Performance Evaluation of Raised-Cosine Wavelet for Multicarrier Applications
Performance Evaluation of Raised-Cosine Wavelet for Multicarrier Applications
复制标题
多载波应用升余弦小波的性能评估
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
T. T. Mapoka
中科院分区：
文献类型：
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作者：
K. Anoh;R. Abd;O. Ochonogor;Y. A. S. Dama;S. Jones;T. T. Mapoka
– 小波是多载波系统的替代构建核心，例如正交频分复用（OFDM）。可以通过改变父基函数或构建新的滤波器来设计小波。多载波设计考虑了两种新的小波；一种是使用升余弦函数设计的，另一种是使用理想滤波器构建的。升余弦小波滤波器的频谱由滚降因子控制，这会导致许多扭曲的旁瓣。与升余弦小波相比，第二个小波族没有扭曲的旁瓣。与由理想滤波器构造的小波相比，就 BER 而言，将表明升余弦小波不太适合多载波环境中的多载波设计。
– Wavelets are alternative building kernels of the multicarrier systems, such as the orthogonal frequency division multiplexing (OFDM). The wavelets can be designed by changing the parent basis functions or constructing new filters. Some two new wavelets are considered for multicarrier design; one is designed using raised-cosine functions while the other was constructed using ideal filters. The spectrums of raised-cosine wavelet filters are controlled by a roll-off factor which leads to many distorting sidelobes. The second family of wavelet, which the raised-cosine wavelet is compared to, have no distorting sidelobes. It will be shown that raised-cosine wavelets are less suitable for multicarrier design in multicarrier environment, in terms of BER when compared to the wavelet constructed from the ideal filter .