Wireless_communications Wireless_communications 4INFO ** is an SMS and mobile search engine that works with on most major US wireless carriers. It launched a private release on December 1, 2004, and it was publicly released on February 1, 2005. ...more on Wikipedia about "4INFO"
Free-To-Air is a term regarding transmission of unencrypted (or "unscrambled") television and radio over satellite. The term is often used with digital satellite receivers ("FTA Satellite" receivers) intended to receive unencrypted DVB-S (Digital Video Broadcasting--Satellite) programming. To receive FTA channels, you will require the following: ...more on Wikipedia about "Free-To-Air"
In mathematics, a Golomb ruler, named after Solomon W. Golomb, is a set of marks at integer positions along an imaginary ruler such that no two pairs of marks are the same distance apart. The number of marks on the ruler is its order, and the largest distance between two of its marks is its length. Translation and reflection of a Golomb ruler are considered trivial, so the smallest mark is customarily put at 0 and the next mark at the smaller of its two possible values. ...more on Wikipedia about "Golomb ruler"
A horn antenna is used for the transmission and reception of microwave signals. It derives its name from the characteristic flared appearance. The flared portion can be square, rectangular, or conical. The maximum radiation and response corresponds with the axis of the horn. In this respect, the antenna resembles an acoustic horn. It is usually fed with a waveguide. ...more on Wikipedia about "Horn antenna"
MagCom was a manufacturer of cellular GSM handsets, located in Oslo, Norway. ...more on Wikipedia about "MagCom"
Microwave radio relay is a technology for transmitting digital and analog signals, such as long-distance telephone calls and the relay of television programs to transmitters, between two locations on a line of sight radio path. In microwave radio relay, radio waves are transmitted between the two locations with directional antennas, forming a fixed radio connection between the two points. ...more on Wikipedia about "Microwave radio relay"
The near-far problem is a situation that is common in wireless communication systems (in particular, CDMA). ...more on Wikipedia about "Near-far problem"
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The Open System Architecture (OSA) is part of the 3rd generation mobile telecommunications network or UMTS. OSA describes how services are architected in an UMTS network. ...more on Wikipedia about "Open Services Architecture"
Point-to-multipoint (PT2MP) telecommunications is most typically ( 2003) used in wireless Internet and IP Telephony via gigahertz radio frequencies. ...more on Wikipedia about "Point-to-multipoint"
In telecommunication, slant range is the line-of-sight distance between two points, not at the same level relative to a specific datum. An example of slant range is the distance to an airborne radar target, e.g., an airplane flying at high altitude with respect to that of the radar antenna. The slant range is the hypotenuse of the triangle represented by the altitude of the airplane and the distance between the radar antenna and the airplane's ground track (the point on the Earth at which it is directly overhead). In the absence of altitude information, the aircraft location would be plotted farther from the antenna than its actual ground track. ...more on Wikipedia about "Slant range"
A spot beam, in telecommunications parlance, is a satellite signal that is specially concentrated in power so that it will cover only a limited geographic area. Spot beams are used so that only earth stations in a particular intended reception area can properly receive the satellite signal. ...more on Wikipedia about "Spot beam"
A Yagi-Uda Antenna, commonly known simply as a Yagi antenna or Yagi, is an antenna consisting of an array of a dipole and additional parasitic elements. The dipole in the array is driven, and another element, slightly longer, operates as a reflector. Other shorter parasitic elements can be added in front of the dipole as directors. This arrangement gives the antenna directionality that a single dipole lacks. Yagis are directional along the axis perpendicular to the dipole in the plane of the elements, from the reflector through the driven element and out the director(s); if one holds out one's arms to form a dipole and has the reflector behind oneself, one would receive signals with maximum gain from in front of oneself. ...more on Wikipedia about "Yagi antenna"
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