1

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

2

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 interval3

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 are4

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

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