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الرئيسية > A Low Complexity Based Spectru...>الوصف

A Low Complexity Based Spectrum Management Algorithm for Near Far Problem in VDSL Environment

المصدر: مجلة جامعة الملك سعود - علوم الحاسب والمعلومات
الناشر: جامعة الملك سعود
المؤلف الرئيسي: Sharma, Sunil (Author)
مؤلفين آخرين: Sahu, O. P. (Co-Author)
المجلد/العدد: مج27, ع4
محكمة: نعم
الدولة: السعودية
التاريخ الميلادي: 2015
الصفحات: 460 - 436
DOI: 10.33948/0584-027-004-007
ISSN: 1319-1578
رقم MD: 973734
نوع المحتوى: بحوث ومقالات
اللغة: الإنجليزية
قواعد المعلومات: science
مواضيع:
علوم الحاسوب | الخوارزميات
كلمات المؤلف المفتاحية:
Digital Subscriber Line | Discrete Multi Tone | Iterative Water Filling | Optimal Spectrum Balancing | Dynamic Spectrum Management
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المستخلص: 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. During upstream transmission, a ‘Near– Far’ problem occurs in VDSL system. In this problem the far end crosstalk (FEXT) is produced from near end user degrades the data rate achieved at the far end user. The effect of FEXT can be reduced by properly managing power spectral densities (PSD) of transmitters of near and far users. This kind of power allocation is called dynamic spectrum management (DSM). In this paper, a new distributed DSM algorithm is proposed in which power from only those sub channels 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 (PSD) masks at interference creating sub channels of near end user. The simulation results of the proposed algorithm show an improvement in terms of data rate and approaches near to that of optimal spectrum balancing (OSB) algorithm.
ISSN: 1319-1578

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