Title :
Optimal multiuser spectrum balancing for digital subscriber lines
Author :
Cendrillon, Raphael ; Yu, Wei ; Moonen, Marc ; Verlinden, Jan ; Bostoen, Tom
Author_Institution :
Sch. of Inf. Technol. & Electr. Eng., Queensland Univ. of Technol., Australia
fDate :
5/1/2006 12:00:00 AM
Abstract :
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.
Keywords :
crosstalk; digital subscriber lines; frequency allocation; iterative methods; DSL; crosstalk; digital subscriber lines; dynamic spectrum management; iterative waterfilling; optimum multiuser spectrum balancing; static spectrum management; Background noise; Crosstalk; DSL; Information technology; Interference channels; Iterative algorithms; Modems; Optimization methods; Performance gain; Radio spectrum management; Digital subscriber line (DSL); dual decomposition; dynamic spectrum management (DSM); interference channel; nonconvex optimization;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.2006.873096