1
GATE ECE 2017 Set 1
MCQ (Single Correct Answer)
+1
-0.3
Which one of the following statements about differential pulse code modulation (DPCM) is true?
2
GATE ECE 2016 Set 2
Numerical
+1
-0
A speech signal is sampled at 8 kHz and encoded into PCM format using 8 bits/sample. The PCM data is transmitted through a baseband channel via 4-level PAM. The minimum bandwidth (in kHz) required for transmission is _________.
Your input ____
3
GATE ECE 2016 Set 1
Numerical
+1
-0
Consider binary data transmission at a rate of 56 kbps using baseband binary pulse amplitude modulation (PAM) that is designed to have a raised-cosine spectrum. The transmission bandwidth (in kHz) required for a roll-off factor of 0.25 is ______.
Your input ____
4
GATE ECE 2015 Set 3
MCQ (Single Correct Answer)
+1
-0.3
The modulation scheme commonly used for transmission from GSM mobile terminals is
Questions Asked from Digital Communication Systems (Marks 1)
Number in Brackets after Paper Indicates No. of Questions
GATE ECE Subjects
Network Theory
Control Systems
Electronic Devices and VLSI
Analog Circuits
Digital Circuits
Microprocessors
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
Communications
Electromagnetics
General Aptitude