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Communications
Analog Communication Systems
Marks 1Marks 2
Digital Communication Systems
Marks 1Marks 2Marks 8Marks 10
Random Signals and Noise
Marks 1Marks 2Marks 4
Fundamentals of Information Theory
Marks 1Marks 2
Noise In Digital Communication
Marks 1Marks 2
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1
GATE ECE 1998
MCQ (Single Correct Answer)
+1
-0.3
A DSB-SC signal is generated using the carrier $$\cos\left(\omega_ct\;+\;\theta\right)$$ and modulating singal x(t). The envelope of the DSB-SC signal is
A
x(t)
B
$$\left|x\left(t\right)\right|$$
C
only positive portion of x(t)
D
$$x\left(t\right)\cos\left(\theta\right)$$
2
GATE ECE 1998
MCQ (Single Correct Answer)
+1
-0.3
The image channel selectivity of super heterodyne receiver depends upon
A
IF amplifiers only
B
RF and IF amplifiers only
C
Preselector, RF and IF amplifiers
D
Pre selector, and RF amplifiers only
3
GATE ECE 1994
MCQ (Single Correct Answer)
+1
-0.3
$$v\left(t\right)\;=5\left[\cos\left(10^6\mathrm{Ï€t}\right)\;-\;\sin\left(10^3\mathrm{Ï€t}\right)\times\sin\left(10^6\mathrm{Ï€t}\right)\right]$$ represents
A
DSB suppressed carrier signal
B
AM signal
C
SSB upper sideband signal
D
Narrow band FM signal
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Questions Asked from Marks 1
GATE ECE 2025 (2) GATE ECE 2024 (1) GATE ECE 2016 Set 1 (1) GATE ECE 2016 Set 3 (1) GATE ECE 2015 Set 1 (1) GATE ECE 2014 Set 3 (1) GATE ECE 2010 (1) GATE ECE 2008 (1) GATE ECE 2005 (1) GATE ECE 2004 (2) GATE ECE 2002 (1) GATE ECE 1999 (1) GATE ECE 1998 (2) GATE ECE 1994 (1)
GATE ECE Subjects
Signals and Systems
Network Theory
Control Systems
Digital Circuits
General Aptitude
Electronic Devices and VLSI
Analog Circuits
Engineering Mathematics
Microprocessors
Communications
Electromagnetics