Propagation Mechanisms
Last updated
Last updated
Besides line of sight, signal can reach receiver in three other “indirect” ways.
Signal is reflected from a large object.
Signal is scattered by the edge of a large object - “bends”.
Signal is scattered by an object that is small relative to the wavelength.
Receiver receives multiple copies of the signal, each following a different path.
Copies can either strengthen or weaken each other.
Small changes in location can result in big changes in signal strength.
Difference in path length can cause intersymbol interference (ISI).
