Q181
Open questionA system with input x[n] and output y[n] is given as
The system is
The system is
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ECE · all questionsSignal Processing
Signal Processing
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Q182
Open questionThe Fourier transform of a voltage signal x(t) is X(f). The unit of |X(f)| is
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Q183
Open questionAn excitation is applied to a system at t = land its response is zero for -∞ < t < T. Such a system is a
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Q184
Open questionA realization of a stable discrete time system is shown in figure. If the system is excited by a unit step sequence input x[n], the response y[n] is
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Q185
Open questionMatch the following and choose the correct combination.
| Group I | Group II |
| E. Continuous and aperiodic signal | 1. Fourier representation is continuous and aperiodic. |
| F. Continuous and periodic signal | 2. Fourier representation is discrete and aperiodic. |
| G. Discrete and aperiodic signal | 3. Fourier representation is continuous and periodic. |
| H. Discrete and periodic signal | 4. Fourier representation is discrete and periodic. |
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Q186
Open questionIf L[f(t)] = F(s), then L[f(t - T)] is equal to
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Q187
Open questionThe impulse response h(t) of a linear time-invariant continuous time system is described by h(t) = exp(αt)u(t) + exp(βt)u(-t), where u(t) denotes the unit step function, and α and β are real constants. This system is stable if
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Q188
Open questionGiven that
L[h(t)] is
L[h(t)] is
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Q189
Open questionAn FIR system is described by the system function
The system is
The system is
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Q190
Open questionFor a signal x(t) the Fourier transform is X(f). Then the inverse Fourier transform of X(3f + 2) is given by
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Q191
Open questionThe region of convergence of the z-transform of a unit step function is
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Q192
Open questionThe region of convergence of the z-transform of a unit step function is
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Q193
Open questionPoles of Butterworth and Chebyshev low pass filters are located on . . . . . . . . and . . . . . . . . respectively in s-plane.
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Q194
Open questionLet function A = sinω0t and B = sin(ω0t + φ). The power of two signals; PA and PB is related as
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Q195
Open questionMatch List-I with List-II and select the correct answer using the options given below:
| List-I (Time Function) | List-II (Fourier Spectrum/Fourier Transform) |
| a. Periodic Function | 1. Continuous spectrum at all frequencies |
| b. Aperiodic Function | 2. -jπ{δ(ω - ω0) - δ(ω + ω0)} |
| c. Unit Impulse δ(t) | 3. Line discrete spectrum |
| d. sin ω(t) | 4. 1 |
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Q196
Open questionWhich of the following is introduced in the frequency sampling realization of the FIR filter?
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Q197
Open questionThe convolution of f(t) with itself is given to be Then what is f(t)?
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Q198
Open questionIf x[n] = -x[-n], then
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Q199
Open questionA signal x(t) is band-limited to 2Hz, and y(t) = x3(t) + x(t) + 1. The Nyquist sampling frequency of y(t) is:
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Q200
Open questionThe output of a system with impulse response δ[n - 2] to an input signal, u[n + 2] is:
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