载波抄表系统通信方案研究

Research on Communication Scheme Based on Power Metering System by Carrier Wave

分析了我国低压电力线载波信道特征和传统载波通信电路的机理 ,指出传统载波通信芯片的抗干扰和抗衰减性能不足以克服低压电力线路的障碍。提出一种符合我国低压电力线载波信道传输特性的通信调制方法 ,该调制方法结合窄带调频通信和宽带扩频通信优势 ,以高速CPU和 8位A/D转换器为硬件基础 ,其抗衰减和干扰的性能较大的优势 。

The paper analyzed the communication channel characteristics of low voltage power line carrier wave and the mechanism of traditional carrier wave corresponding circuit in China,pointing out the disadvantages of traditional carrier wave communicational CMOS chip are anti-jamming and anti-attenuation those are too weak to get over the obstacle of low voltage power line.The paper put forward a method by using modulate communication signal which accord with the transmission characteristics of communication channel of low voltage power line carrier wave.The communication method integrating the advantages of narrowband frequency modulation and broad band spread frequency communication,which based on high speed CPU and 8 bit AD switch-box ,has big advantages on anti-jamming and anti-attenuation,and can make dependable power line carrier wave communication.