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Digital Signal Processing
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Digital Signal Processing
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25 Questions

1. What is the process of converting a signal from a given rate to a different rate?
2. 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:
3. What is output signal when a signal x(t)=cos(2*pi*40*t) is sampled with a sampling frequency of 20Hz?
4. What is the z-transform of the signal x(n)=[3(2n)-4(3n)]u(n)?
5. For a continuous time signal x(t) to be periodic with a period T, then x(t+mT) should be equal to:
6. x(t) or x(n) is defined to be an energy signal, if and only if the total energy content of the signal is a:
7. According to Time shifting property of z-transform, if X(z) is the z-transform of x(n) then what is the z-transform of x(n-k)?
8. 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?
9. The difference between the unquantized x(n) and quantized xq(n) is known as:
10. What is the number of filter coefficients that specify the frequency response for h(n) anti-symmetric?
11. The process of converting discrete-time continuous valued signal into discrete-time discrete valued(digital) signal is known as:
12. The anti-symmetric condition with M even is not used in the design of which of the following linear-phase FIR filter?
13. What is the number of filter coefficients that specify the frequency response for h(n) symmetric?
14. Which of the following operation is performed by the blocks given the figure below?
15. What is the period of cos2t+sin3t?
16. The phase function of a discrete time signal x(n)=an, where a=r.ej? is:
17. What is the process of increasing the sampling rate by a factor I?
18. What is the value of h(M-1/2) if the unit sample response is anti-symmetric?
19. What are the main characteristics of Anti aliasing filter?
20. When the frequency band is selected we can specify the sampling rate and the characteristics of the pre filter, which is also called as __ filter?
21. In D/A converter, the application of the input code word results in a high-amplitude transient, called?
22. In which of the following, sampling rate conversion are used?
23. The roots of the equation H(z) must occur in:
24. If W4100=Wx200, then what is the value of x?
25. What is the DFT of the four point sequence x(n)={0,1,2,3}?

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