Factor I Interpolation MCQ’s

Digital Signal Processing Electronics & Communication Engineering

This set of Digital Signal Processing Multiple Choice Questions & Answers (MCQs) focuses on “Factor I Interpolation”.

1. Which of the following is true about the interpolated signal whose spectrum is V(ωy)?
a) (I-1)-fold non-periodic
b) (I-1)-fold periodic repetition
c) I-fold non periodic
d) I-fold periodic repetition

2. What is the relationship between ωx and ωy?
a) ωy= ωx.I
b) ωy= ωx/I
c) ωy= ωx+I
d) None of the mentioned

3. The following sampling rate conversion technique is interpolation by a factor I.

a) True
b) False

4. If X(z) is the z-transform of x(n), then what is the z-transform of interpolated signal v(m)?
a) X(zI)
b) X(z+I)
c) X(z/I)
d) X(zI)

5. If v(m) denote a sequence with a rate Fy=I.Fx which is obtained from x(n), then which of the following is the correct definition for v(m)?
a)

x(mI), m=0,±I,±2I....
0, otherwise

b)

x(mI), m=0,±I,±2I....
x(m/I), otherwise

c)

x(m/I), m=0,±I,±2I....
0, otherwise

d) None of the mentioned

6. If x(m) and v(m) are the original and interpolated signals and ωy denotes the frequency variable relative to the new sampling rate, then V(ωy)= X(ωyI).
a) True
b) False

7. Which of the following operation has to be performed to increase the sampling rate by an integer factor I?
a) Interpolating I+1 new samples
b) Interpolating I-1 new samples
c) Extrapolating I+1 new samples
d) Extrapolating I-1 new samples

8. C=I is the desired normalization factor.
a) True
b) False

9. The following sampling rate conversion technique is interpolation by a factor I.

a) True
b) False

10. In one of the interpolation process, we can preserve the spectral shape of the signal sequence x(n).
a) True
b) False

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