摘要
低压电力线通信可分为远程抄表和实现高速Internet接入网两个主要应用方向。文章根据电力线信道的特性以及低速和高速信息传输的不同要求,指出对于数据传输速率较低的远程抄表系统可使用时分复用的扩频调制技术,但要注意选择合适的载波频率和扩频伪随机序列;高速Internet接入网则适合应用正交频分复用调制技术(OFDM),以克服低压电网对信号传输的不利影响,如噪声大、衰减强特点等。
Low voltage power line communication has two main application fields, one is automatic meter reading system using power line carrier and the other is high speed connection with Internet. According to the channel characteristics of power line and different requirements to low-speed and high-speed transmission of informations, the authors proposed that the Time Division-Spread Spectrum (TD-CDMA) is suitable for remote meter reading system with low data transmission rate, but special attention should be paid to the selection of proper carrier frequency and the pseudo-random sequence in the spread spectrum, the Orthogonal Frequency Division Multiplexing (OFDM) is suitable for high speed connection with Internet in order to weaken the effects of power line on transmitted signal, such as high noise level and strong attenuation, etc.
出处
《电网技术》
EI
CSCD
北大核心
2004年第22期44-47,共4页
Power System Technology
