脉冲成形滤波器是通信调制当中不可或缺的部分。从滤波器的视点入手再到系统级的视点详细阐明了脉冲成形滤波器的特性和设计方法，给出了相应的实验结果，并就其特点给出了多相滤波器结构的实现方法。通过实验分析表明，升余弦滚降滤波器并非最优的方案，在很多应用当中升余弦滚降应该被更经济更有效的方案所替代，包括本文中提到的奈奎斯特滤波器。%The pulse shaping filter is an integral part of Communication modulation systems. Starting from the perspective of filter design to system-level view, pulse shaping filter characteristics and design methods are described and analyzed in detail, the corresponding experimental results are given, and the structure of the polyphase filter implementation method is presented. Through experimental analysis shows that the raised cosine roll-off filter is not optimal solutions, in many applications, which raised cosine roll-off should be replaced by more economical and effective program, including the Nyquist filter mentioned in this article.
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