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 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