电力线跳频扩频通信仿真研究

从分析低压配电网信道特点入手,提出了电力线频率资源使用受限的观点.为了解决电力线通信可靠性和干扰性问题,将跳频技术应用于电力线通信,建立了电力线跳频通信系统模型;讨论了跳频通信的关键技术,包括m序列选择、直接频率合成器(DDS)设计和跳频同步方法,并建立了电力线通信环境下跳频通信仿真模型;仿真试验表明:电力线跳频通信利用有限的电力线带宽资源,较好地实现了一定信噪比下的可靠通信.

Simulation Study on Frequency Hopping Spread Spectrum Communication over Power Lines

By analyzing the channel characteristics of low-voltage networks,the standpoint is put forward that the frequency applied to power line communication is a kind of limited resources.In order to settle out the problems such as the reliability and the interference,the technology of Frequency Hopping Spread Spectrum(FHSS) communication is applied to power line,and the model of FHSS for power line is built up.Some key technologies are discussed,such as the methods of designing m-sequence and carrying out the Direct Digital Synthesis(DDS) and keeping in synchronism and so on,and the simulation model of FH over the power line is built up.The simulation experiment shows that the frequency hopping with the limited frequency band source gives a new way of improving the reliability of communication over the power line.