Multipath Propagation in Wired Media
Multipath propagation may also happen in wired media, especially in cases in which impedance mismatches cause signal reflections. A well-known example is power line communication.
High-speed power line communication systems usually employ multi-carrier modulations (such as OFDM or Wavelet OFDM) to avoid the intersymbol interference that multipath propagation would cause.
The ITU-T G.hn standard provides a way to create a high-speed (up to 1 Gigabit/s) local area network using existing home wiring (power lines, phone lines and coaxial cables). G.hn uses OFDM with a cyclic prefix to avoid ISI. Because multipath propagation behaves differently in each kind of wire, G.hn uses different OFDM parameters (OFDM symbol duration, Guard Interval duration) for each media.
Read more about this topic: Multipath Propagation
Famous quotes containing the words wired and/or media:
“And these poor nerves so wired to the skull
Ache on the lovelorn paper....”
—Dylan Thomas (1914–1953)
“Few white citizens are acquainted with blacks other than those projected by the media and the so—called educational system, which is nothing more than a system of rewards and punishments based upon one’s ability to pledge loyalty oaths to Anglo culture. The media and the “educational system” are the prime sources of racism in the United States.”
—Ishmael Reed (b. 1938)