1
GATE ECE 2005
MCQ (Single Correct Answer)
+2
-0.6
A signal as shown in figure is applied to a matched filter. Which of the following does represent the output of this matched filter? GATE ECE 2005 Communications - Noise In Digital Communication Question 28 English
A
GATE ECE 2005 Communications - Noise In Digital Communication Question 28 English Option 1
B
GATE ECE 2005 Communications - Noise In Digital Communication Question 28 English Option 2
C
GATE ECE 2005 Communications - Noise In Digital Communication Question 28 English Option 3
D
GATE ECE 2005 Communications - Noise In Digital Communication Question 28 English Option 4 v
2
GATE ECE 2005
MCQ (Single Correct Answer)
+2
-0.6
A symmetric three-level midtread quantizer is to be designed assuming equiprobable occurrence of all quantization levels.

If the input probability density function is divided into three regions as shown in figure, the value of 'a' in the figure is

GATE ECE 2005 Communications - Noise In Digital Communication Question 27 English
A
$${1 \over 3}$$
B
$${2 \over 3}$$
C
$${1 \over 2}$$
D
$${1 \over 4}$$
3
GATE ECE 2005
MCQ (Single Correct Answer)
+2
-0.6
A symmetric three-level midtread quantizer is to be designed assuming equiprobable occurrence of all quantization levels.

The quantization noise power for the quantization region between –a and +a in the figure is

A
$${4 \over 81}$$
B
$${1 \over 9}$$
C
$${5 \over 81}$$
D
$${2 \over 81}$$
4
GATE ECE 2004
MCQ (Single Correct Answer)
+2
-0.6
Consider a binary digital communication system with equally likely $$0’s$$ and $$1’s$$. When binary $$0$$ is transmitted the voltage at the detector input can lie between the levels $$-0.25V$$ and $$+0.25V$$ with equal probability when binary $$1$$ is transmitted, the voltage at the detector can have any value between $$0$$and $$1 V$$ with equal probability. If the detector has a threshold of $$2.0V$$ (i.e., if the received signal is greater than $$0.2 V$$, the bit is taken as $$1$$), the average bit error probability is
A
$$0.15$$
B
$$0.2$$
C
$$0.05$$
D
$$0.5$$
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