面向动态频谱管理的多级注水算法  

MULTI-LEVEL WATER FILLING ALGORITHM FOR DYNAMIC SPECTRUM MANAGEMENT

作　　者：郭航舵[1] 王勇[1,2] 陶晓玲[3] 周洁[1] 

机构地区：[1]桂林电子科技大学计算机科学与工程学院,广西桂林541004 [2]桂林电子科技大学CSIP广西分中心,广西桂林541004 [3]桂林电子科技大学信息与通信学院,广西桂林541004

出　　处：《计算机应用与软件》2014年第6期91-94,共4页Computer Applications and Software

基　　金：国家自然科学基金项目(61163058)

摘　　要：针对数字用户线路DSL(digital subscriber line)网络中存在串扰的问题,提出一种面向动态频谱管理的多级注水算法。该算法首先使用迭代梯度下降原理,将信号频谱划分为多个频带;然后,利用注水原理计算功率谱密度;最后,将近端用户承载比特从高干扰频带转移至低干扰频带。实验表明,多级注水算法复杂度低,收敛迅速,在ADSL2+和VDSL2场景中均能发挥出理想的串扰抑制效果。To solve the problem of crosstalk in digital subscriber line （DSL） networks, we propose a multi-level water filling algorithm which is the dynamic spectrum management oriented. The algorithm first divides the signal spectrum into multiple frequency bands using iterative gradient descent principle; then employs water filling principle to compute power spectrum density, and finally moves the bits borne by the near-end users from high interference bands to low interference bands. Experiments show that the multi-level water filling algorithm has less computational complexity and much faster convergence speed, and plays an ideal effect of crosstalk limitation in both ADSL2 ＋ and VDSL2 scenarios.

关 键 词：数字用户线路 串扰抑制 动态频谱管理 功率谱密度 多级注水算法 

分 类 号：TN915.61[电子电信—通信与信息系统] TP393[电子电信—信息与通信工程]