WIRELESS COMMUNICATION

Wireless communication is the transfer of information over a distance without the use of electrical conductors or "wires". The distances involved may be short (a few meters as in television remote control) or long (thousands or millions of kilometers for radio communications). Wireless communication is generally considered to be a branch of telecommunications.

It encompasses various types of fixed, mobile, and portable two-way radios, cellular telephones, personal digital assistants (PDAs), and wireless networking. Other examples of wireless technology include GPS units, garage door openers and or garage doors, wireless computer mice, keyboards and headsets, satellite television and cordless telephones.

Wireless operations permits services, such as long-range communications, that are impossible or impractical to implement with the use of wires. The term is commonly used in the telecommunications industry to refer to telecommunications systems (e.g. radio transmitters and receivers, remote controls, computer networks, network terminals, etc.) which use some form of energy (e.g. radio frequency (RF), infrared light, laser light, visible light, acoustic energy, etc.) to transfer information without the use of wires. Information is transferred in this manner over both short and long distances.

In 1895, Guglielmo Marconi opened the way for modern wireless communications by transmitting the three-dot Morse code for the letter ‘S’ over a distance of three kilometers using electromagnetic waves. From this beginning, wireless communications has developed into a key element of modern society.

From satellite transmission, radio and television broadcasting to the now ubiquitous mobile telephone, wireless communications has revolutionized the way societies function.

Wireless communications and the economic goods and services that utilise it have some special characteristics that have motivated specialised studies. First, wireless communications relies on a scarce resource – namely, radio spectrum. Second, use of spectrum for wireless communications required the development of key complementary technologies; especially those that allowed higher frequencies to be utilised more efficiently. Finally, because of its special nature, the efficient use of spectrum required the coordinated development of standards. Those standards in turn played a critical role in the diffusion of technologies that relied on spectrum use.

 ADVANTAGES

Anywhere, Anytime Work

Through wireless communication, working professionals and mobile workers can work and access the Internet just about anywhere, anytime without the hassles of wires and network cables.

Enhanced Productivity

Workers, students, professionals and others need not be constrained by wired Internet connections or dial-up connectivity. Wireless Internet connectivity options ensures that work and assignments can be completed anywhere and enhance overall productivity of all concerned.

Remote Area Connectivity

Workers, doctors and other professionals working in remote-location hospitals and medical centers can keep in touch with anyone through wireless communication. Non-profit organization volunteers working in remote and underserved areas can stay connected to the outside world with the help of wireless communication.

On-Demand Entertainment Bonanza

For those unable to keep away from their daily soap operas, reality-programs, online TV shows and Internet surfing or download activities, wireless communication ensures an entertainment bonanza on--demand and anytime.

Emergency Alerts

Through wireless communication, many emergency situations and crisis situations can be addressed quickly. Help and other assistance can reach affected areas quickly through early alerts and warnings provided with the help of wireless communication.

DISADVANTAGES

Wireless communications are limited by the range of the transmitter

Cost of wireless communication system and components are high

When transmitting data, users must sometimes send smaller bits of data so the information moves more quickly. The size of the device that's accessing the information is also still an issue.

Many applications need to be reconfigured if they are going to be used through wireless connections.

Most client/server applications rely on a persistent connection, which is not the case with wireless.

Since radio waves travel through the atmosphere they can be disturbed by electrical interferences (such as lightning) that cause static.

CONCLUSION

Wireless communication is the transfer of information over a distance without the use of electrical conductors or "wires". It encompasses various types of fixed, mobile, and portable two-way radios, cellular telephones, personal digital assistants (PDAs), and wireless networking.Wireless communications begin with a message that is converted into an electronic signal by a device called a transmitter. The encoded electronic signal is then sent as a radio wave. Devices known as receivers decode or demodulate the radio waves and reproduce the original message over a speaker.There are 4 types wireless communication; they are Infrared Wireless Transmission, Broadcast Radio, Microwave Radio, Communications Satellites.

Wireless communication is employed for a wide range of applications such as Broadcasting services, Mobile communications of voice and data, Fixed Services, Satellite, Cellular telephones and pagers, Global Positioning System , Cordless computer peripherals, Wireless gaming, Security systems, Wi-Fi, Wireless energy transfer.Therefore wireless communication is advantageous over the wired communication as we can work without the hassles of wires and network cables and enhance overall productivity and also at a higher speed.