PAPR reduction of wavelet-OFDM systems using pilot symbols
PAPR reduction of wavelet-OFDM systems using pilot symbols
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DOI：
10.1109/isplc.2018.8360242
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发表时间：
2018-05
期刊：
影响因子：
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通讯作者：
K. Anoh;Augustine Ikpehai;Khaled Maaiuf Rabie;B. Adebisi;W. Popoola
中科院分区：
文献类型：
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作者：
K. Anoh;Augustine Ikpehai;Khaled Maaiuf Rabie;B. Adebisi;W. Popoola
小波变换是 IEEE 1901 电力线通信标准的核心，该标准使用正交频分复用 (OFDM) 方案。用于设计基于小波的 OFDM (WOFDM) 的小波示例已被证明具有比传统的基于快速傅里叶变换 (FFT) 的 OFDM 更低的峰均功率比 (PAPR)。在本研究中，我们研究了 29 种不同的正交小波，这些小波可用于根据 PAPR 和启用这些小波的滤波器的旁瓣行为来设计 WOFDM。我们的 WOFDM 模型表明，大多数正交小波随着滤波器系数长度的增加而实现更好的 PAPR。此外，我们还演示了一种导频辅助正交频分复用（PA-OFDM）处理方法，以进一步降低WOFDM系统的PAPR。该技术可降低 PAPR，且不会增加复杂性，也不会产生额外的带宽成本。
Wavelet transform is at the heart of IEEE 1901 power line communication standard which uses orthogonal frequency-division multiplexing (OFDM) scheme. Examples of wavelets used in designing wavelet-based OFDM (WOFDM) have been shown as possessing lower peak-to-average power ratio (PAPR) than the conventional fast Fourier transform (FFT)-based OFDM. In this study, we investigate 29 different orthogonal wavelets that can be used in designing WOFDM in terms of PAPR and sidelobes behaviour of the filters that enable these wavelets. Our WOFDM model shows that most orthogonal wavelets with increasing filter coefficient lengths achieve better PAPR. In addition, we also demonstrate a method of pilot-assisted OFDM (PA-OFDM) processing to further reduce the PAPR of the WOFDM systems. This technique achieves PAPR reduction with no added complexity and no extra bandwidth cost.