Title :
A hybrid time divisioning scheme for power allocation in DMT-based DSL systems
Author :
Garg, Akshay ; Chaturvedi, A.K.
Author_Institution :
Laxmi Niwas Mittal Inst. of Inf. Technol., Jaipur
Abstract :
We propose an iterative waterfilling based multiuser Hybrid Time Divisioning (HTD) scheme for power allocation in DMT based DSL systems. The problem of finding the (user,subchannel) pairs which should transmit alone and the pairs which should transmit along with other users, so as to result in the maximum aggregate data rate achievable using time divisioning, has been considered. The proposed scheme Is a low complexity, sub-optimal solution to this problem. Results show that the HTD scheme can achieve better data rates than Iterative Waterfilling a well as Multiuser Discrete Bit Loading scheme (for high coupling coefficient values) with comparatively lesser complexity
Keywords :
digital subscriber lines; iterative methods; DMT; DSL system; HTD; digital subscriber line; dynamic spectrum management; hybrid time divisioning scheme; iterative waterfilling; maximum aggregate data rate; multiuser discrete bit loading scheme; power allocation; suboptimal solution; Aggregates; Crosstalk; DSL; Electromagnetic coupling; Interference channels; Iterative algorithms; OFDM modulation; Power system modeling; Radio spectrum management; Signal to noise ratio;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2006.02016.
