Home
Courses
About
School
Notes
Questions
MCQ
Contact
Vocational Courses
Digital Communications
Digital Communications
Noise
Question 1
Marks :
+2
|
-2
Pass Ratio :
100%
Which consists of less ISI?
Nyquist filter
Raised cosine filter
Nyquist & Raised cosine filter
None of the mentioned
Explanation:
Raised cosine filter results in less ISI than Nyquist filter.
Question 2
Marks :
+2
|
-2
Pass Ratio :
100%
Shot noise is avoidable when current is
Zero
One
Infinity
None of the mentioned
Explanation:
Shot noise is avoidable only when the current is zero.
Question 3
Marks :
+2
|
-2
Pass Ratio :
100%
Thermal noise is
Energy signal
Power signal
Energy & Power signal
None of the mentioned
Explanation:
Thermal noise is considered as power signal as it has infinite energy.
Question 4
Marks :
+2
|
-2
Pass Ratio :
100%
Which occurs due to equilibrium fluctuations?
Thermal noise
Johnson noise
Thermal & Johnson noise
None of the mentioned
Explanation:
Thermal noise occurs due to equilibrium fluctuations. This noise is also called as Johnson noise.
Question 5
Marks :
+2
|
-2
Pass Ratio :
100%
Noise has
Infinite energy
Infinite power
Infinite energy & power
None of the mentioned
Explanation:
Noise has infinite energy signal.
Question 6
Marks :
+2
|
-2
Pass Ratio :
100%
Matched filtering operation includes
Spectral phase matching
Spectral amplitude matching
Spectral phase & amplitude matching
None of the mentioned
Explanation:
Matched filtering includes two operations – spectral amplitude matching and spectral phase matching.
Question 7
Marks :
+2
|
-2
Pass Ratio :
100%
Which has the same power spectral density?
White noise
Brown noise
White & Brown noise
None of the mentioned
Explanation:
White noise has same power spectral density where as it decreases in case of brown noise.
Question 8
Marks :
+2
|
-2
Pass Ratio :
100%
Which noise is useful for dithering?
White noise
Pink noise
Brown noise
None of the mentioned
Explanation:
Brown noise is sometimes useful for dithering.
Question 9
Marks :
+2
|
-2
Pass Ratio :
100%
Flicker noise is called as
White noise
Pink noise
Brown noise
None of the mentioned
Explanation:
Flicker noise is called as pink noise.
Question 10
Marks :
+2
|
-2
Pass Ratio :
100%
The maximum likelihood function is
Positive
Negative
Any of the mentioned
None of the mentioned
Explanation:
The maximum likelihood function is always positive.
1
2
3
4
5
6
7
8
9
10
Time Left:
Submit
Score
:
Rank
:
Accuracy
:
%
Time
:
Total Question
:
Attempted
:
Correct
:
Wrong
:
User Name
Email Id
Mobile No
Submit