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  2. Distributed antenna system - Wikipedia

    en.wikipedia.org/wiki/Distributed_antenna_system

    The RF node with three antennas was at the platform and another antenna near the stairs on the far side. A distributed antenna system ( DAS ) is a network of spatially separated antenna nodes connected to a common source via a transport medium that provides wireless service within a geographic area or structure.

  3. Coverage map - Wikipedia

    en.wikipedia.org/wiki/Coverage_map

    A coverage map may be produced to indicate the area in which a certain signal strength is delivered. [1] Even if it is 100% accurate (which it never is), a major factor on whether a signal is receivable depends very much on whether the receiving apparatus is sensitive enough to use a signal of that level.

  4. Height above average terrain - Wikipedia

    en.wikipedia.org/wiki/Height_above_average_terrain

    The altitude of the antenna site, minus the average altitude of all the specified points, is the HAAT. This can create some unusual cases, particularly in mountainous regions—it is possible to have a negative number for HAAT (the transmitter would not be located underground, but rather in a valley , with hills on both sides taller than the ...

  5. Smart antenna - Wikipedia

    en.wikipedia.org/wiki/Smart_antenna

    Smart antennas (also known as adaptive array antennas, digital antenna arrays, multiple antennas and, recently, MIMO) are antenna arrays with smart signal processing algorithms used to identify spatial signal signatures such as the direction of arrival (DOA) of the signal, and use them to calculate beamforming vectors which are used to track and locate the antenna beam on the mobile/target.

  6. Propagation graph - Wikipedia

    en.wikipedia.org/wiki/Propagation_graph

    A propagation graph is a signal flow graph in which vertices represent transmitters, receivers or scatterers. Edges in the graph model propagation conditions between vertices. Propagation graph models were initially developed by Troels Pedersen, et al. for multipath propagation in scenarios with multiple scattering, such as indoor radio ...

  7. List of digital television deployments by country - Wikipedia

    en.wikipedia.org/wiki/List_of_digital_television...

    Map of digital terrestrial television broadcasting systems by country. This is a list of digital television deployments by country, which summarises the process and progress of transition from analogue to digital broadcasting. The transition to digital television is a process that is happening at different paces around the world.

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  9. TV and FM DX - Wikipedia

    en.wikipedia.org/wiki/TV_and_FM_DX

    Digital radio and digital television can also be received; however, there is much greater difficulty with reception of weak signals due to the cliff effect, particularly with the ATSC TV standard mandated in the U.S. However, when the signal is strong enough to be decoded identification is much easier than with analog TV as the picture is ...

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