1) In polyphase filter, which kind of realization is/are adopted for three subfilters possessing coefficients?
a. Cascade
b. Parallel
c. Direct
d. All of the above
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Answer
Explanation
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ANSWER: Parallel
Explanation:
No explanation is available for this question!
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2) How is the sampling rate conversion achieved by factor I/D?
a. By increase in the sampling rate with (I)
b. By filtering the sequence to remove unwanted images of spectra of original signal
c. By decimation of filtered signal with factor D
d. All of the above
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Answer
Explanation
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ANSWER: All of the above
Explanation:
No explanation is available for this question!
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3) How is the operating level of sampling rate for the subfilters involved in the polyphase filters?
a. Low
b. Moderate
c. High
d. None of the above
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Answer
Explanation
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ANSWER: Low
Explanation:
No explanation is available for this question!
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4) In polyphase filters, the subfilters which share a common delay line results in the reduction of the storage requirement by factor ______
a. 1
b. 2
c. 3
d. 4
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Answer
Explanation
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ANSWER: 3
Explanation:
No explanation is available for this question!
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5) For designing a multirate LPF with passband 0 to 50 Hz, stopband 60 to 280 Hz, stopband deviation 0.001, passband deviation 0.01 and sampling frequency (fs) = 400 Hz, what would be the value of normalized transition width?
a. 0.025 Hz
b. 1.25 Hz
c. 1.50 Hz
d. 2.6 Hz
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Answer
Explanation
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ANSWER: 0.025 Hz
Explanation:
No explanation is available for this question!
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6) Consider the assertions (steps) given below. Which among the following is a correct sequence of designing steps for the sampling rate converters?
A. Computation of decimation/interpolation factor for each stage.
B. Clarification of anti-aliasing / anti-imaging filter requirements.
C. Designing of filter at each stage.
D. Calculation of optimum stages of decimation/ interpolation yielding maximum efficient implementation.
a. A, B, C, D
b. C, A, D, B
c. D, A, B, C
d. B, D, A, C
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Answer
Explanation
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ANSWER: B, D, A, C
Explanation:
No explanation is available for this question!
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7) To change the sampling rate for better efficiency in two or multiple stages, The decimation and interpolation factors must be _________unity.
a. Less than
b. Equal to
c. Greater than
d. None of the above
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Answer
Explanation
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ANSWER: Greater than
Explanation:
No explanation is available for this question!
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8) In direct form realization for an interpolator, which among the following generates an intermediate signal?
a. Upsampler
b. Downsampler
c. Anti-imaging filter
d. Anti-aliasing filter
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Answer
Explanation
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ANSWER: Upsampler
Explanation:
No explanation is available for this question!
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9) Anti-imaging filter with cut-off frequency ωc = π/ I is specifically used _______ upsampling process for the removal of unwanted images.
a. Before
b. At the time of
c. After
d. All of the above
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Answer
Explanation
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ANSWER: After
Explanation:
No explanation is available for this question!
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10) Decimation is a process in which the sampling rate is __________.
a. enhanced
b. stable
c. reduced
d. unpredictable
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Answer
Explanation
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ANSWER: reduced
Explanation:
No explanation is available for this question!
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