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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 ,文中所提出的方法可大大减少多径干扰量
Based on the concept of Orthogonal Frequency Division Multiplexing (OFDM), a new idea of using multi-scale orthogonal wavelet bases to replace the cosine function bases in traditional orthogonal frequency division multiplexing modulation (OFDM) is proposed. Based on the multi-carrier system model The quantitative index of multi-path interference is deduced. On the actual low-voltage power carrier channel model, multipath interference generated by the above two OFDM methods is calculated. The results show that compared with the traditional OFDM method, The proposed method can greatly reduce the multipath interference