Wireless technology

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Handheld wireless radios such as this Maritime VHF radio transceiver use electromagnetic waves to implement a form of wireless communications technology.

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. Wireless technologies have become increasingly popular in our everyday business and personal lives. Cell phones offer users a freedom of movement unbelievable just over 10 years ago. Personal Digital Assistants (PDA) allow individuals to access calendars, e-mail, address and phone numbers lists, and the Internet. Global positioning system (GPS) that the location of the device anywhere in the world. Wireless technologies promise to offer even more features and functions in the next few years. An increasing number of government agencies, business, and home users are using wireless technologies in their environments.

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Overview of Wireless Technology

Wireless technologies are enabling one or more devices to communicate without physical connections – without requiring network cabling. Wireless technology aims to provide users access to information anywhere – it allows mobility. Wireless technologies use radio transmissions for transmitting data, whereas wired technologies use cables.

Wireless technologies range from complex systems, such as:


* Cell phones

Simple device such as

* Wireless headphone

* Microphones

Infrared devices such as

* Remote Controls

* Cordless computer keyboards

* Mice

In this article, a brief overview of critical elements of wireless is presented: wireless networks, wireless devices, wireless standards,

Wireless Networks

Wireless networks are categorized into three groups based on their coverage range:




Ø WWAN: WWAN representing wireless wide area networks includes wide coverage area technologies such as 2G cellular, Cellular Digital Packet Data (CDPD). Global System for Mobile Communications (GSM)

Ø WLAN: WLAN representing wireless local area networks, WLAN connect computers and other components to the network using an access point device. It communicates with devices with wireless network adaptors. It’s coverage areas of 300 feet access point cells linked together within a building or between buildings

Ø WPAN: WPAN representing wireless personal area network technologies such as Bluetooth and infrared.

All of these technologies are “join less” –receive and transmit information using electromagnetic (EM) waves.

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