Digital Communication Questions and Answers
Q1.
The DPSK needs ______ Eb/N0 than BPSK.
Answer :
1db more
Q2.
Amplitude distortion occurs when
Answer :
Frequency transfer function is not constant
Q3.
Transversal equalizers are _____ and decision feedback equalizers are _____
Answer :
Feed forward, feed back
Q4.
According to the rule of minimizing the error probabilities, the hypothesis should be like if the priori probabilities are ______ than the ratio of likelihoods.
Answer :
Lesser
Q5.
The symbol of the probability under the tail of Gaussian pdf is called as
Answer :
Complementary error & Co error function
Q6.
If each pulse of the sequence to be detected is in _____ shape, the pulse can be detected without ISI.
Answer :
Sinc
Q7.
Roll off factor is the fraction of
Answer :
Excess bandwidth and minimum nyquist bandwidth
Q8.
The causes for error performance degradation in communication systems are
Answer :
1. Interference
2. Electrical noise
3. Effect of filtering
Q9.
The composite equalizing filter is the combination of
Answer :
Receiving and equalizing filter
Q10.
The limit which represents the threshold Eb/N0 value below which reliable communication cannot be maintained is called as
Answer :
Shannon limit
🎕🎕🎕
🎕🎕🎕
0 Comments