Digital Communication Questions and Answers
Q1.
Non uniform quantization provides better quantization for
Answer :
Weak signals
Q2.
What is the standard value of μ in μ-law ?
Answer :
255
Q3.
In PCM encoding, quantization level varies as a function of ___
Answer :
Amplitude
Q4.
Delta modulation uses _____ bits per sample.
Answer :
One
Q5.
In quantization process, the amount of quantization noise is _____ to number of levels.
Answer :
Inversely proportional
Q6.
The _______ corresponds to average quantization noise power.
Answer :
Variance
Q7.
According to Sampling theorem
Answer :
Ts is lesser than or equal to 1/2fm
Q8.
Which process is more economical?
Answer :
Oversampling
Q9.
Pseudo noise signal has ____ and ____ SNR for the same peak transmitted power.
Answer :
Larger, larger
Q10.
Preamble is used for
Answer :
1. Detect start of transmission
2. To set automatic gain control
3. To align internal clocks
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