摘要
低压电力线通信广泛应用于电力抄表系统中。由于低压电力线信道特性复杂,严重影响载波通信质量,结合相关数据资料对低压电力线信道噪声环境进行了分析。为了提高电力线信道条件下的传输可靠性,提出多进制扩频技术,构造了多进制伪随机序列。设计了多进制扩频的低压电力线抄表方案,并建立了基于该信道特性的电力线扩频通信系统模型。通过对其性能仿真验证,仿真结果表明:该多进制扩频方式有效改善了抄表系统误码率性能,更适合于电力线的抄表作业。
Low voltage power line communication is an important technology of the electric power meter reading system. The low-voltage power line channel is complex and seriously affects the quality of carrier communication. Combining with relevant data, the paper analyzes the low-voltage power line channel noise environments. The multi-band spread spectrum technology is put forward and is applied to the power meter reading system in order to improve the performance of noise resistance. Characteristic polynomial of multi-band pseudo random sequence is proposed. The way of data shift register is used to produce multi-band spread spectrum code： The research of autocorrelation function characteristics and cross-correlation function characteristics of multi-band spread spectrum sequence is simulated. And the characteristics of error rate is presented. The results show that the performance of multi-band spread spectrum code is better than that of binary spread characteristics of error rate. At the same time, low voltage power line designed. spectrum code. And it can improve the performance of meter reading scheme of multi-band spread spectrum is
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2014年第5期136-141,共6页
Power System Protection and Control
关键词
电力线
多进制
抄表
扩频
伪随机序列
power line
multi-band
meter reading
spread spectrum
pseudo-random sequence
