Optimal transmit spectra for communication in the presence of crosstalk

Rohit V. Gaikwad, Richard G. Baraniuk

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations


We present a general framework for designing optimal transmit spectra for symmetric bit-rate communication services dominated by crosstalk, in particular Digital Subscriber Line (DSL) services such as the proposed HDSL2. Using the channel, noise, and interference transfer functions, we set up and solve an optimization problem to maximize the joint capacity of neighboring lines. Joint signaling techniques and optimal power distribution yield significant gains in bit rates (or performance margins) over current schemes. Furthermore, by design, the spectra are spectrally compatible with existing neighboring services. The framework is quite general -it does not depend on the exact choice of modulation scheme, for example. It is also extremely simple and of low computational complexity.

Original languageEnglish (US)
Title of host publication1999 IEEE Communications Theory Mini-Conference - Conference Record
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages5
ISBN (Electronic)0780356535, 9780780356535
StatePublished - Jun 1999
Event8th IEEE Communications Theory Mini-Conference - Vancouver, Canada
Duration: Jun 6 1999Jun 10 1999

Publication series

Name1999 IEEE Communications Theory Mini-Conference - Conference Record


Conference8th IEEE Communications Theory Mini-Conference


  • Capacity
  • Digital Subscriber Line (xDSL) systems
  • Multiuser interference

ASJC Scopus subject areas

  • Signal Processing
  • Computer Networks and Communications


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