multipath reception meaning
[Electronics]
Reception of a signal over more than one path. This often results in fading (see MULTIPATH FADING) and other undesirable effects, such as ghosting in television reception.
Reception of a signal over more than one path. This often results in fading (see MULTIPATH FADING) and other undesirable effects, such as ghosting in television reception.
Examples
- Some multipath reception is momentary due to road vehicles or aircraft passing; other multiplath problems may persist due to reflection off tall buildings or other landscape features.
- The New York market is uniquely problematic for multipath reception due to the large number of man-made obstacles which prevent adequate digital coverage of the entire city from the main broadcast facilities atop the Empire State Building . ( The proposed 1776-foot 2009 US DTV transition has already been completed .)
- In the case of analogue television waveforms, for example, the picture content also has a bearing on the acceptable levels of system distortion . ( With TV pictures, phase ripple will give effects similar to ghosting or multipath reception, where low level multiple images are superimposed on the main picture.
- Proponents of COFDM argue that it resists multipath far better than 8VSB . This is important property of the modulation for receiving HDTV in e . g . moving vehicles that is not possible with 8VSB . Early 8VSB MPH . The deficiencies in 8VSB in regards to multipath reception can be dealt with by using additional forward error-correcting codes which decreases the useful bit rate, such as that used by ATSC-M / H for Mobile / Handheld reception.
