光通信研究, 2017 (2): 5, 网络出版: 2017-05-03  

基于小波变换的OFDM在电力线通信系统中的应用

Performance Comparison of FFT-OFDM and DWT- based OFDM in PLC
作者单位
苏州大学 电子信息学院, 江苏 苏州 215006
摘要
研究了基于DWT(小波变换)的OFDM(正交频分复用)和FFT (快速傅里叶变换)的OFDM两种不同调制方式在PLC(电力线通信)系统中的性能。首先建立了两种不同调制方式下PLC的系统模型, 然后在AWGN(加性高斯白噪声)和子CFO(载波频率偏移)的干扰下, 分析了两种系统的误码性能以及峰均功率比的分布。通过仿真发现, 在PLC系统中, DWT-OFDM系统比FFT-OFDM系统更具优势, 在未来的PLC系统中必将发挥重要的作用。
Abstract
We mainly compared the performance of Fast Fourier Transform(FFT) Orthogonal Frequency Division Multiplexing(OFDM) and Discrete Wavelet Transform(DWT) OFDM in Power Line Communication (PLC). We first shown the PLC channel model. Then the Bit Error Rate(BER) and Peak-to-Average Power Ratio (PAPR) performances of DWT-OFDM and FFT-OFDM are analyzed with the interference of Additive White Gaussian Noise(AWGN) and Carrier Frequency Offset (CFO). Throughout the simulation, DWT-OFDM is more appropriate to power line communications in the PLC system, which will make significant influence on the PLC in the future.
参考文献

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