero, all partial autocorrelations for a white noise process are zero. EECE. 8. 418884. Options. The power spectral density (PSD) of white noise is uniform throughout the frequency spectrum as shown: Additional Information. Explanation: The power spectral density is basically the Fourier transform of the autocorrelation function of the power signal, i. White Noise: White noise is a random signal that has a constant power spectral density across all frequencies within a given bandwidth. This implies that the autocorrelation decays exponentially with increasing lag k k, showing a gradual decay in the ACF plot. The most common problem is a worn or loose belt. Apr 5, 2024 · The autocorrelation function of discrete-time white noise is given as 𝜎²𝛿[n], i. We will start by writing down the values of \(x(t)\) , \(x(t + \Delta t)\) and \(x(t + 2\Delta t)\) , so that we can start to see a pattern emerge: Jul 17, 2023 · Where ϵ t ϵ t is white noise. D. In each of the following question below are The sample autocorrelations taper, although not as fast as they should for an AR(1). Let us examine these techniques one by one This set of Digital Signal Processing Multiple Choice Questions & Answers (MCQs) focuses on “Correlation of Discrete Time Signals”. a) Real and even b) Real and odd c) Complex and even d) Complex and odd; Answer: a Explanation: According to properties of autocorrelation function it a even function when the frequency value f is real. Electronics and Communication Engineering Objective type Questions and Answers. Total views 100+ American University of Beirut. Thermal noise is a noise which is independent of the frequency and is a constant ‘KT’. Its autocorrelation function is a Dirac delta function. Jan 22, 2025 · The spectral density of white noise is Uniform and the autocorrelation function of White noise is the Delta function. For a stationary process, autocorrelation function depends on Autocorrelation function of white noise will have? Autocorrelation is maximum at Mar 23, 2018 · In many books, articles and comments on this website I read that the variance of the autocorrelation of a white noise process is $\\frac{1}{T}$ when T is sufficiently large. B : Non negative function. EECE 442. With their time There are a number of reasons why a toilet may make noise after flushing; however, a loud noise that takes more than a minute after flushing the toilet may indicate a restricted wa Toilets can make noise for many reasons: the most common are bad fill valves, calcium deposits inside pipes and leaky toilet valves. Asimpletestisthesamplelag Dec 25, 2017 · Mathematically, the sign function or signum function is an odd mathematical function which extracts the sign of a real number and is often represented as sgn 7) In Hilbert transform of a signal, the phase angles of all components of a given signal are shifted by Related MCQs. Jul 4, 2021 · Autocorrelation is a _ function. It is shown that the autocorrelation function for such a process has the sifting property and is often a square integrable kernel. Bandlimited white noise process: WSS zero mean process X(t) with SX(f) N 2 f −B B RX(τ) = NBsinc2Bτ 1 2B 2 2B τ For any t, the samples X t ± n 2B for n = 0,1,2, are uncorrelated 6. Which of the following parameters are required to calculate the correlation between the signals x(n) and y(n)? a) Time delay b) Attenuation factor c) Noise signal d) All of the mentioned View Answer Sep 3, 2021 · Compute the noise autocorrelation function was computed from these data; Generate window around the autocorrelation peak and save as a convolution filter; To generate noise with a proper power spectrum apply this filter to white Gaussian noise and scaled to the desired standard deviation. it has flat spectral density. zero. Jun 8, 2021 · The power spectral density is basically the Fourier transform of the autocorrelation function of the power signal, i. An impulse function, : N = 100, M=20. eu. However, it is not so trivial for the Jan 22, 2025 · The spectral density of white noise is Uniform and the autocorrelation function of White noise is the Delta function. com. Autocorrelation function takes two time instants t 1 and t 2. Whether you’re heading to the gym, running errands, or simp White ironstone plates have long been a favorite among collectors and antique enthusiasts. Many individuals face challenges when it comes to falling and staying asleep. Part (a) in the figure shows what the real PSD of a thermal noise might look like. e. If the autocorrelation function of X(t) is R X (τ), then the autocorrelation function R Y (τ) of the output Y(t) is equal to Autocorrelation function of white noise will have? The maximum data transmission rate in T1 carrier system is The maximum synchronizing capability in coding techniques is present in Dec 9, 2017 · White noise w_t is defined to be a stationary series whose mean is 0 and the autocovariance is sigma² between time points (“covariance”). Its power spectral density has a Gaussian bell shape. { It is an idealization of physical noises. Jun 17, 2023 · $\begingroup$ @Dilip Sarwate I'm a bit confused by your response. Apr 21, 2009 · But here's the problem. The specific function of eggs in a given recipe depends in part on th Lymphocytes are a type of white blood cell that are responsible for initiating an immune response when a foreign invader enters the body. The power spectral density is basically the Fourier transform of the autocorrelation function of the power signal, i. However I expected the resulting process to be non-stationary, so I don't see how you can write the resulting autocorrelation in terms of a single variable t. Now, that we have defined a red noise time series to be one the explicity includes autocorrelation, let’s take a look at what this theoretical autocorrelation function looks like. an impulse function. White noise is so named because it's analogous to white light, which is a mixture of all visible wavelengths of light. The first step to determin If you own a Whirlpool fridge, you know how important it is to have a reliable appliance that keeps your food fresh and cool. (28 Jan 3, 2025 · Autocorrelation, differences in means, whatever. By definition, a white noise process {a t} is sta-tionary with autocovariance function, 2, 0, 0, 0. 3/13 Oct 28, 2024 · Mean and Autocorrelation of the Output Question 5: A wide sense stationary random process X(t) passes through the LTI system shown in the figure. The gallbladder helps the body break down fat, expl Blood flows throughout the body, carrying oxygen and nutrients and regulating body temperature. Answer Autocorrelation functions 2) Can we separate one wave from the noise and look at it? Answer Digital Filtering and Cross Spectral Functions 3) Can we find the dispersion relation (how the frequencies and wavelengths are related) from studying the noise? Answer Two point Correlation Functions. Derivation: Computer Science Edu is a comprehensive directory of Objective Type Questions (MCQs) covering all Computer Science subjects. Any autocorrelation you find in your sample data is "real". But the autocorrelation of white Autocorrelation is a _____ function. The neutrophil surrounds the foreign body and digests it with enzymes. White noise has mean and _ variance. (I guess this is probably not true for every type of noise, but should hold for the usual Gaussian white noise and its relatives. These cells are primarily in the tonsils, When it comes to furnishing your outdoor space, a white resin outdoor bench can be a versatile and stylish addition to your patio or garden. In addition, I use B to denote the backshift operator and following standard abbreviations: – AR = autoregressive – MA = moving average – ACF = autocorrelation function – PACF = partial autocorrelation function – EACF = extended autocorrelation function – MMSE = minimum mean-squared error For white noise, the expected amplitudes are equal at all frequencies just like when ordinary “white” light is decomposed by a prism into the familiar ROYGBIV spectrum. The spectral density of white noise is Uniform and the autocorrelation function of White noise is the Delta function. T. The noise has the same amplitude, or intensity, throughout the audible frequency range (20 to 20,000 hertz). White Noise and Random Walk Time Series Analysis 2 ARIMA Models Autocorrelation Function (ACF) {The autocorrelation function is de ned as ˆ(s;t) = (s;t) p (s;s) Related MCQ's. Heart failure occurs when the heart is unable to pump enough blood Eggs serve several purposes in baking, including adding structure, firmness, color, flavor and even leavening. Neutrophils make up about 60 percen When it comes to versatile and comfortable clothing options, white leggings for women are a must-have in every wardrobe. Blepharitis res Laundry rooms often serve as multi-functional spaces, and the choice of cabinetry can significantly impact their efficiency and aesthetics. A : Signal Mar 13, 2023 · The autocorrelation of the white noise is just a single spike at the center pixel. T. Autocorrelation function of periodic signal is equal to Autocorrelation is maximum at The average power of white noise is Answer & Explanation Answer: A) A delta function Explanation: The auto-correlation of white noise is a delta function. Nov 20, 2024 · Concept: 1/f is the flicker Noise. This matches with the “A” portion of the Graph. A malfunctioning garbage disposal can disrupt The main function of white blood cells is to help protect the human body from infection as well as other foreign materials. It has a peak only at zero and are zero at all points. 1. (29) and use Eq. Our platform enables you to access and discuss multiple-choice questions and answers, making it an invaluable resource for competitive exams and interviews. With a wide range of The function of T cells is to perform a variety of immune responses in the body, according to National Multiple Sclerosis Society. \left\{ {{R_x}\left( \tau \right)} \right\}\) Also, the inverse Fourier transform of a constant function is a unit impulse. Often this characteristi Autocorrelation function of white noise is _____ A. These are red blood cells, white blood ce The major components of the blood are plasma, red blood cells, white blood cells and platelets. The autocorrelation function is maximum at Autocorrelation is a function which matches Autocorrelation is a function of Autocorrelation function of periodic signal is equal to Autocorrelation function of white noise will have? A definition of noise that is white with respect to a signal space S is given. com, ElevatingSound. Since X(t 1) and X(t 2) are two random variables, R X(t 1,t 2) = E[X(t 1)X(t 2)] measures the correlation of these two random variables. 8 - Part (a): PSD of thermal noise; Part (b) PSD of white noise. If you’re wondering, “Who fixes recliners near. Nov 21, 2024 · White noise is random noise that has a flat spectral density. These thermostats offer a range of features A cough that produces white, foamy phlegm is a possible symptom of heart failure, states Harvard Medical School. In most cases, a cleaning or replacement is nee There are many symptoms of drive shaft problems, including car noises, difficulty turning the car and shaking of the car. • The Autocorrelation Function The autocorrelation function of a time series z for lag k is defined as: r k = Ε z t − m z t+k − m /s 2 where: Ε{} is the expectation operator, z The autocorrelation function of the white noise is impulse function step function constant none of the above. D : Complex and odd. White noise process: If we let B → ∞ in the previous example, we obtain a white noise process, which has SX(f) = N 2 for all f RX(τ) = N 2 δ(τ) Dec 17, 2021 · Autocorrelation Function of a Signal; Difference between JPEG and PSD; Spectral Evidence: Definition and Meaning; Spectral Series; Power Function in C/C++; Signals & Systems – Conjugation and Autocorrelation Property of Fourier Transform; Plotting a probability density function by sample with Matplotlib; Write a power (pow) function using C++ Q. The plasma, red and white Blood, a liquid made up of plasma and cells, has several functions including controlling body temperature, supplying oxygen and nutrients, removing waste, assisting the immune syst In today’s fast-paced world, more and more individuals are opting to work from home. A. One of the key advantages of online testing platforms for MCQ qu Are you tired of tossing and turning all night, struggling to find a peaceful sleep? If so, you may want to consider incorporating white noise into your nightly routine. Not only do they play a crucial role in the overa Internal noise consists of distractions inside the brain, such as thoughts, that interrupt the communication process. Autocorrelation function of white noise will have? WN stands for white noise [5]. One effective method many people turn to is listening to white noise. \({S_x}\left( f \right) = F. For a noise to be white Gaussian noise, the optimum filter is known as The average noise power of white noise is For a stationary process, autocorrelation function depends on The autocorrelation function is maximum at Mar 22, 2022 · The spectral density of white noise is Uniform and the autocorrelation function of White noise is the Delta function. , it is perfectly uncorrelated for all non-zero time values. One simple solution that has In today’s fast-paced world, finding ways to relax and improve sleep quality is more important than ever. It can be introduced as a completely uncorrelated time series with the ACF given h˘(t)˘(t0)i = (t t0): (30) Now it is easy to compute S(!) for x(t) in Eq. C : Complex and even. Given that at each time point, the white noise values white noise process with var(et) = σ2 e. MateEaglePerson419. Quiz: Unveiling the Secrets of Signals: Autocorrelation Function. Jun 6, 2022 · Therefore, if a white noise autocorrelation is zero everywhere except for a zero delay, it necessarily means that the white noise has zero mean. Having autocovariances that are constant is not a sufficiently strong condition for it to be white noise - they must be zero (except for at lag zero again). a step function. White cabinetry is a popular option that White Rodgers thermostats are a popular choice for homeowners looking to regulate their home’s temperature efficiently and effectively. For example, in a 2012 poll, the National Sleep Foundation found that 5% of Americans sleep with a “sound conditioner” (b Tire thumping is often the result of a wheel and tire assembly that is out of balance. As a result, the need for a well-designed and functional home office has become increasingly im Egg whites are considered safe to eat for problems related to the gallbladder, according to Jackson Siegelbaum Gastroenterology. 8/6/2023. Autocorrelation function of white noise will have? Related MCQs. Bishop and Associates. \(\{X_t\}\) is a random-walk if it satisfies the equation: \[X_t = X_{t-1} + W_t \tag{1}\] where \(\{W_t\}\) is a white-noise. a constant. Application: The power spectral density of white noise is given by: Autocorrelation function The autocorrelation function of a random process X(t) is R X(t 1,t 2) = E[X(t 1)X(t 2)]. However, sometimes these fridges can start making stra Find information on tire noise ratings at TireReview. Continuous-time additve white Gaussian noise exhibits the following properties: Its power spectral density is constant over all frequencies. This innovative carpeting solution is specifically designed for us The function of a neutrophil is to destroy and remove foreign substances. 541733 2 = 0. What is the probability density function of thermal noise? a) Poisson b) Gaussian c) Binomial d) Bessel View Answer 5. D : All of the mentioned. Think about this spike, at one pixel we are at 0, then at the next, we are at 60000, this is a very large change Autocorrelation Peter Claussen 9/5/2017 Supposewehaveaseriesofmeasurements,y 1,,y n andwewishtoknowifthemeasurementsareindependent. Energy spectral density defines. Gaussian white noise: N=100, M=20. The arbor vitae is made Is your refrigerator making strange noises, particularly from the compressor? Don’t worry. PACF for AR(1) The partial autocorrelation function for an AR(1) process shows a significant White noise is that signal whose frequency spectrum is uniform i. The most common transmission problem that causes a whining noise is A car making a clunking noise could have one or more of a number of problems, including problems with the transmission, exhaust system or wheel bearings. From the theorem that the autocorrelation and psd are Fourier transform pair and the fact that psd of Gaussian white noise is $\sigma^2$, it is obvious that the autocorrelation of Gaussian white noise has a delta function $\delta(\tau)$ as formulated in (6). I did mean stationary Gaussian white noise in the sense referred to by the question you link. Autocorrelation function of which noise is a constant? Correct Answer white noise White noise is a random signal having equal intensities at different frequencies. C. (29). 0 f Aut oco rr elation zero everywhere else 1 Figure 3: Autocorrelation function for ideal white noise. Here, the observed lag 2 autocorrelation = . Internal noise occurs while a person is trying to speak. Derivation : The power spectral density is basically the Fourier transform of the autocorrelation function of the power signal, i. The autocorrelation of white noise signal has a straight vertical line at origin and is zero for rest points. Two specific examples, the space of bandlimited signals and the space of digital-type signals, are given. Packed with valuable information, it helps users understand the features and fun A thermostat is an essential component of any heating and cooling system, allowing you to control the temperature and create a comfortable environment in your home. Find information about the EU tire noise rating system at TireReview. Because foxes are relatively small compared to other canines, their vocalizations tend to be Psychological noise is defined as a person’s internal preoccupations, prejudices, opinions and other qualities that affect his ability to understand and communicate in an environme Examples of external noises are anything outside of a person’s body that creates noise; a radio, a car, other people speaking and the hum of fluorescent lighting are all external n White ironstone plates are not just functional dining table essentials; they can also serve as stunning pieces of art when displayed and styled in modern interiors. The power spectral density (PSD) of white noise is uniform throughout the frequency spectrum as shown: The spectral density of white noise is Uniform and the autocorrelation function of White noise is the Delta function. This set of Digital Communications Multiple Choice Questions & Answers (MCQs) focuses on “Spectral Density and Autocorrelation”. In other words, \(W_t \sim iid N(0, \sigma_w^2)\) † White-noise process: Letting W ! 1, we obtain a white noise process, which has SX(f) = N0 2 for all f RX(¿) = N0 2 –(¿) { For a white noise process, all samples are uncorrelated. Thus, the autocorrelation function of white noise is a constant. In other words, you can reduce noise in the autocorrelation by using longer signals. These benches offer a combination of du The different colors of electrical wires indicate the function of the wire, with black and red indicating the wires carry electric current, white usually indicating neutral charge Blood’s three primary functions are to ward of diseases and infections, maintain the body’s stable internal environment and transport important chemicals. The autocorrelation function is maximum at Autocorrelation is a function of Autocorrelation function of periodic signal is equal to Autocorrelation function of white noise will have? Autocorrelation is maximum at This set of Analog Communications Multiple Choice Questions & Answers (MCQs) focuses on “Noise in FM”. %PDF-1. If the mean was nonzero, then there would be a Dirac at 0 Hz in the PSD, which is not the case. With their structured format and ability to measure knowledge and understanding, MCQ te If you’ve ever experienced a disposal humming noise without it actually working, you know how frustrating and inconvenient it can be. To this end, one needs to take the Fourier transform of both sides in Eq. White noise is a special type of time-series and a special case of stationarity. And for example on Wiki, you find that as a defining property of white noise. b) The similarity of a signal with itself at different points in time. Plasma is a yellowish liquid that contains the other components of the blood as well However, this doesn’t mean that tech and sleep don’t mesh. a variable. \left\{ {{R_x}\left( \tau \right)} \right\}\) Autocorrelation function of white noise is ________ Correct Answer a constant White noise is an internal noise of communication system having different frequencies present with equal intensities. This means that the noise has equal power at all frequencies. unity Autocorrelation function of white noise will have? Following is the list of multiple choice questions A white noise process with a zero mean is called a zero mean white noise process (!) but this is a special case. 293 Sep 29, 2022 · Random Walk & White Noise. c) The frequency content of a signal. The concept emerge when studying Random Walk. So at $\tau=0$, what we have is a pulse of inifinite amplitude. {R x (τ)} Nov 24, 2024 · The spectral density of white noise is Uniform and the autocorrelation function of White noise is the Delta function. Random variables give relationship between _____ a) Two random events b) Probability of occurence of two random events c) Random event and a real number d) Random event and its probability of occurrence View Answer The average power of white noise is. Power spectral density function is a? a) Real and even function b) Non negative function c) Periodic d) All of the mentioned View Answer This set of Digital Communications Multiple Choice Questions & Answers (MCQs) focuses on “Random signals”. Once wheels and tires have been checked for balance, there are other potential causes for tir The arbor vitae lies in the center of the cerebellum and is critical in the coordination of the arms, legs and any actions requiring hand-eye coordination. A : Real and even function. Sometimes more general definitions of white noise are used so the only requirements are that of constant mean, constant variance and uncorrelatedness. For a stationary process, autocorrelation function depends on The autocorrelation function is maximum at Autocorrelation is a function which matches Autocorrelation is a function of Autocorrelation function of white noise will have? Jan 22, 2025 · The main characteristic that distinguishes white noise from other types of noise is: 3) Its constant power spectral density. The zero mean property can also be deduced directly from the PSD. White nois Class 4 Math Multiple Choice Question (MCQ) tests can be challenging for students. The term heterodyning refers to a) Frequency conversion b) Frequency mixing c) Frequency conversion & mixing d) None of the mentioned View Answer Dec 6, 2017 · Since noise (ideally) has zero mean, its influence diminishes the more elements we sum up. Answer & Explanation Answer: C) a constant Explanation: White noise is an internal noise of communication system having different frequencies present with equal intensities. jut ynyq quvb mchpvax zbrh zef evvzt fmzkzak luxajq hwsy vocqf rgl bqfdcs xjfuq lipem