Q221
Open questionWhat will be the Laplace transform for f(t) = e-btu(t)?
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Signal Processing
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Q222
Open questionThe even and odd components of the signal x(t) = e-2t cos t are respectively,
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Q223
Open questionA band-limited lowpass signal is sampled at twice its Nyquist rate with fs = 2000 sps. The signal is band-limited to
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Q224
Open questionFor a given transmitted pulse p(t), 0 ≤ t ≤ T, the impulse response of a filter matched to the received signal is
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Q225
Open questionIf then x(z) is equal to
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Q226
Open questionConsider a single input single output discrete-time system with x[n] as input and y[n] as output, where the two are related as
y\left[ n \right] = \left\{ {\begin{array}{*{20}{c}} {n\left| {x\left[ n \right]} \right|,}&{{\text{for }}0 \leqslant n \leqslant 10} \\ {x\left[ n \right] - x\left[ {n - 1} \right],}&{{\text{otherwise}}} \end{array}} \right.
Which one of the following statements is true about the system?
y\left[ n \right] = \left\{ {\begin{array}{*{20}{c}} {n\left| {x\left[ n \right]} \right|,}&{{\text{for }}0 \leqslant n \leqslant 10} \\ {x\left[ n \right] - x\left[ {n - 1} \right],}&{{\text{otherwise}}} \end{array}} \right.
Which one of the following statements is true about the system?
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Q227
Open questionThe covariance function, Cx(τ), of a stationary stochastic process, x(t), is said to be positive definite. This means that
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Q228
Open questionA composed signal is given by x(t) = cos(ωt) + sin(ωt) + sin2(ωt) + cos(ωt) + sin2(ωt). The odd component is
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Q229
Open questionThe signal x(n) shown in the above figure is a
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Q230
Open questionWhich of the following is NOT one of the representations of discrete-time signals?
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Q231
Open questionThe first stage DIT-FFT of a sequence x(n) is given by:
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Q232
Open questionWhat is the value of magnitude frequency response of Butterworth low pass filter at Ω = 0 ?
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Q233
Open questionThe input-output relationship of a causal stable LTI system is given as y[n] = αy[n - 1] + βx[n]
If the impulse response h[n] of this system satisfies the condition the relationship between α and β is
If the impulse response h[n] of this system satisfies the condition the relationship between α and β is
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Q234
Open questionThe linear time invariant system h(t) = (e-4t + e4t).u(t) is . . . . . . . . and . . . . . . . .
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Q235
Open questionThe unit sample response of a discrete system is 1, 0, 0, 0 . . . For an input sequence 1, 0, 1, 0, 0, 0 . . ., what is the output sequence?
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Q236
Open questionThe output w[n] of the system shown in figure is
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Q237
Open questionA matched filter having a frequency response matches to:
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Q238
Open questionAuto-correlation function Rx(τ) of a stationary process X(t) is
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Q239
Open questionWhat is the ROC for the given signal?
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Q240
Open questionIf the step response of a causal, linear time-invariant system is a(t), then the response of the system to a general input x(t) would be
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