# IVC 5G O-RAN Summary

###### tags: `UNILA`

## Summary 3 Wireless Communication

Nama : Hans Khalif Hafif
Student ID : 1915031078
Team : A-3

• Wireless Communication is the fastest growing and most vibrant technological areas in the communication field. Wireless Communication is a method of transmitting information from one point to other, without using any connection like wires, cables or any physical medium.
Generally, in a communication system, information is transmitted from transmitter to receiver that are placed over a limited distance. With the help of Wireless Communication, the transmitter and receiver can be placed anywhere between few meters (like a T.V. Remote Control) to few thousand kilometers (Satellite Communication).
Communication Systems can be Wired or Wireless and the medium used for communication can be Guided or Unguided. In Wired Communication, the medium is a physical path like Co-axial Cables, Twisted Pair Cables and Optical Fiber Links etc. which guides the signal to propagate from one point to other.
Such type of medium is called Guided Medium. On the other hand, Wireless Communication doesn’t require any physical medium but propagates the signal through space. Since, space only allows for signal transmission without any guidance, the medium used in Wireless Communication is called Unguided Medium.
If there is no physical medium, then how does wireless communication transmit signals? Even though there are no cables used in wireless communication, the transmission and reception of signals is accomplished with Antennas.
Antennas are electrical devices that transform the electrical signals to radio signals in the form of Electromagnetic (EM) Waves and vice versa. These Electromagnetic Waves propagates through space. Hence, both transmitter and receiver consists of an antenna
Since the use of smoke signals, flags and flashing mirrors in the pre – historic period, Wireless communication has been a part of human life and it is continuously evolving. Modern Wireless Communication i.e., using electrical signals and radio waves for communication has been around us for more than 100 years.
In the year 1897, Guglielmo Marconi successfully demonstrated the Wireless Telegraphy by sending EM Waves for a short distance of 100 meters. This demonstration paved way for Radio Communication and the term Radio is derived from Radiant Energy.
By early 1900’s, Trans – Atlantic radio transmission had been established, where Marconi successfully transmitted messages in the form of Morse code. Since then, the technology related to wireless communication and wireless system has advanced rapidly and thus enabling transmissions over longer distances at low cost with cheaper devices.
Throughout the development of wireless communication, there are many wireless systems and methods that flourished and many got disappeared. The best example for this is Telephone Communication and Television Transmission. Initially, all telephone related communication was carried out (and still is) using wired network, which we call it as Landline Telephone.
But the rapid growth of Mobile Communication started to replace the complex wired telephone system. In this scenario, the wired technology became outdated and got replaced by wireless communication.
Another scenario where wireless communication got replaced by wired communication is Television broadcasting. In the early days, television signals were broadcasted using wireless radio transmitters. But this setup got replaced by cable television.
These two examples point out that with the development of technology, we always have to choose what’s best for the situation i.e., in some areas we have to use wired communication whereas in the other, going for wireless may be a better option.