PSD-Constrained PAR Reduction for DMT/OFDM

PSD-Constrained PAR Reduction for DMT/OFDM

<p/> <p>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...

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Bibliographic Details
Main Authors: Krongold Brian S, Johansson Albin, Andgart Niklas, &#214;dling Per, B&#246;rjesson Per Ola
Format: Article
Language:English
Published: SpringerOpen 2004-01-01
Series:EURASIP Journal on Advances in Signal Processing
Subjects:
peak-to-average ratio
tone reservation
OFDM
DMT
Online Access:http://dx.doi.org/10.1155/S1110865704403187
Description
Summary:<p/> <p>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.</p>
ISSN:1687-6172
1687-6180

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