Patent ID: 6804348
Filing Date: 2004-10-12
Classification: H04B,H04L

Abstract:
A circuit for representing a digital transmission on a two-way subscriber line carrying overlapping transmission and receive signals in time and frequency domains, the circuit comprising:an input for providing a representation of an outbound transmission signal that is substantially free of time and frequency overlaps with inbound receive signals from the subscriber line, and wherein transmission signal bandwidth is asymmetrical to receive signal bandwidth; a modeling section connected to the input, comprising a plurality of resistive elements and a plurality of capacitive elements, the resistive and capacitive elements being arranged for modeling a plurality of attributes of a subscriber line environment which transform transmission signals as they overlap with receive signals, the modeling section further being configured to substantially duplicate a transformation on the representation of the transmission signal; and an output connected to the modeling section for providing the transformed representation of the transmission signal.