Rate-Boosting Using Strong Crosstalk in Next Generation Wireline Systems
Rate-Boosting Using Strong Crosstalk in Next Generation Wireline Systems
复制标题
在下一代有线系统中使用强串扰提高速率
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
Per Ödling
中科院分区：
文献类型：
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作者：
Yezi Huang;T. Magesacher;E. Medeiros;Chenguang Lu;Per;Per Ödling
下一代有线系统可在短线路上利用高达几百MHz的频率。强串扰耦合（与直接路径相当）是高频下的主要信道特性之一。而不是完全消除所有串扰，我们利用强串扰路径，以提高数据速率的活跃用户。提出了两种分别基于最大比合并（MRC）和凸优化的线性预编码方案，并应用于常见的网络拓扑结构。预编码方案利用未使用线路上或相邻线路上未使用频谱部分中的建设性串扰信号来提高数据速率，同时仍然符合每线路规定的频谱功率限制。与最先进的线性预编码相比，每个活动用户可以获得超过500 Mbps的吞吐量增益。
Next-generation wireline systems may exploit fre- quencies up to several hundred MHz on short lines. Strong crosstalk coupling, comparable to the direct paths, is one of the main channel characteristics at high frequencies. Instead of fully cancelling all crosstalk, we utilize strong crosstalk paths to boost data-rate for active users. Two linear precoding schemes, based on maximum ratio-combining (MRC) and convex optimization, respectively, are proposed and applied to a common network topology. The precoding schemes exploit constructive crosstalk signals on unused lines or in unused parts of the spectrum on neighboring lines to boost data-rate while still complying with the regulated spectral power limits per line. More than 500 Mbps throughput gain per active user can be achieved compared to state-of-the-art linear precoding.