A low-complexity lattice-based low-PAR transmission scheme for DSL channels

Iain B. Collings*, I. Vaughan L Clarkson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


This paper presents a new low-complexity multicarrier modulation (MCM) technique based on lattices which achieves a peak-to-average power ratio (PAR) as low as three. The scheme can be viewed as a "drop in" replacement for the discrete multitone (DMT) modulation of an asymmetric digital subscriber line modem. We show that the lattice-MCM retains many of the attractive features of sinusoidal-MCM, and does so with lower implementation complexity, O(N), compared with DMT, which requires O(N log N) operations. We also present techniques for narrowband interference rejection and power profiling. Simulation studies confirm that performance of the lattice-MCM is superior, even compared with recent techniques for PAR reduction in DMT.

Original languageEnglish
Pages (from-to)755-764
Number of pages10
JournalIEEE Transactions on Communications
Issue number5
Publication statusPublished - May 2004
Externally publishedYes


  • Digital subscriber line (DSL)
  • Lattice codes
  • Multicarrier modulation (MCM)
  • Peak-to-average ratio (PAR)


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