The cosine window function is introduced and applied in the plane wave synthesis technique.

本文介绍了余弦窗函数，并将其应用到平面波综合技术中。

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Compared with the amplitude-frequency characteristic of the window functions often used at present, its property has an advantage over the rising-cosine function improved.

与目前常用的几种窗函数的频率特性相比较，其性能优于改进的升余弦窗函数。

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Compared with the amplitude-frequency characteristic of the window functions often used at present, its property has an advantage over the rising-cosine function improved.

与目前常用的几种窗函数的频率特性相比较，其性能优于改进的升余弦窗函数。

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