Category: Digital Signal Processing

This set of Digital Signal Processing Multiple Choice Questions & Answers (MCQs) focuses on “Sampling Rate Conversion”. 1. The Nth root of unity WN is given as _____________a) ej2πNb) e-j2πNc) e-j2π/Nd) ej2π/N 2. Which of the following is true?a) W∗N=1NWN−1b) WN−1=1NWN∗c) WN−1=WN∗d) None of the mentioned 3. 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) […]

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-periodicb) (I-1)-fold periodic repetitionc) I-fold non periodicd) I-fold periodic repetition 2. What is the relationship between ωx and ωy?a) ωy= ωx.Ib) ωy= ωx/Ic) […]

This set of Digital Signal Processing Multiple Choice Questions & Answers (MCQs) focuses on “Frequency Transformations”. 1. Which of the following is the backward design equation for a low pass-to-low pass transformation?a) \(\Omega_S=\frac{\Omega_S}{\Omega_u}\)b) \(\Omega_S=\frac{\Omega_u}{\Omega’_S}\)c) \(\Omega’_S=\frac{\Omega_S}{\Omega_u}\)d) \(\Omega_S=\frac{\Omega’_S}{\Omega_u}\) 2. If A=\(\frac{Ω_1 (Ω_u-Ω_l)}{-Ω_1^2+Ω_u Ω_l}\) and B=\(\frac{Ω_2 (Ω_u-Ω_l)}{Ω_2^2-Ω_u Ω_l}\), then which of the following is the backward design equation […]

This set of Digital Signal Processing Multiple Choice Questions & Answers (MCQs) focuses on “Analog Filters Classification”. 1. What is the stop band gain of a low pass filter with δS as the pass band attenuation?a) -20log(1- δS)b) -20log(δS)c) 20log(δS)d) 20log(1- δS) 2. What is the region after the stop band frequency in the magnitude frequency […]

This set of Digital Signal Processing Multiple Choice Questions & Answers (MCQs) focuses on “IIR Frequency Domain Filter Analysis”. 1. If the error in delay is defined as Tg(ωk) – Tg(ω0) – Td(ωkk), then what is Tg(ω0)?a) Filter delay at nominal frequency in stop bandb) Filter delay at nominal frequency in transition bandc) Filter delay […]

This set of Digital Signal Processing Multiple Choice Questions & Answers (MCQs) focuses on “FIR Least Squares Filters”. 1. What should be the desired response for an optimum wiener filter to be an approximate inverse filter?a) u(n)b) δ(n)c) u(-n)d) none of the mentioned 2. What should be the length of the truncated filter?a) Mb) M-1c) […]

This set of Digital Signal Processing Multiple Choice Questions & Answers (MCQs) focuses on “Least Squares Design Methods”. 1. By integrating the error equation with respect to the parameters {ak}, we obtain set of linear equations.a) Trueb) False 2. What should be the value of y(n) at n=0?a) 0b) -1c) 1d) None of the mentioned […]

This set of Digital Signal Processing Multiple Choice Questions & Answers (MCQs) focuses on “Analog Domain Frequency Transformations”. 1. Which of the following is the backward design equation for a low pass-to-low pass transformation?a) ΩS=ΩSΩub) ΩS=ΩuΩ′Sc) Ω’S=ΩSΩud) ΩS=Ω′SΩu 2. If A=−Ω21+ΩuΩlΩ1(Ωu−Ωl) and B=Ω22−ΩuΩlΩ2(Ωu−Ωl), then which of the following is the backward design equation for a low […]

This set of Digital Signal Processing Multiple Choice Questions & Answers (MCQs) focuses on “Digital Filter Characteristics”. 1. The frequency transformation in the digital domain involves replacing the variable z-1 with a rational function g(z-1).a) Trueb) False 2. The mapping z-1 → g(z-1) must map inside the unit circle in the z-plane into __________a) Outside the unit […]