Near line of sight propagation(ppt)
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projectsofme
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24-09-2010, 03:56 PM



.ppt   Near line of sight propagation.ppt (Size: 2.8 MB / Downloads: 71)
ABSTRACT



Non-line-of-sight (NLOS) or near-line-of-sight is a term used to describe radio transmission across a path that is partially obstructed, usually by a physical object in the Fresnel zone.This Technology Overview provides a high-level introduction to the NLOS features available in Tsunami Multipoint Ethernet Systems. These features enable service coverage in some NLOS
environments by combining an adaptive equalizer with high-gain directional antennas to neutralize the effects of multipath interference. Tsunami Multipoint is not designed to operate in non line of sight conditions.

Multipath Interference

When an RF wave bounces off a tall object (such as a building) or a low object (such as a lake or pavement) as it
travels between two points, a duplicate of the original signal is generated. The distance traveled by the two
signals is different, causing them to arrive at their destination at different times. This time differential causes the
signals to overlap and merge into a single distorted signal at the receiving end. The interaction between direct
signals and duplicate reflected images causes multipath interference.

hope this article will useful to you!!!!
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