用于家庭电力线通信网络的动态速率自适应充水比特加载技术离散多音收发器

S. Baig, N. Gohar
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引用次数: 7

摘要

基于电力线的家庭网络是一种新兴技术,它允许消费者使用他们现有的电线系统,使他们的电脑和其他家用电子设备相互通信,并共享互联网带宽。离散多音(DMT)是有线信道OFDM的一种变体,它具有固有的灵活性,可以根据每个子信道上的信噪比(SNR)来调整调制方案。电力线信道是慢时变信道,子信道信噪比可能随时间变化,那么比特和能量的分布可能需要相应的变化。这种位和能量分布的变化需要动态位加载。为了提高传输速率,我们提出了一种动态速率自适应充水比特加载技术,该技术可以根据估计的信道状态信息来改变子信道的比特加载
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Discrete multi-tone (DMT) transceiver with dynamic rate adaptive water-filling bit-loading technique for in-home power line communication networks
Power line based home networking is an emerging technology that allows consumers, using their existing electrical wiring system, to get their computers and other home-electronics devices communicating among themselves, and also share the Internet bandwidth. Discrete multi-tone (DMT), a variant of OFDM, for wired channels is adopted as a multiplexing technique that has the inherent flexibility to adapt the modulation scheme according to the signal-to-noise ratio (SNR) on each subchannel. The power line channel being a slow time variant channel, sub-channel SNRs may change with time, then the bit and energy distribution may need a corresponding change. Such variation in the bit and energy distributions calls for dynamic bit-loading. We propose the application of a dynamic rate adaptive water filling bit-loading technique in order to increase the transmission rate by changing the subchannel bit-loading according to the estimated channel state information
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