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LTI 系统的频域分析

LTI 系统的频域分析. f(t). y(t). h(t). 信号 傅立叶变换： f(t) F(j ω )= F(j ω ) （幅频特性）或 φ ( ω )( 相频特性 ) 。 系统频域分析是分析系统的激励和响应在频域中的关系。 一 . 频率响应： . 不考虑初始条件（即在零状态响应下）. 即：. y(t)=h(t)* f(t). y(t). f(t). h(t) H(j ω ). 关系满足卷积定理. F(j ω ).

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LTI 系统的频域分析

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  1. LTI系统的频域分析 f(t) y(t) h(t) • 信号 傅立叶变换：f(t) F(jω)= F(jω) （幅频特性）或φ (ω)(相频特性)。 系统频域分析是分析系统的激励和响应在频域中的关系。 一.频率响应： . 不考虑初始条件（即在零状态响应下） 即： y(t)=h(t)* f(t) y(t) f(t) h(t) H(j ω) 关系满足卷积定理 F(j ω) Y(j ω)= H(j ω) F(j ω) Y(j ω)

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