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Principle of Communication Engineering: Analog and Digital Pulse Modulation & Demodulation
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Principle of Communication Engineering: Analog and Digital Pulse Modulation & Demodulation
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25 Questions

1. Which of the following requires a synchronizing signal?
2. Types of analog pulse modulation systems are
3. Coherent demodulation of FSK signal can be performed using
4. Which of the following is false with respect to pulse modulation?
5. The digital modulation scheme in which the step size is not fixed is
6. What is the output voltage if the input voltage of a compander with a maximum voltage range of 1 V and a μ of 255 is 0.25?
7. The desired signal of maximum frequency wm centered at frequency w=0 may be recovered if
8. TDM is less immune to cross-talk in channel than FDM.
9. The use of non uniform quantization leads to
10. Which of the following is not a form of pulse modulation?
11. Power consumption is low in pulse modulation.
12. A distorted signal of frequency fm is recovered from a sampled signal if the sampling frequency fs is
13. The digital modulation technique in which the step size is varied according to the variation in the slope of the input is called
14. In different types of Pulse Width Modulation,
15. Pulse time modulation (PTM) includes
16. In Pulse time modulation (PTM),
17. Flat top sampling of low pass signals
18. Which principle specifies the relationship between enclosure of poles & zeros by s-plane contour and the encirclement of origin by q(s) plane contour?
19. In Pulse Position Modulation, the drawbacks are
20. Consider the system represented by the equation given below. What would be the total phase value at ω = 0?200/[s3 (s + 3) (s + 6) (s + 10)].
21. Pulse modulation is not used in which of the following?
22. Calculate the minimum sampling rate to avoid aliasing when a continuous time signal is given by x(t) = 5 cos 400πt
23. In polar plots, if a pole is added at the origin, what would be the value of the magnitude at Ω = 0?
24. For Nyquist contour, the size of radius is _______
25. According to Nyquist stability criterion, where should be the position of all zeros of q(s) corresponding to s-plane?

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