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FAM算法的循环谱计算

于 2022-01-30 发布 文件大小:2.51 kB
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代码说明:

计算信号的循环谱,并画出三位仿真图跟等高线图。采用的FAM 是基于快速傅里叶变换运算的时域平滑抽取算法,该算法包含了基本时域平滑算法的所有思想,首先对输入序列进行下抽样,以每组 N "个数据进行 N "点 FFT,接着将滤波器输出结果频移到基带获得抽样后的基带复包络信号,然后将复包络乘积序列进行 P ( P = N / L)点 FFT。

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