Distributed multiuser power control for digital subscriber lines
Distributed multiuser power control for digital subscriber lines
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DOI：
10.1109/jsac.2002.1007390
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发表时间：
2002-08
期刊：
影响因子：
--
通讯作者：
Wei Yu;G. Ginis;J. Cioffi
中科院分区：
文献类型：
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作者：
Wei Yu;G. Ginis;J. Cioffi
研究了频率选择性干扰信道中的多用户功率控制问题。干扰信道被建模为一个非合作博弈，并建立了一个纳什均衡的存在性和唯一性的两个玩家版本的游戏。提出了一种迭代注水算法，有效地达到纳什均衡。迭代注水算法可以分布式实现，而不需要集中控制。它隐含地考虑到环路传递函数和交叉耦合，并且通过为环路提供机会来协商彼此之间的功率和频率的最佳使用，从而达到具有竞争力的最佳功率分配。当应用于甚高比特率数字用户线中的上行功率回退问题和非对称数字用户线中的下行频谱兼容性问题时，发现新的功率控制算法与现有方法相比，性能得到显着改善。
This paper considers the multiuser power control problem in a frequency-selective interference channel. The interference channel is modeled as a noncooperative game, and the existence and uniqueness of a Nash equilibrium are established for a two-player version of the game. An iterative water-filling algorithm is proposed to efficiently reach the Nash equilibrium. The iterative water-filling algorithm can be implemented distributively without the need for centralized control. It implicitly takes into account the loop transfer functions and cross couplings, and it reaches a competitively optimal power allocation by offering an opportunity for loops to negotiate the best use of power and frequency with each other. When applied to the upstream power backoff problem in very-high bit-rate digital subscriber lines and the downstream spectral compatibility problem in asymmetric digital subscriber lines, the new power control algorithm is found to give a significant performance improvement when compared with existing methods.