1
GATE ECE 2014 Set 3
Numerical
+2
-0
In a PCA system, the signal $$m(t) = \{ \sin (100\,\pi \,t)\, + \cos (100\,\pi \,t\} $$ V is sampled at the Nyquist rate. The samples are processed by a uniform quantizer with step size 0.75 V. The minimum data rate of the PCM system in bits per second is________________
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2
GATE ECE 2014 Set 3
Numerical
+2
-0
A binary random variable X takes the value of 1 with probability 1/3. X is input to a casade of 2 independent identical binary symmetric channels (BSCs) each with crossover probability 1/2. The output of BSCs are the random variables $${Y_1}$$ and $${Y_2}$$ as shown in the figure. GATE ECE 2014 Set 3 Communications - Digital Communication Systems Question 12 English
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3
GATE ECE 2014 Set 2
Numerical
+2
-0
The input to a 1-bit quantizer is a random variable X with pdf $${f_x}(x) = 2{e^{ - 2x}}\,\,for\,\,x \ge 0$$ and $${f_x}(x) = 0\,\,for\,\,x\, < \,0$$. For outputs to be of equal probability, the quantizer threshold should be _______________.
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4
GATE ECE 2008
MCQ (Single Correct Answer)
+2
-0.6
Four messages band limited to W, W, 2 W and 3 W respectively are to be multiplexed using Time Division Multiplexing (TDM). The minimum bandwidth required for transmission of this TDM signal is
A
1 W
B
3 W
C
6 W
D
7 W
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