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Signal Processing
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Q441

Consider a four point moving average filter defined by the equation

y [n] = \sum_{i = 0}^{3} α_{i} x [n - i] .

The condition on the filter coefficients that results in a null at zero frequency is

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Q442

Which one of the following is correct?
Energy of a power signal is

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Q443

Consider this variant of the Fibonacci system:
y[n] = y[n - 1] - y[n - 2] + x[n], where x[n] represents the input and y[n] represents the output. The poles of the given system will be:

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Q444

For a random signal (continuous time) x(t) defined for t ≥ 0, its probability density function (pdf) at t = t₀ is such that

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Q445

If the unit step response of the network is (1 - e^-at), then its impulse response is:

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Q446

The range of values of a and b for which the linear time invariant system with impulse response h(n) = aⁿ, n ≥ 0; bⁿ, n < 0 will be stable is

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Q447

Given h[n] = {1, 2, 3, 2, 1}. It is a linear phase FIR filter because

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Q448

In a trigonometric Fourier series representation of a signal; a^o (or A^o) is:

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Q449

If a sequence is circularly shifted in time by 8 units, the magnitude response will

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Q450

A function of one or more variables which conveys information on the nature of physical phenomenon is called

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Q451

According to Shanon's theorem, the output from any source of rate R can be coded and transmitted over channel capacity C with the condition that

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Q452

A discrete time signal is given as

x [n] = cos \frac{π n}{9} + sin [- \frac{π n}{7} + \frac{1}{2}] .

The period N for the periodic signal is

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Q453

A stable and casual digital infinite impulse response filter has its pole location at

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Q454

Which of the following is/are not a property/properties of a power spectral density function S_x(ω)?

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Q455

Which one of the following is a periodic signal?

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Q456

A network consisting of a finite number of linear resistor (R), inductor (L), and capacitor (C) elements, connected all in series or all in parallel,

k = 1 \sum 3 a_{k} cos (k ω_{0} t),

where a_k ≠ 0, ω₀ ≠ 0. The source has nonzero impedance. Which one of the following is a possible form of the output measured across a resistor in the network?

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Q457

The direct form structure of an FIR (finite impulse response) filter is shown in the figure.
The filter can be used to approximate a
Signal Processing mcq question image

Signal Processing mcq question image

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Q458

Let x(t) be the input to linear, time invariant system the required output is 4x(t - 2). The transfer function of the system should be

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Q459

If a discrete time signal x[n] is filtered by a ideal low pass filter with cut-off frequency . . . . . . . . then the output of the filter can be sampled by a factor of 'M' (is and integer) without aliasing.

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Q460

x(t) is a periodic signal with even symmetry. Then, its trigonometric fourier series expansion will have

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