Wireless Communication, Transmission, and Its Types

Wireless Communication, Transmission, and Its Types 

The term wireless communication was introduced in the 19th century and wireless communication technology has evolved in subsequent years. It is the most important means of transmitting information from one device to another. In this technique, information can be transmitted through the air without the need for any cable or wiring or other electronic conductors, such as by using electromagnetic waves like IR, RF, satellite, etc.

What is Wireless Communication?

Wireless Transmission: -

                                       Wireless also says unguided, in this type of transmission, no physical medium is used to send information to the recipient from the sender, rather the sky is used, it is then necessary to do so. When the sender or receiver or both are not stationary, i.e. mobile, they have no place due to mobile, so it is not possible to insert any physical transmission medium between them, hence the use of the wireless transmission is done. Sometimes, even in such cases, wireless transmission is used, where it is not possible to insert the physical cable or is very difficult, such as on mountains, in dense forests, in the sea, in snowy areas, etc.
Information is transferred to the electromagnetic waves in the wireless transmission and left in the sky by an antenna. Those waves are captured by the receiver of the receiver and converted to basic information, wireless transmission is used by radio and television, sometimes financially wireless transmission is much cheaper than wired transmission. And it is also simple, so nowadays gradually the use of the wireless transmission is increasing.
Wireless devices communicate information through the following two types of signals.

Wireless communication is the fastest growing area in the communication sector. Wireless communication is a method of transmitting information from one point to another, without using any connection such as wires, cables, or any physical medium. Generally, in a communication system, transmitters are transmitted from the transmitter to the receiver, which is kept at a limited distance. With the help of wireless communication, the transmitter and receiver can be placed anywhere between a few meters (eg TV remote control) to a few thousand kilometers (satellite communication). Some of the commonly used wireless communication systems in our day-to-day life are mobile phones, GPS receivers, remote control, Bluetooth audio, and Wi-Fi, etc.

The communication system can be wired or wireless, and the medium used for communication can be guided or unguided. In wired communication, the medium can be a physical path such as Co-axial Cables, Twisted Pair Cables, and Optical Fiber Links, etc. that guide the signal to propagate from one point to another.

Such a medium is called Guided Medium. On the other hand, wireless communication does not require any physical medium, but it promotes the signal through space. If there is no physical medium, how does wireless communication transmit signals? Even though there are no cables used in wireless communication, the transmission and reception of the signal are accomplished with an antenna.



Antennae are electrical appliances that turn electrical signals into radio signals as electromagnetic (EM) waves and vice versa. These electromagnetic waves propagate through space. Therefore, both the transmitter and receiver have an antenna.

In the present day, the wireless communication system has become an essential part of various types of wireless communication devices, which allows the user to communicate with remote operated areas. Wireless communication such as mobiles. Cordless telephones, Zigbee wirelss technology, GPS, Wi-Fi, satellite television and wireless computer parts | Current wireless phones include 3G and 4G networks, Bluetooth and Wi-Fi technology.



During the development of wireless communication, many wireless systems and methods have evolved, the best example being telephone communication and television transmission. But the rapid growth of mobile communication began to replace the complex wired telephone system. In this scenario, wired technology became outdated and replaced by wireless communication.

These two examples show that with the development of technology, we have to always choose what is best for the situation i.e. in some areas we would be good to use wired communication and in some areas, wireless may be a better option is.

Types of Wireless Communication 

Today, people need many things for mobile phones such as talking, internet, multimedia, etc. All these services should be made available on mobile to the user, with the help of these wireless communication services, we can transfer voice, data, video, pictures, etc. Wireless communication systems also provide various services such as video conferencing, cellular telephone, paging, TV, radio, etc. Different types of wireless communication systems develop due to the need for different types of communication services. 

Important wireless communication systems  are:

• Television and Radio Broadcasting
• Satellite Communication
• Radar
• Mobile Telephone System (Cellular Communication)
• Global Positioning System (GPS)
• Infrared communication
• WLAN (Wi-Fi)
• Bluetooth
• Paging
• Cordless Phones
• Radio Frequency Identification (RFID)
• Television and Radio Broadcasting

Radio is considered to be the first wireless service to broadcast. This is an example of a simplex communication system where information is transmitted in only one direction and all users receive the same data
.
Mobile Telephone Communication System
Probably, the most commonly used wireless communication system is mobile phone technology. The development of mobile cellular devices changed the world like any other technology. Today's mobile phones are not limited to calling only but are integrated with many other features like Bluetooth, Wi-Fi, GPS and FM radio.

Global Positioning System (GPS)

GPS is completely a subcategory of satellite communication. With the help of GPS dedicated GPS receivers and satellites, various wireless services such as navigation, positioning, location, speed, etc. provide.

Satellite Communication

The satellite communication system is an important type of wireless communication. Satellite communication networks provide worldwide independent coverage for population density. Satellite communication systems depend on other wireless services such as mobile, television broadcasts and other radio systems, satellite communication systems such as telecommunication (satellite phones), positioning and navigation (GPS), broadcast, internet, etc.

Zigbee
A low-powered, wireless mesh network that operates in the following radio bands: 868MHz, 915MHz, and 2.4GHz are known as Zigbee.

Z Wave
This is a relatively new wireless home automation protocol. It uses very little power and runs on a network net. The device communicates in a sub-GHz frequency range, around 900MHz.

LiFi

The light uses the field of view of the electromagnetic spectrum for fidelity or Li-Fi communication. It can be easily used in places where Bluetooth, IR, and Wi-Fi are banned, as it uses light instead of radio waves.