基于多进制扩频的低压电力线抄表技术的研究

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。...

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Bibliographic Details
Published in电力系统保护与控制 Vol. 42; no. 5; pp. 136 - 141
Main Author 高强 王艳阳 杨红叶 刘娜
Format Journal Article
LanguageChinese
Published 华北电力大学电气与电子工程学院,河北 保定,071000 2014
Subjects
伪随机序列
多进制
扩频
抄表
电力线
power line
扩频
多进制
抄表
meter reading
电力线
multi-band
pseudo-random sequence
伪随机序列
spread spectrum
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Summary: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。
Bibliography:power line; multi-band; meter reading; spread spectrum; pseudo-random sequence
41-1401/TM
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
ISSN:1674-3415