With respect to fixed wireless technology, line-of-sight refers to being able to see the signal transmission tower clearly from the location of your antenna, and is essential to successful reception and transmission of the high-speed signal. Successful wireless transmission from distribution tower to antenna typically ranges up to 5 km.
A straight path between a transmitting and receiving antenna that's unobstructed by intermediate topography. RF telemetry systems require line-of-sight transmissions. The use of repeater stations can overcome line-of-sight interruptions.
Range refers to the ideal broadcast range of wireless audio/video link (transmitter and receiver) systems. Line-of-sight means the range when there is a visible pathway between the transmitter antenna and the receiver antenna. As well, the line-of-sight specification indicates performance under absolute best conditions. Please be aware that just like home cordless telephones, TV reception, and cellular phone reception, wireless audio/video equipment can often be less than perfect! All wireless products are subject to limitations and vulnerabilities due to many potential variables.
In order for the GPS receiver to receive signals from the satellites, it must have an unobstructed view to them. Objects such as tall buildings and bridges can block the line-of-sight needed by the receiver to obtain a position solution. [Chapter 5
Line-of-sight means more than being able to see the receiving antenna from the transmitting antenna. In order to have true line-of-sight, no objects (including trees, houses or the ground) can be in the Fresnel zone.
The presence of an unobstructed visual path with a clear Fresnel zone between two wireless devices. Both a visual path and a clear Fresnel zone are needed to have a clear wireless line-of-sight path.
When the transmit and receive antennas can physically see each other.
A signal path uninhibited by physical objects in the intervening terrain. The ultimate limitation of line-of-sight is the curvature of the earth.
When two objects (such as a satellite and a receiving station) have nothing in between them, then they are in "line-of-sight" of each other. When a satellite is on the other side of the Earth from a receiving station, the Earth is in between them, so the satellite and the receiving station are not in "line-of sight" of each other. (Related words: visibility, data reception)
Unencumbered sight line between a potential firing point for standoff weapons and a potential target.
Wireless communication that requires a clear, straight line from the transmitter to the receiver with no objects in between (typical characteristic of Infra-Red technology).