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Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 15
1.
If a signal band limited for fm is sampled at a rate less than 2 fm the reconstructed signal will be
smaller in amplitude
distorted
having higher frequencies suppressed
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
2.
A better SNR can be obtained in a PCM by
increasing sampling rate above Nyquist rate
decreasing the code bits
reducing channel bandwidth
increasing Quantization levels
Answer: Option
Explanation:
No answer description is available. Let's discuss.
3.
The baud rate is
always equal to the bit transfer rate
equal to twice the bandwidth of an ideal channel
not equal to the signalling rate
equal to one half the bandwidth of ideal channel
Answer: Option
Explanation:
No answer description is available. Let's discuss.
4.
The type of noise that interfere very much with high frequency transmission is
white
transit time
flicker
shot
Answer: Option
Explanation:
No answer description is available. Let's discuss.
5.
In communication systems, the modulating signal is also called
base band signal
side bands
auxiliary signal
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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