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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 1999
MCQ (Single Correct Answer)
+2
-0.6
Four independent messages have bandwidths of 100Hz, 100 Hz, 200Hz and 400Hz respectively. Each is sampled at the Nyquist rate, and the samples are time division multiplexed (TDM) and transmitted. The transmitted sample rate )in Hz) is
A
1600
B
800
C
400
D
200
2
GATE ECE 1996
MCQ (Single Correct Answer)
+2
-0.6
The number of bits in a binary PCM system is increased from n to n+1. As a result, the signal to quantization noise ratio will improve by a factor
A
$$\left( {n + 1} \right)/n$$
B
$${2^{\left( {n + 1} \right)/n}}$$
C
$${2^{2\left( {n + 1} \right)/n}}$$
D
which is independent of n
3
GATE ECE 1992
MCQ (Single Correct Answer)
+2
-0.6
The bit stream 01001 is differentially encoded using 'Delay and Ex OR' scheme for DPSK transmission. Assuming the reference bit as a '1' and assigning phases of '0' and '$$\,\pi $$' for 1's and 0's respectively, in the encoded sequence, the transmitted phase sequence becomes
A
$$\,\pi $$ 0$$\,\pi $$ $$\,\pi $$ 0
B
0 $$\,\pi $$ $$\,\pi $$ 0 0
C
0 $$\,\pi $$ $$\,\pi $$ $$\,\pi $$ 0
D
$$\,\pi $$ $$\,\pi $$ 0$$\,\pi $$ $$\,\pi $$
4
GATE ECE 1992
MCQ (Single Correct Answer)
+2
-0.6
Coherent demodulation of FSK signal can be effected using
A
correlation receiver
B
band pass filters and envelope detectors
C
matched filter
D
discriminator detection
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Questions Asked from Marks 2
GATE ECE 2024 (1) GATE ECE 2022 (1) GATE ECE 2017 Set 1 (1) GATE ECE 2016 Set 3 (1) GATE ECE 2016 Set 2 (1) GATE ECE 2015 Set 1 (2) GATE ECE 2014 Set 4 (1) GATE ECE 2014 Set 3 (2) GATE ECE 2014 Set 2 (1) GATE ECE 2008 (4) GATE ECE 2007 (4) GATE ECE 2006 (1) GATE ECE 2004 (3) GATE ECE 2003 (3) GATE ECE 2000 (1) GATE ECE 1999 (1) GATE ECE 1996 (1) GATE ECE 1992 (3) GATE ECE 1991 (1) GATE ECE 1990 (1) GATE ECE 1989 (1) GATE ECE 1988 (2)
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