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首页> 外文期刊>IEEE systems journal >Incremental Relaying for Power Line Communications: Performance Analysis and Power Allocation
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Incremental Relaying for Power Line Communications: Performance Analysis and Power Allocation

机译：电力线通信的增量中继：性能分析和电源分配

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摘要

In this paper, incremental decode-and-forward (IDF) and incremental selective decode-and-forward (ISDF) relaying are proposed to improve the spectral efficiency of power line communication. Contrary to the traditional decode-and-forward (DF) relaying, IDF and ISDF strategies utilize the relay only if the direct link ceases to attain a certain information rate, thereby improving the spectral efficiency. The path gain through the power line is assumed to be log-normally distributed with high distance-dependent attenuation and the additive noise is from a Bernoulli-Gaussian process. Closed-form expressions for the outage probability, and approximate closed-form expressions for the end-to-end average channel capacity and the average bit error rate for binary phase-shift keying are derived. Furthermore, a closed-form expression for the fraction of times the relay in use is derived as a measure of the spectral efficiency. Comparative analysis of IDF and ISDF with traditional DF relaying is presented. It is shown that the IDF is a specific case of ISDF and can obtain optimal spectral efficiency without compromising the outage performance. By employing power allocation to minimize the outage probability, it is realized that the power should be allocated in accordance with the inter-node distances and channel parameters.
机译：为了提高电力线通信的频谱效率，本文提出了增量解码转发（IDF）和增量选择性解码转发（ISDF）中继。与传统的解码转发（DF）中继相反，IDF和ISDF策略仅在直接链路停止获得一定的信息速率时才使用中继，从而提高了频谱效率。假定通过电源线的路径增益是对数正态分布的，具有与距离相关的高衰减，并且附加噪声来自伯努利-高斯过程。推导了中断概率的封闭式表达式，以及端到端平均信道容量和二进制相移键控的平均误码率的近似封闭式表达式。此外，得出了继电器使用次数的分数形式的闭式表达式，作为频谱效率的度量。给出了IDF和ISDF与传统DF中继的比较分析。结果表明，IDF是ISDF的一种特殊情况，可以在不影响中断性能的情况下获得最佳频谱效率。通过采用功率分配来最小化中断概率，实现了应当根据节点间距离和信道参数来分配功率。

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