Gopal Krishna, Author at EngineersTutor

Direct Sequence Spread Spectrum | DSSS

August 4, 2018November 11, 2018 Gopal Krishna 14439 Views 0 Comments antenna, BPSK, chipping code, direct sequence spread spectrum, DSSS, DSSS waveforms, fading, Fourier Transform, interference, jamming, multipath propagation, PN sequence, pseudo noise, radio communication, WLAN, XOR

Direct Sequence Spread Spectrum (DSSS) Radio communication suffers from following problems: Interference Jamming Multipath propagation & fading Secure communication INTERFERENCE:

Antenna Communications

Types of Antennas | Communication Systems

August 3, 2018November 10, 2018 Gopal Krishna 4175 Views 0 Comments antenna types, aperture antennas, circular loop, circular polarization, dipole, elliptical, helical antennas, horn, lens antennas, linear, loop antennas, polarisation, radar, rectangular loop, reflector antenna, satellite, wavelength, wire antennas, yagi uda antenna

Types of Antennas Antennas are broadly classified based on the following parameters: Wavelength (or frequency of operation) Frequency range of

Antenna Communications

Antenna Basic Principles

August 3, 2018November 10, 2018 Gopal Krishna 6842 Views 0 Comments antenna, antenna height, EM field, EM radiation, guided and unguided media, half wavelength antennas, quarter wavelength, radar, transmission lines

Antenna basic principles An antenna can be a length of wire, a metal rod, or a piece of tubing. Many

Digital Communications

Information theory and Coding basics

August 3, 2018September 15, 2020 Gopal Krishna 4498 Views 0 Comments amount of information, information theory and coding, mathematical modelling of a communication system, probability, shannon

Information theory Information theory is theoretical part of communication developed by American mathematician Shannon. It deals with mathematical modelling and

Computer Fundamentals

Booting of Computer | Introduction to Computer

August 3, 2018November 22, 2018 Gopal Krishna 6507 Views 0 Comments Basic Input Output System, BIOS, Boot Files, booting, bootstrap loader, bootstrapping, CMOS, IO.SYS, MS-DOS.SYS, POST, Power On Self Test, RAM, ROM

Booting Booting is the process of loading operating system (OS) into main memory (RAM) and readying a computer system for

Computer Fundamentals

Differences between Compiler, Interpreter & Assembler

August 3, 2018November 22, 2018 Gopal Krishna 5654 Views 0 Comments 8085, 8086, assembler, C, COBOL, compiler, FORTRAN, interpreter, java, Programming languages, Smalltalk, source program

Compiler, interpreter and assembler Compiler, interpreter and assembler are computer language translators. So, before knowing about compiler, interpreter and assembler,

Introduction to Communication Systems

Frequency, Wavelength and Phase of a signal

August 2, 2018November 12, 2018 Gopal Krishna 19463 Views 0 Comments electromagnetic wave, EM wave, frequency, phase delay phase advance, phase of a signal, radio wave, time period, wavelength

Frequency (f) Frequency is defined as the number of cycles completed by the wave in one second i.e., number of

Introduction to Communication Systems

Analog versus Digital Communications

August 2, 2018November 12, 2018 Gopal Krishna 2687 Views 0 Comments ADC, analog communication, analog to digital conversion, Bandwidth, DAC, digital communication, digital to analog conversion, FDM, Frequency division multiplexing, TDM, time division multiplexing

Analog versus Digital Communications Analog signal is a continuous signal and takes infinite number of amplitude values. Note that ‘Majority

Introduction to Communication Systems

Analog versus Digital signals

August 2, 2018November 12, 2018 Gopal Krishna 3165 Views 0 Comments analog signal, analog transmission, bit, digital signal, digital transmission, discrete signal, repeater

ANALOG – DIGITAL SIGNALS There are two types of signals analog and digital. All naturally available signals are analog in

Algorithms and Flowcharts

Algorithm and Flowchart concept

August 2, 2018September 8, 2020 Gopal Krishna 8742 Views 0 Comments algorithm, flowchart, problem solving steps, program

Algorithm An algorithm is defined as sequence of steps to solve a problem (task). The steps must be finite, well

Computer Fundamentals

Database Concepts

August 2, 2018November 22, 2018 Gopal Krishna 3298 Views 0 Comments access, applications, database concepts, dBase, DBMS, DBMS advantages, disadvantages, fields, MySQL, oracle, records, SQL, tables

DATABASE CONCEPTS Records (Rows) Fields (Columns) Tables Files DBMS Columns also known as Fields A record is a group of

Computer Fundamentals

DBMS Basics

August 2, 2018November 22, 2018 Gopal Krishna 1888 Views 0 Comments concept of data and information, data, data types, database, database approach, file based database approach, information, paper based approach

INTRODUCTION TO DATABASE Unknowingly we come across data in our day to day life. The age of a person, the

Computer Fundamentals

What is Computer Hardware? | Introduction to Computer

August 1, 2018November 22, 2018 Gopal Krishna 2546 Views 0 Comments bus, computer hardware, CPU, dual core, external bus, external ports, graphics, graphics card, harddisk, input devices, keyboard, memory, mouse, output device, pointing device, ports, sound card, storage, system bus, video card

COMPUTER HARDWARE Computers made up of pieces of electronic circuits for performing calculations. Hardware of a computer consists of electronic

Computer Fundamentals

What is Computer Software? | Introduction to Computer

August 1, 2018November 22, 2018 Gopal Krishna 5424 Views 0 Comments application software, assembler, compiler, Computer, debuggers, device drivers, hardware, interpreter, operating system, software, software utilities, system software

COMPUTER SOFTWARE Computer system is consists of hardware and software. Hardware is physical components of computer system. Software is intangible

Computer Fundamentals

Compiler, Interpreter, Assembler | Introduction to Computer

August 1, 2018November 23, 2018 Gopal Krishna 10459 Views 0 Comments 8085. 8086, assembler, C, compiler, high level languages, interpreter, java, language translators, low level languages, machine language, source program, target program

Compiler, Interpreter, Assembler Compiler, interpreter and assembler are computer language translators. So, before knowing about compiler, interpreter and assembler, one

Computer Fundamentals

RAM | Random Access Memory

August 1, 2018November 23, 2018 Gopal Krishna 2194 Views 0 Comments bit, bus, byte, CPU, Giga, kilo, main memory, Mega, memory locations, nible, primary memory, RAM, Random Access Memory, secondary storage, system memory, Tera

RAM (Random Access Memory) One of the important abilities of a computer is its ability to remember. Computer has internal

Computer Fundamentals

Computer System Block Diagram

August 1, 2018November 23, 2018 Gopal Krishna 10717 Views 0 Comments ALU, arithmetic and logic unit, Computer, control unit, CPU, CU, data, instruction, processor, processor speed, RAM, Random Access Memory, real life examples of computer components, registers, secondary memory, storage, word size

COMPUTER SYSTEM The name computer is derived from the word COMPUTING. Also rumor acronym for COMPUTER is: Commonly Operated Machine

C++ Programming

Introduction to Object Oriented Programming in C++

August 1, 2018November 10, 2018 Gopal Krishna 32939 Views 0 Comments class, data abstraction, encapsulation, inheritance, object, object oriented, OOP, polymorphism, procedure oriented, structure

OOP refers to implementation of a program using OBJECTS. In object-oriented programming, a system can be viewed as objects that

Antenna Communications

Introduction to Antenna communications

July 31, 2018November 10, 2018 Gopal Krishna 4282 Views 0 Comments aerial, antenna, diplexer, directivity, electro magnetic waves, EM waves, gain, radio

Introduction Antenna is a vital (important) component of any wireless communication system. Also we cannot think of wireless communication without antenna.

Principles of Operating System