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Communications
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Noise In Digital Communication
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1
GATE ECE 2003
MCQ (Single Correct Answer)
+2
-0.6
A signal is sampled at 8 KHz and is quantized using 8-bit uniform quantizer. Assuming $$SN{R_q}$$ for a sinusoidal signal, the correct statement for PCM signal with a bit rate of R is
A
R = 32 kbps, $$SN{R_q}$$ = 25.8 dB
B
R = 64 kbps, $$SN{R_q}$$ = 49.8 dB
C
R = 64 kbps, $$SN{R_q}$$ = 55.8 dB
D
R = 32 kbps, $$SN{R_q}$$ = 49.8 dB
2
GATE ECE 2003
MCQ (Single Correct Answer)
+2
-0.6
If S represents the carrier synchronization at the receiver and $$\rho $$ represents the bandwidth efficiency, then the correct statement for the coherent binary PSK is
A
$$\rho = 0.5,\,S$$ is required
B
$$\rho = 1.0,\,S$$ is required
C
$$\rho = 0.5,\,S$$ is not required
D
$$\rho = 1.0,\,S $$ is not required
3
GATE ECE 2000
MCQ (Single Correct Answer)
+2
-0.6
In a digital communication system employing Frequency Shift Keying (FSK), the 0 and 1 bit are represented by sine waves of 10 KHz and 25 KHz respectively. These waveforms will be orthogonal for a bit interval of
A
$$45\,\,\mu \sec $$
B
$$200\,\,\mu \sec $$
C
$$50\,\,\mu \sec $$
D
$$250\,\,\mu \sec $$
4
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
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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