Q.1
Sampling rate conversion by the rational factor I/D is accomplished by what connection of interpolator and decimator?
  • a) Parallel
  • b) Cascade
  • c) Convolution
  • d) None of the mentioned
Q.2
Which of the following has to be performed in sampling rate conversion by rational factor?
  • a) Interpolation
  • b) Decimation
  • c) Either interpolation or decimation
  • d) None of the mentioned
Q.3
Which of the following operation is performed by the blocks given the figure below?
Questiondigital-signal-processing-questions-answers3.jpg
  • a) Sampling rate conversion by a factor I
  • b) Sampling rate conversion by a factor D
  • c) Sampling rate conversion by a factor D/I
  • d) Sampling rate conversion by a factor I/D
Q.4
The Nth root of unity WN is given as _____________
  • a) ej2πN
  • b) e-j2πN
  • c) e-j2π/N
  • d) ej2π/N
Q.5
Which of the following is true regarding the number of computations requires to compute an N-point DFT?
  • a) N2 complex multiplications and N(N-1) complex additions
  • b) N2 complex additions and N(N-1) complex multiplications
  • c) N2 complex multiplications and N(N+1) complex additions
  • d) N2 complex additions and N(N+1) complex multiplications
Q.6
What is the DFT of the four point sequence x(n)={0,1,2,3}?
  • a) {6,-2+2j-2,-2-2j}
  • b) {6,-2-2j,2,-2+2j}
  • c) {6,-2+2j,-2,-2-2j}
  • d) {6,-2-2j,-2,-2+2j}
Q.7
If X(k) is the N point DFT of a sequence whose Fourier series coefficients is given by ck, then which of the following is true?
  • a) X(k)=Nck
  • b) X(k)=ck/N
  • c) X(k)=N/ck
  • d) None of the mentioned
Q.8
What is the DFT of the four point sequence x(n)={0,1,2,3}?
  • a) {6,-2+2j-2,-2-2j}
  • b) {6,-2-2j,2,-2+2j}
  • c) {6,-2-2j,-2,-2+2j}
  • d) {6,-2+2j,-2,-2-2j}
Q.9
If W4100=Wxthen what is the value of x?
  • a) 2
  • b) 4
  • c) 8
  • d) 16
0 h : 0 m : 1 s