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Definition of "Multipath" |
In radio transmission, multipath refers to the simultaneous reception of two copies of the signal, that arrive via separate paths with different delays. A common example is when a signal bounces off a building or other object and is received along with the direct (unbounced) signal. In television reception, this causes "ghosting" -- one sees a faded echo on the screen horizontally displaced from the main image. Another common example is in radio (especially AM radio), where the signal bounces off the ionosphere and one receives that delayed signal along with the directly transmitted signal. / The multiple paths a radio wave may follow between transmitter and receiver. The propagation phenomenon that results in radio signals reaching the receiving antenna by two or more paths. See the Multipath graphic part of the Antenna Dictionary. / (1) propagation of electromagnetic waves along various paths from the transmitter to the receiver. |
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