Signal and Systems
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Signal and Systems
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25 Questions

1. Why are the negative & positive phase shifts introduced for positive & negative frequencies respectively in amplitude and phase spectra?
2. Damped sinusoids are _____
3. Which property of periodic signal in DTFS gets completely clarified / identified by the equation x (n – n0)?
4. A Laplace Transform exists when ______ A. The function is piece-wise continuous B. The function is of exponential order C. The function is piecewise discrete D. The function is of differential order
5. Which among the below mentioned standard PDFs is/are applicable to discrete random variables?
6. A random variable belongs to the category of a uniform PDF only when ______
7. Which type/s of Fourier Series allow/s to represent the negative frequencies by plotting the double-sided spectrum for the analysis of periodic signals?
8. The ESD of a real valued energy signal is always _________
9. Which mathematical notation specifies the condition of periodicity for a continuous time signal?
10. Which among the below assertions is precise in accordance to the effect of time scaling? A : Inverse relationship exists between the time and frequency domain representation of signal B : A signal must be necessarily limited in time as well as frequency domains
11. Which among the below specified conditions/cases of discrete time in terms of real constant ‘a’, represents the double-sided decaying exponential signal?
12. What does an each outcome in the sample space regarded as?
13. Which function has a provision of determining the similarity between the signal and its delayed version?
14. An equalizer used to compensate the distortion in the communication system by faithful recovery of an original signal is nothing but an illustration of _________
15. Recursive Systems are basically characterized by the dependency of its output on _______
16. An amplitude of sinc function that passes through zero at multiple values of an independent variable ‘x’ ______
17. When is the system said to be causal as well as stable in accordance to pole/zero of ROC specified by system transfer function?
18. An impulse response of the system at initially rest condition is basically a response to its input & hence also regarded as,
19. Correlogram is a graph of ______
20. Duality Theorem / Property of Fourier Transform states that _________
21. What is the nature of Fourier representation of a discrete &  aperiodic signal?
22. Which is/are the mandatory condition/s to get satisfied by the transfer function for the purpose of distortionless transmission?
23. As the signalling rate increases, _______
24. Which block of the discrete time systems requires memory in order to store the previous input?
25. Which type/s of discrete-time system do/does not exhibit the necessity of any feedback?

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