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傅里叶变换

于 2023-07-08 发布 文件大小:1.24 MB
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傅里叶变换;stm32f469一种积分变换,它来源于函数的傅里叶积分表示。积分 (1) 称为ƒ 的傅里叶积分。周期函数在一定条件下可以展成傅里叶级数,而在(-∞,∞)上定义的非周期函数ƒ,显然不能用三角级数来表示。但是J.-B.-J.傅里叶建议把ƒ表示成所谓傅里叶积分的方法。傅里叶变换在物理学、电子类学科、数论、组合数学、信号处理、概率论、统计学、密码学、声学、光学、海洋学、结构动力学等领域都有着广泛的应用(例如在信号处理中,傅里叶变换的典型用途是将信号分解成幅值谱——显示与频率对应的幅值大小)

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