一种低压电力线载波通信主动抗干扰技术

针对低压电力线通信由于环境复杂、用户类型繁多、用电时间随机等因素导致干扰,严重时造成通信失败的情况,研究了低压电力线路负载和干扰的性质与规律,建立了信道噪声模型,提出了一种低压电力线载波通信主动抗干扰技术。该技术将收发控制器的阻抗与低压电力通信线路阻抗进行最大限度匹配;对扩频技术进行拓宽研究,进一步提出在扩展频谱的基础上主动选择高可靠性的频段通信的方法,以克服低压电力线的强衰减、强干扰的缺陷。最后本文搭建了实验环境,并对低压电力线存在白色噪声、周期性噪声、脉冲噪声等干扰情况进行了通信实验,结果表明本文方法可行。

Active Anti-jamming Technique for Low Voltage Power Line Carrier Communication

Because of the complicated environment, various types of users, random time of power consumption and so on, the low-voltage power line communication has interference, which causes communication failure seriously. In this paper, the characteristics and laws of load and interference in low voltage power lines are studied. A channel noise model is established, and an intelligent active anti-interference technique for low voltage power line carrier communication is proposed. This technique matches the impedance of the transceiver controller with the impedance of the low voltage power communication line to a maximum, and broadens the spread spectrum technology. We further propose a method of actively selecting a high reliability band to communicate on the basis of spread spectrum, so as to overcome the strong attenuation and strong interference defects of low voltage power line. The experimental environment is set up, and the communication experiments are carried out for low voltage power lines, such as white noise, periodic noise and impulsive noise. The results show that the method is feasible.