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Dynamic Spectrum Management (DSM) is an important technique for mitigating crosstalk noise in multi-user Digital Subscriber Line (DSL) environments. Until now, most of the proposed algorithms for DSM have been designed solely for the purpose of bit-rate maximization. These algorithms assume a fixed maximum total power and neglect the energy consumption in DSL modems. However, since recently there is a strong interest in the DSL field to reduce energy consumption as shown, e.g., by the European Commissions' code of conduct on energy consumption of broadband equipment. In contrast to traditional DSM, this paper will show how DSM can be used for minimizing the energy consumption.
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