1

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 t

_{1}$$ \le $$ t $$ \le $$ t_{2}. This indicates that during this interval2

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 are3

GATE ECE 2001

MCQ (Single Correct Answer)

+1

-0.3

A band limited signal is sampled at the Nyquist rate. The signal can be recovered by passing the samples through

4

GATE ECE 1998

MCQ (Single Correct Answer)

+1

-0.3

Compression in PCM refers to relative compression of

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