GATE ECE 1988 | Digital Communication Systems Question 69 | Communications

GATE ECE 1988

MCQ (Single Correct Answer)

-0.6

The message bit sequence input to a DPSK modulator is 1, 1, 0, 0, 1, 1. The carrier phase during the reception of the first two message bits is $$\pi ,\,\,\pi $$. The carrier phase for the remaining four message bits is

$$\pi $$, $$\pi $$, 0, $$\pi $$

0, 0, $$\pi $$, $$\pi $$

0, $$\pi $$, $$\pi $$, $$\pi $$

$$\pi $$, $$\pi $$, 0, 0

GATE ECE Subjects

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General Aptitude

Verbal Ability Logical Reasoning Numerical Ability

Network Theory

Network Elements State Equations For Networks Network Graphs Miscellaneous Sinusoidal Steady State Response Network Theorems Two Port Networks Transient Response

Microprocessors

Pin Details of 8085 and Interfacing with 8085 Instruction Set and Programming with 8085

Signals and Systems

Discrete Time Signal Fourier Series Fourier Transform Continuous Time Signal Laplace Transform Fourier Transform Discrete Fourier Transform and Fast Fourier Transform Representation of Continuous Time Signal Fourier Series Discrete Time Linear Time Invariant Systems Transmission of Signal Through Continuous Time LTI Systems Transmission of Signal Through Discrete Time Lti Systems Miscellaneous Continuous Time Linear Invariant System Discrete Time Signal Z Transform Sampling

Electromagnetics

Waveguides Miscellaneous Antennas Transmission Lines Uniform Plane Waves Maxwell Equations

Digital Circuits

Logic Families Analog to Digital and Digital to Analog Converters Boolean Algebra Semiconductor Memories Number System and Code Convertions Logic Gates Combinational Circuits Sequential Circuits

Electronic Devices and VLSI

PN Junction Semiconductor Physics IC Basics and MOSFET BJT and FET

Control Systems

Time Response Analysis Signal Flow Graph and Block Diagram State Space Analysis Basic of Control Systems Compensators Root Locus Diagram Stability Frequency Response Analysis

Communications

Analog Communication Systems Noise In Digital Communication Random Signals and Noise Fundamentals of Information Theory Digital Communication Systems

Engineering Mathematics

Probability and Statistics Transform Theory Numerical Methods Calculus Differential Equations Linear Algebra Vector Calculus Complex Variable

Analog Circuits

Frequency Response Operational Amplifier Power Amplifier Diodes Oscillators Feedback Amplifier 555 Timer Bipolar Junction Transistor FET and MOSFET