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Line of sight (LoS) propagation from an antenna. Line-of-sight propagation is a characteristic of electromagnetic radiation or acoustic wave propagation which means waves can only travel in a direct visual path from the source to the receiver without obstacles. [1] Electromagnetic transmission includes light emissions traveling in a straight line.
Line-of-sight propagation, electro-magnetic waves travelling in a straight line Non-line-of-sight propagation; Line-of-sight fire, shooting directly at a visible target on a relatively flat trajectory; Line-of-sight velocity, an object's speed straight towards or away from an observer; Line-of-sight double star, one in which two stars are only ...
A propagation graph is a simple directed graph = (,) with vertex set and edge set .. The vertices models objects in the propagation scenario. The vertex set is split into three disjoint sets as = where is the set of transmitters, is the set of receivers and is the set of objects named "scatterers".
The minimum required resolution according to Johnson's criteria are expressed in terms of line pairs of image resolution across a target, in terms of several tasks: [3] Detection, an object is present (1.0 +/− 0.25 line pairs) Orientation, symmetrical, asymmetric, horizontal, or vertical (1.4 +/− 0.35 line pairs)
A2G channels are notably characterized by a high probability of line-of-sight (LOS) propagation, a critical factor for higher frequency transmissions like mmWaves and THz. This feature leads to enhanced reliability of links and a reduction in the necessary transmission power to meet the desired link budget.
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The Egli model is a terrain model for radio frequency propagation.This model, which was first introduced by John Egli in his 1957 paper, [1] was derived from real-world data on UHF and VHF television transmissions in several large cities.
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