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Bandwidth-efficient digital transmission over unshielded twisted-pair wiring

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2 Author(s)
Gi-Hong Im ; AT&T Bell Labs., Middletown, NJ ; Werner, J.-J.

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

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Selected Areas in Communications, IEEE Journal on  (Volume:13 ,  Issue: 9 )