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Communications
Analog Communication Systems
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Digital Communication Systems
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Random Signals and Noise
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Fundamentals of Information Theory
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Noise In Digital Communication
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1
GATE ECE 2008
MCQ (Single Correct Answer)
+2
-0.6
A speech signal, band limited to 4 kHz and peak voltage varying between + 5V and - 5V is sampled at the Nyquist rate. Each sample is quantized and represented by 8 bits.

If the bits 0 and 1 are transmitted using bipolar pulses, the minimum bandwidth required for distortion free transmission is

A
64 kHz
B
32 kHz
C
8 kHz
D
4 kHz.
2
GATE ECE 2008
MCQ (Single Correct Answer)
+2
-0.6
A speech signal, band limited to 4kHz and peak voltage varying between +5V and -5V is sampled at the Nyquist rate. Each sample is quantized and represented by 8 bits.

The number of quantitization levels required to reduce the quantization noise by a factor of 4 would be

A
1024
B
512
C
256
D
64
3
GATE ECE 2007
MCQ (Single Correct Answer)
+2
-0.6
In delta modulation, the slope overload distortion can be reduced by
A
decreasing the step size
B
decreasing the granular noise
C
decreasing the sampling rate
D
increasing the step size
4
GATE ECE 2007
MCQ (Single Correct Answer)
+2
-0.6
In a Direct sequence CDMA system the chip rate is $$1.2288\,\, \times \,\,{10^6}$$ chips per second. If the processing gain is desired to be at least 100. The data rate
A
must be less than or equal to $$12.288\,\, \times \,\,{10^3}$$ bits per sec.
B
must be greater than $$12.288\,\, \times \,\,{10^3}$$ bits per sec.
C
must be exactly equal to $$12.288\,\, \times \,\,{10^3}$$ bits per sec.
D
can take any value less than $$12.288\,\, \times \,\,{10^3}$$ bits per sec.
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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