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Digital Communication Practice Test: Signals and Spectra
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Signals and Spectra topic include: Various aspects of signals and spectra which include signal classification, digital communication signal processing, autocorrelation, concepts of noise, process types and information on baseband systems. A signal's spectrum is a representation of its magnitude and phase characteristics as a function of frequency. A signal can be thought of as a composition of multiple sinusoidal signals with different amplitude, frequency, and phase. The spectrum shows the amplitude and phase as a function of the frequency of the sinusoidal components that make up the... Show more
Digital Communication Practice Test: Signals and Spectra
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25 Questions

1. Digital communication is _______ to environmental changes?
2. Formatting is the process which includes
3. A stationary stochastic process has
4. What are the advantages of digital circuits?
5. Matched filtering operation includes
6. Which are the common transmission media used in digital communication system?
7. Random process is a function of ______
8. The distribution function of random variable is
9. Shot noise is produced by
10. Noise has
11. Find the 32-ary waveform for the word ‘THINK’.
12. Advantages of digital communication are
13. Which occurs due to equilibrium fluctuations?
14. Standard deviation is ______
15. Which block or device does the data compression?
16. A signal can be recovered from its sample by using
17. Find the fundamental period of 1+sin^2 (3π/5)n.
18. Pulse shaping is done by which block or system?
19. For the number of bits, k=1 and number of symbols, M=2 the system is called as
20. Which filter has maximum flatness?
21. Spectogram is the graph plotted against?
22. What are the disadvantages of digital communication?
23. White noise has _____ mean and ______ variance.
24. Find the 32-ary waveform for the word ‘HAPPY’.
25. Determine the periodicity and also find whether it is a power or energy signal?
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