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Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 16
46.
Johnson noise is
white for all Practical application
always white
depends on temperature
never white
Answer: Option
Explanation:
No answer description is available. Let's discuss.
47.
Which of the following is unlikely to happen when quantising noise is decreased in PCM?
Increased bandwidth
Increased channel noise
Increased number of standard levels
All of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
48.
For real and odd signals, the Fourier series coefficient an is
purely imaginary
purely real and even
purely imaginary and odd
purely real and odd
Answer: Option
Explanation:
No answer description is available. Let's discuss.
49.
An amplitude modulated wave is
e = 50 (1 + 0.4 cos 1000 t + 0.3 cos 10000 t) cos 107 t
0.5
0.3
0.7
0.4
Answer: Option
Explanation:
No answer description is available. Let's discuss.
50.
The efficiency of a horn speaker is about
10%
40%
60%
80%
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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