1
GATE ECE 2013
MCQ (Single Correct Answer)
+1
-0.3
The bit rate of a digital communication system is R kbits/s. The modulation used is 32-QAM. The minimum bandwidth required for ISI free transmission is
2
GATE ECE 2004
MCQ (Single Correct Answer)
+1
-0.3
In a PCM system, if the code word length is increased from 6 to 8 bits, the signal to quantization noise ratio improves by the factor
3
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
4
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
Questions Asked from Digital Communication Systems (Marks 1)
Number in Brackets after Paper Indicates No. of Questions
GATE ECE Subjects
Signals and Systems
Representation of Continuous Time Signal Fourier Series Fourier Transform Continuous Time Signal Laplace Transform Discrete Time Signal Fourier Series Fourier Transform Discrete Fourier Transform and Fast Fourier Transform Discrete Time Signal Z Transform Continuous Time Linear Invariant System Discrete Time Linear Time Invariant Systems Transmission of Signal Through Continuous Time LTI Systems Sampling Transmission of Signal Through Discrete Time Lti Systems Miscellaneous
Network Theory
Control Systems
Digital Circuits
General Aptitude
Electronic Devices and VLSI
Analog Circuits
Engineering Mathematics
Microprocessors
Communications
Electromagnetics