Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/Non-line-of-sight_propagation> ?p ?o }
- Non-line-of-sight_propagation abstract "Non-line-of-sight (NLOS) or near-line-of-sight is radio transmission across a path that is partially obstructed, usually by a physical object in the innermost Fresnel zone.Many types of radio transmissions depend, to varying degrees, on line of sight (LOS) between the transmitter and receiver. Obstacles that commonly cause NLOS conditions include buildings, trees, hills, mountains, and, in some cases, high voltage electric power lines. Some of these obstructions reflect certain radio frequencies, while some simply absorb or garble the signals; but, in either case, they limit the use of many types of radio transmissions, especially when low on power budget.Lower power levels at receiver give less space for correctly picking the transmission. Low levels can be caused by at least three basic reasons: low transmit level, for example Wi-Fi power levels; far-away transmitter, such as 3G more than 5 miles (8.0 km) away or TV more than 31 miles (50 km) away; and obstruction between the transmitter and the receiver, leaving no good path.NLOS lowers the effective received power. Near Line Of Sight can usually be dealt with better antennas, but Non Line Of Sight is usually dealt with alternative paths or multipath propagation methods.How to achieve effective NLOS networking has become one of the major questions of modern computer networking. Currently, the most common method for dealing with NLOS conditions on wireless computer networks is simply to circumvent the NLOS condition and place relays at additional locations, sending the content of the radio transmission around the obstructions. Some more advanced NLOS transmission schemes now use multipath signal propagation, bouncing the radio signal off other nearby objects to get to the receiver.Non-Line-of-Sight (NLOS) is a term often used in radio communications to describe a radio channel or link where there is no visual line of sight (LOS) between the transmitting antenna and the receiving antenna. In this context LOS is taken Either as a straight line free of any form of visual obstruction, even if it is actually too distant to see with the unaided human eye As a virtual LOS i.e., as a straight line through visually obstructing material, thus leaving sufficient transmission for radio waves to be detectedThere are many electrical characteristics of the transmission media that affect the radio wave propagation and therefore the quality of operation of a radio channel, if it is possible at all, over an NLOS path.The acronym NLOS has become more popular in the context of wireless local area networks (WLANs) and wireless metropolitan area networks such as WiMAX because the capability of such links to provide a reasonable level of NLOS coverage greatly improves their marketability and versatility in the typical urban environments where they are most frequently used. However NLOS contains many other subsets of radio communications.The influence of a visual obstruction on a NLOS link may be anything from negligible to complete suppression. An example might apply to a LOS path between a television broadcast antenna and a roof mounted receiving antenna. If a cloud passed between the antennas the link could actually become NLOS but the quality of the radio channel could be virtually unaffected. If, instead, a large building was constructed in the path making it NLOS, the channel may be impossible to receive.Beyond Line-Of-Sight (BLOS) is a related term often used in the military to describe radio communications capabilities that link personnel or systems too distant or too fully obscured by terrain for LOS communications. These radios utilize active repeaters, groundwave propagation, tropospheric scatter links, and ionospheric propagation to extend communication ranges from a few miles to a few thousand miles.".
- Non-line-of-sight_propagation wikiPageExternalLink 23.
- Non-line-of-sight_propagation wikiPageID "2175469".
- Non-line-of-sight_propagation wikiPageLength "29209".
- Non-line-of-sight_propagation wikiPageOutDegree "124".
- Non-line-of-sight_propagation wikiPageRevisionID "704946603".
- Non-line-of-sight_propagation wikiPageWikiLink 3G.
- Non-line-of-sight_propagation wikiPageWikiLink Absorption_(electromagnetic_radiation).
- Non-line-of-sight_propagation wikiPageWikiLink Altitude.
- Non-line-of-sight_propagation wikiPageWikiLink Amateur_radio.
- Non-line-of-sight_propagation wikiPageWikiLink Amplifier.
- Non-line-of-sight_propagation wikiPageWikiLink Analogy.
- Non-line-of-sight_propagation wikiPageWikiLink Angular_frequency.
- Non-line-of-sight_propagation wikiPageWikiLink Antenna_(radio).
- Non-line-of-sight_propagation wikiPageWikiLink Atmosphere.
- Non-line-of-sight_propagation wikiPageWikiLink Atmospheric_duct.
- Non-line-of-sight_propagation wikiPageWikiLink Category:Radio_frequency_propagation.
- Non-line-of-sight_propagation wikiPageWikiLink Characteristic_impedance.
- Non-line-of-sight_propagation wikiPageWikiLink Communications_satellite.
- Non-line-of-sight_propagation wikiPageWikiLink Concrete.
- Non-line-of-sight_propagation wikiPageWikiLink Day.
- Non-line-of-sight_propagation wikiPageWikiLink Density.
- Non-line-of-sight_propagation wikiPageWikiLink Diffraction.
- Non-line-of-sight_propagation wikiPageWikiLink Duplex_(telecommunications).
- Non-line-of-sight_propagation wikiPageWikiLink Earth.
- Non-line-of-sight_propagation wikiPageWikiLink Electric_field.
- Non-line-of-sight_propagation wikiPageWikiLink Electric_power.
- Non-line-of-sight_propagation wikiPageWikiLink Electrical_conductor.
- Non-line-of-sight_propagation wikiPageWikiLink Electrical_resistivity_and_conductivity.
- Non-line-of-sight_propagation wikiPageWikiLink Equator.
- Non-line-of-sight_propagation wikiPageWikiLink FM_broadcasting.
- Non-line-of-sight_propagation wikiPageWikiLink Farad.
- Non-line-of-sight_propagation wikiPageWikiLink Feedback.
- Non-line-of-sight_propagation wikiPageWikiLink Fresnel_zone.
- Non-line-of-sight_propagation wikiPageWikiLink Geosynchronous_orbit.
- Non-line-of-sight_propagation wikiPageWikiLink Hertz.
- Non-line-of-sight_propagation wikiPageWikiLink High_frequency.
- Non-line-of-sight_propagation wikiPageWikiLink Homogeneity_(physics).
- Non-line-of-sight_propagation wikiPageWikiLink Hot_air_balloon.
- Non-line-of-sight_propagation wikiPageWikiLink Human_eye.
- Non-line-of-sight_propagation wikiPageWikiLink Iceberg.
- Non-line-of-sight_propagation wikiPageWikiLink Insulator_(electricity).
- Non-line-of-sight_propagation wikiPageWikiLink Inverse-square_law.
- Non-line-of-sight_propagation wikiPageWikiLink Inversion_(meteorology).
- Non-line-of-sight_propagation wikiPageWikiLink Ion.
- Non-line-of-sight_propagation wikiPageWikiLink Ionosphere.
- Non-line-of-sight_propagation wikiPageWikiLink Ionospheric_reflection.
- Non-line-of-sight_propagation wikiPageWikiLink Joseph_von_Fraunhofer.
- Non-line-of-sight_propagation wikiPageWikiLink Kilometre.
- Non-line-of-sight_propagation wikiPageWikiLink Line-of-sight_propagation.
- Non-line-of-sight_propagation wikiPageWikiLink Longwave.
- Non-line-of-sight_propagation wikiPageWikiLink Low_frequency.
- Non-line-of-sight_propagation wikiPageWikiLink Magnetic_field.
- Non-line-of-sight_propagation wikiPageWikiLink Marconi_Company.
- Non-line-of-sight_propagation wikiPageWikiLink Maxwells_equations.
- Non-line-of-sight_propagation wikiPageWikiLink Metal.
- Non-line-of-sight_propagation wikiPageWikiLink Meteorology.
- Non-line-of-sight_propagation wikiPageWikiLink Microwave_transmission.
- Non-line-of-sight_propagation wikiPageWikiLink Millimetre.
- Non-line-of-sight_propagation wikiPageWikiLink Mobile_phone.
- Non-line-of-sight_propagation wikiPageWikiLink Molecule.
- Non-line-of-sight_propagation wikiPageWikiLink Multipath_propagation.
- Non-line-of-sight_propagation wikiPageWikiLink Nanometre.
- Non-line-of-sight_propagation wikiPageWikiLink Near_and_far_field.
- Non-line-of-sight_propagation wikiPageWikiLink Non-line-of-sight_propagation.
- Non-line-of-sight_propagation wikiPageWikiLink Nyquist–Shannon_sampling_theorem.
- Non-line-of-sight_propagation wikiPageWikiLink Passive_repeater.
- Non-line-of-sight_propagation wikiPageWikiLink Permittivity.
- Non-line-of-sight_propagation wikiPageWikiLink Perpendicular.
- Non-line-of-sight_propagation wikiPageWikiLink Plane_wave.
- Non-line-of-sight_propagation wikiPageWikiLink Plasma_(physics).
- Non-line-of-sight_propagation wikiPageWikiLink Poynting_vector.
- Non-line-of-sight_propagation wikiPageWikiLink Radian.
- Non-line-of-sight_propagation wikiPageWikiLink Radio.
- Non-line-of-sight_propagation wikiPageWikiLink Radio_receiver.
- Non-line-of-sight_propagation wikiPageWikiLink Radio_relay.
- Non-line-of-sight_propagation wikiPageWikiLink Rayleigh_fading.
- Non-line-of-sight_propagation wikiPageWikiLink Reciprocity_(electromagnetism).
- Non-line-of-sight_propagation wikiPageWikiLink Reflection_coefficient.
- Non-line-of-sight_propagation wikiPageWikiLink Reinforced_concrete.
- Non-line-of-sight_propagation wikiPageWikiLink Relative_permittivity.
- Non-line-of-sight_propagation wikiPageWikiLink Rule_of_thumb.
- Non-line-of-sight_propagation wikiPageWikiLink Rural_area.
- Non-line-of-sight_propagation wikiPageWikiLink Season.
- Non-line-of-sight_propagation wikiPageWikiLink Siemens_(unit).
- Non-line-of-sight_propagation wikiPageWikiLink Simplex_communication.
- Non-line-of-sight_propagation wikiPageWikiLink Snells_law.
- Non-line-of-sight_propagation wikiPageWikiLink Statisics.
- Non-line-of-sight_propagation wikiPageWikiLink Steel.
- Non-line-of-sight_propagation wikiPageWikiLink Sun.
- Non-line-of-sight_propagation wikiPageWikiLink Sunspot.
- Non-line-of-sight_propagation wikiPageWikiLink Television_station.
- Non-line-of-sight_propagation wikiPageWikiLink Temperate_climate.
- Non-line-of-sight_propagation wikiPageWikiLink Time_of_arrival.
- Non-line-of-sight_propagation wikiPageWikiLink Trajectory.
- Non-line-of-sight_propagation wikiPageWikiLink Transmission_line_theory.
- Non-line-of-sight_propagation wikiPageWikiLink Transmission_tower.
- Non-line-of-sight_propagation wikiPageWikiLink Transmitter.
- Non-line-of-sight_propagation wikiPageWikiLink Tropics.
- Non-line-of-sight_propagation wikiPageWikiLink Troposphere.