Comprehensive Viva Questions On Digital Communication
1.
The first
communication was Telegraphy a digital system
2.
The input
transducer converts Myriad signal
in to Analog Electric Signals
3.
Communication
channel is the physical
medium between transmitter and receiver0
4.
Absolute
band width is the interval
between frequencies
5.
The
simplest mathematical method for a communication channel is the Additive
Noise Channel
6.
Rician
Distribution is used
in the envelope detection of digitally modulated signals
7.
The
implementation of a sampler is most commonly done with the help of Sample
and Hold circuit
8.
The
processing pair Compression and Expansion is collectively referred as Compading
9.
Noise
with uniform spectral density is called White Noise
10. There is an algorithm known as Levinson-Durbin
Algorithm by which the co-efficient can be solved recursively
11.
The
Huffman code can be applied to M-Ray source
12. Cyclic Redundancy Check Codes are good at detecting burst of
errors
13. Viterbi Algorithm is an optimal decoder in the class of
maximum likelihood detectors
14. Ideally a QPSK signal has a constant
amplitude
15. The estimation of carrier phase and
frequency is called Carrier Recovery
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