Vectored-DMT: a FEXT canceling modulation scheme for coordinating users
نویسندگان
چکیده
This paper describes a modulation scheme achieving FarEnd Crosstalk (FEXT) cancellation, assuming that joint signal processing among the users can be performed at either the receiver or at the transmitter side. The multi-user channel is modeled as a Multiple-Input-MultipleOutput (MIMO) system, and the development starts with the zero-forcing Generalized Decision Feedback Equalizer (GDFE) ([1]). Structures are derived, which combine the Discrete Multi-Tone (DMT) transmission technique ([2]) with either successive cancellation at the receiver or precoding at the transmitter. A promising application of the proposed scheme is in FEXT-limited Digital Subscriber Line (DSL) systems. Computer simulations demonstrate that significant performance improvements can be realized in such scenarios.
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