ExamSIDE
Questions (Powered by ExamGOAL)
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
Previous
1
GATE ECE 2000
MCQ (Single Correct Answer)
+2
-0.6
In an FM system, a carrier of 100 MHz is modulated by a sinusoidal signal of 5 KHz. The bandwidth by Carson’s approximation is 1 MHz. If y(t) = (modulated waveform)3, then by using Carson’s approximation, the bandwidth of y(t) around 300 MHz and the and the spacing of spectral components are, respectively.
A
3 MHz, 5 KHz
B
1 MHz, 15 KHz
C
3 MHz, 15 KHz
D
1 MHz, 5 KHz
2
GATE ECE 1993
Numerical
+2
-0
A superheterodyne radio receiver with an intermediate frequency of 455 KHz is tuned to a station operating at 1200 KHz. The associated image frequency is ______ KHz.
Your input ____
3
GATE ECE 1993
MCQ (Single Correct Answer)
+2
-0.6
Which of the following demodulator(s) can be used for demodulating the signal $$x(t)\;=\;5\left(1+2\;\cos200\mathrm{Ï€t}\right)\cos\;20000\;\mathrm{Ï€t}$$ .
A
Envelope demodulator
B
square law demodulator
C
synchronous demodulator
D
None of the above
4
GATE ECE 1992
MCQ (Single Correct Answer)
+2
-0.6
The maximum power efficiency of an AM modulator is
A
25%
B
50%
C
75%
D
100%
Previous
Questions Asked from Marks 2
GATE ECE 2023 (2) GATE ECE 2022 (1) GATE ECE 2017 Set 2 (2) GATE ECE 2015 Set 1 (1) GATE ECE 2012 (1) GATE ECE 2008 (1) GATE ECE 2007 (1) GATE ECE 2006 (1) GATE ECE 2005 (2) GATE ECE 2004 (1) GATE ECE 2003 (3) GATE ECE 2000 (1) GATE ECE 1993 (2) GATE ECE 1992 (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