Optimal multiuser spectrum balancing for digital subscriber lines
Optimal multiuser spectrum balancing for digital subscriber lines
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DOI：
10.1109/tcomm.2006.873096
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发表时间：
2006-05
影响因子：
8.3
通讯作者：
R. Cendrillon;Wei Yu;M. Moonen;Jan Verlinden;T. Bostoen
中科院分区：
文献类型：
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作者：
R. Cendrillon;Wei Yu;M. Moonen;Jan Verlinden;T. Bostoen
串扰是诸如ADSL和VDSL的现代数字用户线（DSL）系统中的主要问题。作为确保频谱兼容性的传统方式的静态频谱管理采用可能过于保守并导致性能差的频谱掩码。本文提出了一种集中式的DSL频谱均衡优化算法。该算法使用对偶分解方法，以一种高效和计算上易于处理的方式优化光谱。该算法表现出显着的性能增益超过现有的动态频谱管理（DSM）技术，例如，在所研究的情况之一中，所提出的集中式算法导致数据速率比分布式DSM算法迭代注水增加四倍。
Crosstalk is a major issue in modern digital subscriber line (DSL) systems such as ADSL and VDSL. Static spectrum management, which is the traditional way of ensuring spectral compatibility, employs spectral masks that can be overly conservative and lead to poor performance. This paper presents a centralized algorithm for optimal spectrum balancing in DSL. The algorithm uses the dual decomposition method to optimize spectra in an efficient and computationally tractable way. The algorithm shows significant performance gains over existing dynamics spectrum management (DSM) techniques, e.g., in one of the cases studied, the proposed centralized algorithm leads to a factor-of-four increase in data rate over the distributed DSM algorithm iterative waterfilling.