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 29 English
A
GATE ECE 2005 Communications - Noise In Digital Communication Question 29 English Option 1
B
GATE ECE 2005 Communications - Noise In Digital Communication Question 29 English Option 2
C
GATE ECE 2005 Communications - Noise In Digital Communication Question 29 English Option 3
D
GATE ECE 2005 Communications - Noise In Digital Communication Question 29 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.

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
$${2 \over 81}$$
3
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
$$0.5$$
4
GATE ECE 2003
MCQ (Single Correct Answer)
+2
-0.6
If Eb, the energy per bit of a binary digital signal, is 10-5 watt-sec and the one-sided power spectral density of the white noise, N0 = 10-6 W/Hz, then the output SNR of the matched filter is
A
26 dB
B
10 dB
C
20 dB
D
13 dB
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