摘要
G3-PLC标准是一个主要面向智能电网通信技术的全球开放性协议,该协议中引入了正交频分复用(OFDM)技术,由于G3-PLC标准中的原基带OFDM信号为复数信号,在接收端需要采用相干检测技术进行解调,系统复杂度高。因此根据FFT原理,通过在频域对信号进行编码,使发送端OFDM信号实数化,从而在不影响系统可靠性的前提下简化系统接收端的复杂度。最后通过仿真对该方法进行验证,结果表明,无论在高斯信道还是在实际电力线载波信道中,系统性能均非常稳定。
The G3-PLC standard is a global open protocol for the smart grid communication technologies,and the orthogonal frequency division multiplexing(OFDM)technology is introduced into the protocol of the G3-PLC standard.Since the original baseband OFDM signal acts as the complex signal,the coherent detection technology needs to be adopted at the receiving terminal for signal demodulation,which makes the system complexity high.Therefore,the signal is encoded in frequency domain according to FFT theory to make the OFDM signal at transmitting terminal become real number,so as to simplify the complexity of system receiving terminal while ensuring the reliability of the system.The method is verified with simulation.The simulation results show that the system has extremely stable performance,wherever in Gauss channel or in real channel of power line carrier.
作者
赵黎
焦晓露
张峰
ZHAO Li;JIAO Xiaolu;ZHANG Feng(School of Electronic Information Engineering,Xi’an Technological University,Xi’an 710021,China)
出处
《现代电子技术》
北大核心
2018年第15期6-9,15,共5页
Modern Electronics Technique
基金
国家自然科学基金项目(61671362)
陕西省科技厅一般项目-工业领域(2017GY-081)
陕西省科技厅自然基金项目(2017JM6041)
西安市科技计划项目(2017075CG/RC038(XAGY001))
陕西省教育厅科技专项(2017JK0373)~~
关键词
电力线载波通信
智能电网
物理层
正交频分复用
帧结构
信号编码
power line carrier communication
smart grid
physical layer
orthogonal frequency division multiplexing
frame structure
signal encoding
