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A Modified Low Complexity Based Distributed Iterative Water-Filling (IWF) Spectrum Management Algorithm

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Abstract

In digital subscriber line (DSL) system, crosstalk created by electromagnetic interference among twisted pairs degrades the system performance. Very high bit rate DSL (VDSL), utilizes higher bandwidth of copper cable for data transmission. In upstream data transmission, a ‘Near–Far’ problem occurs in VDSL system. In this problem the far end crosstalk is produced from near end user degrades the data rate achieved at the far end user. Several dynamic spectrum management (DSM) algorithms were proposed in literature to remove this problem. In this paper, a new distributed DSM algorithm is proposed in which power from only those subcarriers of near end user are reduced which create interference to far end user. This power back off strategy takes place with the help of power spectral density masks at those interference creating subcarriers of near end user. The results after simulating the low complex proposed algorithm show an improvement in terms of data rate and approaches near the rate of highly complex optimal spectrum balancing algorithm.

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Authors and Affiliations

  1. ECE Department, NIT, Kurukshetra, Haryana, India

    Sunil Sharma & O. P. Sahu

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  1. Sunil Sharma
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  2. O. P. Sahu
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Correspondence to Sunil Sharma.

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Sharma, S., Sahu, O.P. A Modified Low Complexity Based Distributed Iterative Water-Filling (IWF) Spectrum Management Algorithm. Wireless Pers Commun 82, 1239–1247 (2015). https://doi.org/10.1007/s11277-015-2278-5

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  • DOI: https://doi.org/10.1007/s11277-015-2278-5

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