Long Range Wireless Technology

This system, developed under the code name Project Angel, also had the distinction of being one of the more important deployments of wireless broadband happened in the socalled multichannel multipoint distribution services MMDS band at 2. 5GHz. LMDSbased services were targeted at business users and in the late enjoyed rapid but shortlived success. Following the commercialization of the Internet in the demand for Internetaccess services began to surge, and many saw providing highspeed Internetaccess as way for wireless systems to differentiate themselves.

Both of these technologies typically provide up to few hundred kilobits per second. Problems obtaining access to rooftops for installing antennas, coupled with its shorterrange capabilities, squashed its growth. In the late one of the first commercial wireless systems to differentiate themselves. In the group began work on enhancements to the specifications to allow vehicular mobility applications. Many solved the NLOS problem by using such techniques as orthogonal frequency division multiplexing OFDM, code division multiple access CDMA, and multiantenna processing. This staggering growth of the Internet is driving demand for higherspeed Internetaccess services, leading to parallel growth in broadband adoption.

Wireless mobile services grew from million subscribers worldwide in to more than million by Problems obtaining access to rooftops for installing antennas, coupled with its shorterrange capabilities, squashed its growth. In the late one of the more important deployments of wireless broadband happened in the socalled multichannel multipoint distribution services MMDS band at 2. 5GHz. In the group began work on enhancements to the specifications to allow vehicular mobility applications. This type, called fixed wireless broadband, can be thought of as competitive alternative to traditional wirelineaccess technologies.

These systems varied widely in their performance capabilities, protocols, frequency spectrum used, applications supported, and host of other parameters. Besides the OFDM physical layers, 802. 16a also specified additional MAClayer options, including support for orthogonal frequency division multiplexing OFDM, code division multiple access CDMA standards continue to be deployed in these markets. In markets in which robust localloop infrastructure already existed for voice telephony, WLL systems had to offer additional value to be competitive.

The advent of satellite TV ruined the wireless cable business, and operators were looking for alternative ways to use this spectrum. During the same period, the Internet grew from being curious academic tool to having about billion users. few megabits per second possible. The emergence of WiMAX as an industry standard is expected to change this situation. Given the wide variety of options. LMDSbased services were targeted at business users and in the late enjoyed rapid but shortlived success. few operators began to offer oneway wireless Internetaccess service, using telephone line as the return path.