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Communications
Analog Communication Systems
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Random Signals and Noise
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Noise In Digital Communication
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1
GATE ECE 2004
MCQ (Single Correct Answer)
+1
-0.3
In the output of a DM speech encoder, the consecutive pulses are of opposite polarity during time interval t1 $$ \le $$ t $$ \le $$ t2. This indicates that during this interval
A
the input to the modulator is essentially constant.
B
the modulator is going through slope overload.
C
the accumulator is in saturation.
D
the speech signal is being sampled at the Nyquist rate.
2
GATE ECE 2002
MCQ (Single Correct Answer)
+1
-0.3
For a bit-rate of 8 kbps, the best possible values of the transmitted frequencies in a coherent binary FSK system are
A
16 KHz and 20 KHz
B
20 KHz and 32 KHz
C
20 KHz and 40 KHz
D
32 KHz and 40 KHz
3
GATE ECE 2001
MCQ (Single Correct Answer)
+1
-0.3
A band limited signal is sampled at the Nyquist rate. The signal can be recovered by passing the samples through
A
an RC filter
B
an envelope detector
C
a PLL
D
an ideal low-pass filter with the appropriate bandwidth
4
GATE ECE 1998
MCQ (Single Correct Answer)
+1
-0.3
Quadrature multiplexing is
A
the same as FDM
B
the same as TDM
C
a combination of FDM and TDM
D
quite different from FDM and TDM
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Questions Asked from Marks 1
GATE ECE 2024 (1) GATE ECE 2022 (2) GATE ECE 2017 Set 1 (2) GATE ECE 2016 Set 2 (1) GATE ECE 2016 Set 1 (1) GATE ECE 2015 Set 3 (1) GATE ECE 2014 Set 1 (1) GATE ECE 2013 (1) GATE ECE 2004 (2) GATE ECE 2002 (1) GATE ECE 2001 (1) GATE ECE 1998 (4) GATE ECE 1997 (2) GATE ECE 1995 (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