GATE ECE 1987 | Random Signals and Noise Question 55 | Communications

GATE ECE 1987

MCQ (Single Correct Answer)

-0.6

The variance of a random variable X is $$\sigma _x^2\,.$$ Then the variance of - kx (where k is a positive constant ) is

$$\sigma _x^2\,$$

- k $$\sigma _x^2\,$$

k $$\sigma _x^2\,$$

$${k^2}\,\sigma _x^2\,$$

GATE ECE 1987

MCQ (Single Correct Answer)

-0.6

White Gaussian noise is passed through a linear narrow band filter. The probability density function of the envelope of the noise at the filter output is:

Uniform

Poisson

Gaussian

Rayleigh

GATE ECE Subjects

Browse all chapters by subject

Control Systems

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

Engineering Mathematics

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

Analog Circuits

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

Network Theory

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

Electromagnetics

Maxwell Equations Transmission Lines Uniform Plane Waves Antennas Waveguides Miscellaneous

Electronic Devices and VLSI

PN Junction Semiconductor Physics IC Basics and MOSFET BJT and FET

Digital Circuits

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

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

Communications

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

General Aptitude

Verbal Ability Logical Reasoning Numerical Ability