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📡 Digital Communication 📡

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Digital Communication :- Data transmission, digital transmission or digital communications is the physical transfer of data (a digital bit stream or a digitized analog signal) over a point-to-point or point-to-multipoint communication channel. Examples of such channels are copper wires, optical fibers, wireless communication channels, storage media and computer buses. The data are represented as an electromagnetic signal, such as an electrical voltage, radiowave, microwave, or infrared signal. Block Diagram :- A  digital communication system  consists of six basic blocks. The functional blocks at the transmitter are responsible for processing the input message, encoding, modulating, and transmitting over the  communication  channel. digital communication system Multiplexing :- Multiplexing  is the process of combining multiple signals into one signal, over a shared medium. These signals, if analog in nature, the process is called as  analog multiplexing . If digital signals are multipl
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📡 Satellite Communication 🛰️

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Introduction to Satellite Communication :- The purpose of communications satellites is to relay the signal around the curve of the Earth allowing communication between widely separated geographical points. Communications satellites use a wide range of radio and microwave frequencies. A  communications satellite  is an artificial  satellite  that relays and amplifies radio telecommunications signals via a transponder; it creates a  communication  channel between a source transmitter and a receiver at different locations on Earth.   Satellite communication  has two main  components: the ground segment, which consists of fixed or mobile transmission, reception, and  ancillary  equipment, and the space segment, which primarily is the satellite itself. How to Work :- Satellites communicate by using radio waves to send signals to the antennas on the Earth. The antennas then capture those signals and process the information coming from those signals .                     Intelsat VI, a c
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SATELLITE On 4 October 1957 the Soviet  Union  launched the world's first artificial satellite,  Sputnik 1 . Since then, about 8,900 satellites from more than 40 countries have been launched. There are over 2,500 satellites in orbit around the Earth. India has created history by launching a record 104 satellites on a single mission. The speed a satellite must travel to stay in space is called its orbital velocity. It usually needs to be more than 17,500 mph (28,200 km/h). There are nine  different types  of  satellites  i.e. Communications  Satellite , Remote Sensing  Satellite , Navigation  Satellite , LEO, MEO, HEO, GPS, GEOs, Drone  Satellite , Ground  Satellite , Polar  Satellite .
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