Multiplexing in communication
Multiplexing Multiplexing is a technique, which allows many users to share a single communication channel (wire, cable, radio link, fiber
Read moreMonth: August 2018
Sampling in PCM | Digital Communications
Sampling Sampling is the 2nd process in PCM, which is done after band-limiting the message signal. The process by which
Read moreUnguided Transmission Media
Unguided transmission unguided transmission media do not use any physical connection between source and destination. They use air or free-space
Read moreQuantization in PCM with example
QUANTIZATION The PCM signal is generated by carrying out following basic operations: Band limiting (using LPF) Sampling Quantizing Encoding Two
Read moreTypes Communication Channels
Types Communication Channels The Channel provides the electrical connection between the source and destination. It is a physical path between
Read moreSignal Bandwidth vs Channel Bandwidth
BANDWIDTH Bandwidth is the difference between upper and lower frequency limits of the signal It is defined as the range
Read moreAntenna Measurements | Communication Systems
Antenna Measurements The antenna is an important element of radio communication, remote sensing and radio localisation systems. The measurement of
Read moreOFDM | Orthogonal Frequency Division Multiplexing
OFDM = Orthogonal FDM = Orthogonal Frequency Division Multiplexing Modulation is fundamental requirement in any communication system. Multi means two or
Read moreDirect Sequence Spread Spectrum | DSSS
Direct Sequence Spread Spectrum (DSSS) Radio communication suffers from following problems: Interference Jamming Multipath propagation & fading Secure communication INTERFERENCE:
Read moreTypes of Antennas | Communication Systems
Types of Antennas Antennas are broadly classified based on the following parameters: Wavelength (or frequency of operation) Frequency range of
Read moreAntenna Basic Principles
Antenna basic principles An antenna can be a length of wire, a metal rod, or a piece of tubing. Many
Read moreInformation theory and Coding basics
Information theory Information theory is theoretical part of communication developed by American mathematician Shannon. It deals with mathematical modelling and
Read moreBooting of Computer | Introduction to Computer
Booting Booting is the process of loading operating system (OS) into main memory (RAM) and readying a computer system for
Read moreDifferences between Compiler, Interpreter & Assembler
Compiler, interpreter and assembler Compiler, interpreter and assembler are computer language translators. So, before knowing about compiler, interpreter and assembler,
Read moreFrequency, Wavelength and Phase of a signal
Frequency (f) Frequency is defined as the number of cycles completed by the wave in one second i.e., number of
Read moreAnalog versus Digital Communications
Analog versus Digital Communications Analog signal is a continuous signal and takes infinite number of amplitude values. Note that ‘Majority
Read moreAnalog versus Digital signals
ANALOG – DIGITAL SIGNALS There are two types of signals analog and digital. All naturally available signals are analog in
Read moreAlgorithm and Flowchart concept
Algorithm An algorithm is defined as sequence of steps to solve a problem (task). The steps must be finite, well
Read moreDatabase Concepts
DATABASE CONCEPTS Records (Rows) Fields (Columns) Tables Files DBMS Columns also known as Fields A record is a group of
Read moreDBMS Basics
INTRODUCTION TO DATABASE Unknowingly we come across data in our day to day life. The age of a person, the
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