摘要
基于正交频分复用的概念 ,提出了使用多尺度正交小波基取代传统正交频分复用调制(OFDM)中的余弦函数基的新想法 ,并且基于滤波器组的多载波系统模型推导出衡量多径干扰的定量指标 ,在实际低压电力载波通道模型上 ,对使用上述两种OFDM方法所产生的多径干扰进行了计算 ,计算结果表明 ,与传统的OFDM方法相比 。
A novel orthogonal frequency division multiplexing (OFDM) method, in which the cosine carriers of the conventional OFDM system are replaced with the multi-scale orthonormal wavelets, is proposed. A quantitative index for measuring the multipath interference is deduced using a filter bank-based multi-carrier transmission system model. The effectiveness of the proposed OFDM over the conventional OFDM in reducing both the ISI and the ICI is verified on a model obtained from a practical low-voltage power line communication channel.
出处
《电力系统自动化》
EI
CSCD
北大核心
2003年第17期31-34,共4页
Automation of Electric Power Systems
基金
中华电力教育基金会许继奖教金资助项目
关键词
电力线通信
多径效应
正交小波
多载波传输
Computer simulation
Electric power transmission networks
Orthogonal frequency division multiplexing
Performance
Wavelet transforms
