ELL727 weekly quiz-5
Authored by Vivek Venkataraman
Engineering
University
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5 questions
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1.
FILL IN THE BLANK QUESTION
1 min • 1 pt
A digital TV transmission using binary PCM consists of 5 TDM video channels. Each channel has a signal bandwidth of 500 kHz, sampled at 20% above the Nyquist rate and quantized to 1024 levels. The net bit-rate (in Mbps) of of this TV transmission is
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A delta-modulation system operates at a sampling rate of 2 kHz with comparator/quantization levels ±2 mV. If the input signal is m(t) = kt, the maximum value of k (in V/s) that avoids slope overload is
1
4
2
8
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The PSD of which of the following pulse shapes (defined over the range [0, Tb]) has a null at DC?
cos(πt/2Tb)
sin(πt/2Tb)
cos(πt/Tb)
sin(πt/Tb)
4.
FILL IN THE BLANK QUESTION
1 min • 1 pt
What is the nearest neighbour symbol correlation R1 = <akak+1> (where <...> denotes average over all samples k) for a 4-PAM line code with possible symbol values {-3, -1, 1, 3}?
5.
FILL IN THE BLANK QUESTION
1 min • 1 pt
What is the symbol mean-square value R0 = <ak2> (where <...> denotes average over all samples k) for a 4-PAM line code with possible symbol values {-3, -1, 1, 3}?
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