Chapter 6 IIR Digital Filter Design
Chapter 6 IIR Digital Filter Design
Introduce ● Digital Filter One of the most widely used complex signal processing operations is filtering, whose main objective is to alter the spectrum according to some given specifications. The system implementing this operation is called a filter. The discrete-time system for the treatment of discrete-time signal is called a digital filter 2021年12月5日2时7分
2021年12月5日2时7分 Introduce ⚫ Digital Filter -- One of the most widely used complex signal processing operations is filtering, whose main objective is to alter the spectrum according to some given specifications. The system implementing this operation is called a filter. The discrete-time system for the treatment of discrete-time signal is called a digital filter
Introduce o Classification of Digital Filter According to the characterization of the eliminated frequency component, the digital filters are usually classified as ◆ Classical filters The useful frequency components in input signal are different from the eliminated frequency components ◆ Modern filters The signal is aliased into interferer frequency component 2021年12月5日2时7分
2021年12月5日2时7分 Introduce According to the characterization of the eliminated frequency component, the digital filters are usually classified as: ◆Classical filters The useful frequency components in input signal are different from the eliminated frequency components. ◆Modern filters The signal is aliased into interferer frequency component. ⚫ Classification of Digital Filter
Introduce o Classification of Digital Filter According to magnitude characteristics of the transfer function the Classical filters include 口 Lowpass filters 口 Highpass filters 口 Bandpass filters 口 Bandstop filters 2021年12月5日2时7分
2021年12月5日2时7分 Introduce ◆ According to magnitude characteristics of the transfer function, the Classical filters include: Lowpass filters Highpass filters Bandpass filters Bandstop filters. ⚫ Classification of Digital Filter
低通 e 2丌 2丌 高通 H(e 兀 带通 H(e 带阻 T 图6.1.1理想低通、高通、带通、带阻滤波器幅度特性 2021年12月5日2时7分
2021年12月5日2时7分 图6.1.1 理想低通、高通、带通、带阻滤波器幅度特性 ( e ) j H ( e ) j H ( e ) j H ( e ) j H 0 低 通 0 高 通 0 带 通 0 带 阻 −2π −2π −2π −2π −π −π −π −π π π π π 2π 2π 2π 2π