基于多载波扩频技术的低压电力线通信研究

为解决数据在低压电力线传输中产生的频率选择性衰落和ISI问题．提出了基于多载波扩频的低压电力线通信方法。该方法针对具体的多载波直扩CDMA系统结构．分析了在低压电力线中参数配置与可恢复路径数之间的关系，不同的参数配置、多用户条件下的系统性能以及接受信号及其抗干扰。在相同带宽相同检测算法条件下仿真表明，应用该系统结构可以获得比已有的直扩CDMA系统更好的特性．大大提高低压电力线传输过程中抗多址干扰和ISI的能力。

Research on Low-voltage PLC Based on Multicarrier Spreading Spectrum Technique

To resolve the problem of the frequency selective fading and ISI caused by data transmission in channel, this study proposes one communication method in low-voltage power line based on multicarrier spreading spectrum technique （researches on multicarrier spreading spectrum technique）. According to the special structure of Multicarrier Direct Sequence Code Division Multiple Access （MC-DS-CDMA,） system, this study analyses the relation of parameters configure and resumable path numbers, and the performance of system in different parameters configure and multiuser. By the simulating and comparing of the same bandwidth and measure arithmetic at last, it can obtain better performance than the direct sequence CDMA （DS-CDMA, Direct Sequence Code Division Multiple Access） and greatly promote the capacity of anti-MAI and anti-ISI in the process of transmission.