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Digital Signal Processing
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Digital Signal Processing
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25 Questions

1. Which of the following operation is performed by the blocks given the figure below?
2. Which of the following is done to convert a continuous time signal into discrete time signal?
3. The phase function of a discrete time signal x(n)=an, where a=r.ej? is:
4. If
5. 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?
6. The difference between the unquantized x(n) and quantized xq(n) is known as:
7. Which of the following is not suitable either as low pass or a high pass filter?
8. If x(n) is a discrete-time signal, then the value of x(n) at non integer value of
9. In DM, further the two integrators at encode are replaced by one integrator placed before comparator, and then such system is called?
10. In which of the following, sampling rate conversion are used?
11. Let x1(t) and x2(t) be periodic signals with fundamental periods T1 and T2 respectively. Then the fundamental period of x(t)=x1(t)+x2(t) is:
12. The roots of the equation H(z) must occur in:
13. The process of converting discrete-time continuous valued signal into discrete-time discrete valued(digital) signal is known as:
14. The discrete time function defined as u(n)=n for n=0;=0 for n<0 is an:
15. What is the value of h(M-1/2) if the unit sample response is anti-symmetric?
16. Let x1(t) and x2(t) be periodic signals with fundamental periods T1 and T2 respectively. Which of the following must be a rational number for x(t)=x1(t)+x2(t) to be periodic?
17. Which of the following use quadrature mirror filters?
18. In IIR Filter design by the Bilinear Transformation, the Bilinear Transformation is a mapping from
19. What is output signal when a signal x(t)=cos(2*pi*40*t) is sampled with a sampling frequency of 20Hz?
20. What is the number of filter coefficients that specify the frequency response for h(n) symmetric?
21. What is the discrete-time signal obtained after sampling the analog signal x(t)=cos(2000*pi*t)+sin(5000*pi*t) at a sampling rate of 5000samples/sec?
22. If Fx and Fy are the sampling rates of the input and output signals respectively, then what is the value of Fy/Fx?
23. Which of the following is the advantage of sampling rate conversion by converting the signal into analog signal?
24. The signal given by the equation4 is known as:
25. The anti-symmetric condition with M even is not used in the design of which of the following linear-phase FIR filter?

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