1
GATE ECE 2022
MCQ (More than One Correct Answer)
+1
-0.33
Let H(X) denote the entropy of a discrete random variable X taking K possible distinct real values. Which of the following statements is/are necessarily true?
2
GATE ECE 2022
Numerical
+1
-0.33
A symbol stream contains alternate QPSK and 16-QAM symbols. If symbols from this stream are transmitted at the rate of 1 mega-symbols per second, the raw (uncoded) data rate is _________ mega-bits per second (rounded off to one decimal place).
Your input ____
3
GATE ECE 2017 Set 1
MCQ (Single Correct Answer)
+1
-0.3
In a digital communication system, the overall pulse shape p(t) at the receiver before the
sampler has the Fourier transform P(f). If the symbols are transmitted at the rate of 2000
symbols per second, for which of the following cases is inter symbol interference zero?
A
B
C
D
4
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?
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 Discrete Time Signal Fourier Series Fourier Transform Discrete Time Signal Z Transform Continuous Time Linear Invariant System Transmission of Signal Through Continuous Time LTI Systems Discrete Time Linear Time Invariant Systems Sampling Continuous Time Signal Laplace Transform Discrete Fourier Transform and Fast Fourier Transform Transmission of Signal Through Discrete Time Lti Systems Miscellaneous Fourier Transform
Communications
Electromagnetics
General Aptitude