Wifi Technology

I. Introduction It stands as perhaps the signal success of the computer industry in the last few years, a rare bright spot in a bubble-battered market. advances in wireless telecommunications technology are converging with Internet technology to foster new generations of applications and services. Presently, the United States and other countries are moving to third-generation (3G) and fourth-generation mobile telephony. The defining feature of these technologies is that transmission speeds are significantly faster than prevailing technology, making it possible to provide services such as high speed access to the Internet and to receive broadcast television programs. A related trend is the growth in use of Wi-Fi (wireless fidelity) and WiMAX (an industry designation for a specific broadband standard). Wi-Fi uses local wireless networks for high-speed mobile access to the Internet and also provides wireless Internet access for laptop computers Homes, offices, colleges and schools around the world have installed Wi-Fi equipment to blanket their premises with wireless access to the internet. Yet merely 10 years ago wireless networking was a niche technology.So lets know what wi-fi exactly means,how it got started and it working.

The term ‘Wi-Fi’

it first used commercially in August 1999, was coined by a brand-consulting firm called Interbrand Corporation that the Alliance had hired to determine a name that was "a little catchier than 'IEEE 802.11b Direct Sequence'"The Wi-Fi Alliance initially used an advertising slogan for Wi-Fi, "The Standard for Wireless Fidelity",but later removed the phrase from their marketing

II. history Wi-Fi uses both single carrier direct-sequence spread spectrum radio technology, part of the larger family of spread spectrum systems and multi-carrier OFDM (Orthogonal Frequency Division Multiplexing) radio technology . Unlicensed spread spectrum was first authorized by the Federal Communications