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Antenna diversity, also known as space diversity or spatial diversity, is any one of several wireless diversity schemes that uses two or more antennas to improve the quality and reliability of a wireless link. Often, especially in urban and indoor environments, there is no clear line-of-sight (LOS) between transmitter and receiver.
The AT&T High Seas Service was a radiotelephone service that provided ship-to-shore telephone calls, which consisted of stations WOO (transmitter station in Ocean Gate, New Jersey), receiver station in Manahawkin, New Jersey, United States), WOM ([Receiver site in Plantation, Florida; transmitter on Krome Ave. and KMI (transmitter station in Dixon, California), receiver station in Point Reyes ...
Parent. AT&T Corporation (1984–2005) AT&T Inc. (2005–2010) Website. www .att .com. AT&T Communications, Inc., doing business as AT&T Communications, was a division of the AT&T Corporation that, through 23 subsidiaries, provided interexchange carrier and long-distance telephone services.
AT&T Wireless Services, Inc., formerly part of AT&T Corporation, was a wireless telephone carrier founded in 1987 in the United States, based in Redmond, Washington, and later traded on the New York Stock Exchange under the stock symbol "AWE", as a separate entity from its former parent. On October 26, 2004, AT&T Wireless was acquired by ...
Whip antenna on a walkie-talkie. In radio communication, an omnidirectional antenna is a class of antenna which radiates equal radio power in all directions perpendicular to an axis ( azimuthal directions), with power varying with angle to the axis ( elevation angle ), declining to zero on the axis. [1] [2] When graphed in three dimensions (see ...
Both shots were over 340 miles (550 km), requiring large 120 ft (37 m) antennas and 50 kW transmitters. Both sites were demolished before 1987. In addition to the Aleutian Island extension, Project Bluegrass also included a 50 kW shot from Fort Yukon to Barter Island to connect the northern DEW line to the White Alice system.
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