具有QoS要求的矢量DSL传输的最优联合收发线性处理

D. Palomar, M. Lagunas, J. Cioffi
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引用次数: 4

摘要

考虑一种数字用户线路(DSL)系统,其中一束内的双绞线铜线子集可以在通信系统的两端执行联合处理(例如,中心局和远程终端之间或中心局和专用网络之间的链路)。DSL信道被视为一个多输入多输出(MIMO)系统,在该系统上建立了许多子流。假设在每个子流上使用的信号星座都有相应的服务质量(QoS)约束,例如保证一定的错误概率。其目的是优化设计联合收发线性处理,以最小的发射功率满足QoS要求。为了在实际应用中有效地解决这一问题,提出了一种新的多级充水算法。利用最近开发的实际DSL MIMO信道模型进行了仿真,得到了数值结果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Optimum joint transmit-receive linear processing for vectored DSL transmission with QoS requirements
A digital subscriber line (DSL) system is considered, in which a subset of the twisted-pair copper wires within a bundle can perform a joint processing at both sides of the communication system (e.g., links between central offices and remote terminals or between central offices and private networks). The DSL channel is treated as a multi-input multi-output (MIMO) system over which many substreams are established. It is assumed that the signal constellation to be used at each substream is given with a corresponding quality of service (QoS) constraint, e.g., to guarantee a certain error probability. The aim was to optimally design joint transmit-receive linear processing to satisfy the QoS requirements with minimum transmit power. A novel multi-level water-filling algorithm is proposed to solve the problem very efficiently in practice. Numerical results were obtained from simulations using realistic DSL MIMO channel models recently developed.
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