Signals-and-systems Questions Set 55:
What is the Laplace transform of eat?
Solution:
For attenuation of high frequencies, we should use:
Solution:
Find the value of the integral f(t) = ∫ cos(t-2)δ(2t-4) dt, where the integration is from -∞ to +∞.
Solution:
The inverse DTFT of X(ejΩ) = jsin(4Ω) is:
Solution:
If the inverse Laplace transform of F(s) is f(t), what is the inverse Laplace transform of s⋅F(s) provided f(0) = 0?
Solution:
The type of systems in which the input and output can take any value within a particular set of values are called?
Solution:
Which of the following statements about even signals is false?
Solution:
Assertion (A): Free space does not interfere with normal radiation and propagation of radio waves
Reason (R): Free space has no magnetic or gravitational fields
Solution:
A 10-bit shift register is used to generate the pseudorandom sequence in a DS spread spectrum system. The chip duration is Tc = m, and the bit duration is Tb = NTc, where N is the length (period) of the m-sequence. If the required ε/J0 for a tone jammer is 10 dB, and the jammer has an average power Jav, then the jamming margin is:
Solution:
Match the following items from List I and List II.
List I
a. Amplitude modulation
b. Pulse Code Modulation
c. Frequency modulation
d. Double sideband suppressed carrier
List II
i. Pre-emphasis and de-emphasis
ii. Companding
iii. Envelope detector
iv. Balance modulator
Solution:
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