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Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 20
1.
A bit synchronizer regenerates at the receiver a clock waveform which is
synchronous with original clock waveform
out of phase by 180° with original clock waveform
out of phase by 90° with the original clock waveform
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
2.
Probability of error in DPSK is less than PSK
true
false
equal
depend upon noise
Answer: Option
Explanation:
No answer description is available. Let's discuss.
3.
Zero mean Gaussian noise of variance N is applied to a half wave rectifier. The mean squared value of the rectified output will be
0
N/2
N/2
N
Answer: Option
Explanation:
No answer description is available. Let's discuss.
4.
Two sine waves of amplitude A1 and A2 are multiplied. The amplitude of the spectral component is
A1A2
(A1A2)1/2
Answer: Option
Explanation:
No answer description is available. Let's discuss.
5.
In radar display system PPI stands for
Pulse Position Indicator
Plan Position Indicator
Phase Position Indicator
Point Position Indicator
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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