Digital Communication Questions and Answers
Q1.
In non uniform quantization, the quantization noise is _____ to signal size.
Answer :
Directly proportional
Q2.
The standard value of A in A-law is
Answer :
87.6
Q3.
What is bit depth?
Answer :
Number of possible digital values to represent each sample
Q4.
Sample resolution for LPCM ____ bits per sample.
Answer :
1. 8
2. 16
3. 24
Q5.
Saturation noises can be avoided or reduced by
Answer :
Automatic gain control
Q6.
Signal to noise ratio increases as _____ increases.
Answer :
Square of quantization level
Q7.
The fourier tranform of one impulse train is also another impulse train with a period of the output equal to the
Answer :
Reciprocal of the period of input signal
Q8.
Flat top sampling or practical sampling has
Answer :
Same amplitude
Q9.
The index value n, in transversal filter can be used as.
Answer :
Time offset & Filter coefficient identifier
Q10.
The disadvantage of preset equalizer is that
Answer :
Time varying channel degrades the performance of the system
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