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PSD-constrained PAR reduction for DMT/OFDM

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Author

Summary, in English

Common to all DMT/OFDM systems is a large peak-to-average ratio (PAR), which can lead to low power efficiency and nonlinear distortion. Tone reservation uses unused or reserved tones to design a peak-canceling signal to lower the PAR of a transmit block. In DMT ADSL systems, the power allocated to these tones may be limited due to crosstalk issues with many users in one twisted pair bundle. This PSD limitation not only limits PAR reduction ability, but also makes the optimization problem more challenging to solve. Extending the recently proposed active set tone reservation method, we develop an efficient algorithm with performance close to the optimal solution.

Publishing year

2004

Language

English

Publication/Series

Eurasip Journal on Applied Signal Processing

Volume

2004

Issue

10

Document type

Journal article

Publisher

Hindawi Limited

Topic

  • Electrical Engineering, Electronic Engineering, Information Engineering

Keywords

  • DMT
  • peak-to-average ratio
  • tone reservation
  • OFDM

Status

Published

ISBN/ISSN/Other

  • ISSN: 1110-8657