Title :
Bandwidth-efficient digital transmission over unshielded twisted-pair wiring
Author :
Gi-Hong Im ; Werner, J.-J.
Author_Institution :
AT&T Bell Labs., Middletown, NJ
fDate :
12/1/1995 12:00:00 AM
Abstract :
Describes techniques for achieving data rates up to 155 Mb/s over unshielded twisted-pair (UTP) wiring for local area network (LAN) applications in premises distribution systems. Duplex operation at these high data rates is achieved over two pairs of UTP wiring and with a bandwidth utilization that is less than 30 MHz, thus avoiding potential problems with radiation limits. The transmission scheme used for these LAN applications is carrierless AM/PM (CAP), which is a bandwidth-efficient two-dimensional passband encoding scheme. The paper also discusses in some detail a technique called NEXT equalization, which allows several users to share the same cable
Keywords :
amplitude modulation; channel capacity; digital communication; equalisers; local area networks; modulation coding; multiplexing; phase modulation; subscriber loops; transceivers; twisted pair cables; 155 Mbit/s; 30 MHz; NEXT equalization; bandwidth utilization; bandwidth-efficient digital transmission; carrierless AM/PM; data rates; duplex operation; local area network applications; premises distribution systems; transmission scheme; two-dimensional passband encoding scheme; unshielded twisted-pair wiring; Bandwidth; Communication cables; Encoding; Local area networks; Passband; Power cables; Quadrature amplitude modulation; Spine; Transceivers; Wiring;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
