DTFT Properties Using the differentiation property of the DTFT given in Table 3.2, we observe that the DTFT of nx[n] is given by

广东海洋大学：《数字信号处理 Digital Signal Processing》课程教学资源（作业习题）第四章 有限长单位脉冲响应滤波器的设计方法（习题及答案）

广东海洋大学：《数字信号处理 Digital Signal Processing》课程教学资源（作业习题）第三章 无限长单位脉冲响应滤波器的设计方法（习题及答案）

广东海洋大学：《数字信号处理 Digital Signal Processing》课程教学资源（作业习题）第二章 离散傅立叶变换与快速算法（习题及答案）

Linear-Phase FIR Transfer Functions It is nearly impossible to design linear- phase IIR transfer function It is always possible to design an FIR transfer function with an exact linear-phase response

一、Textbook S.K. Mitra, Digital Signal Processing-A Computer-Based Approach, Third Ed

Discrete-Time Systems A discrete-time system processes a given input sequence x[] to generates an output sequencey[n] with more desirable properties In most applications, the discrete-time system is a single-input, single-output system:

3.1 离散傅里叶变换的定义 3.2 离散傅里叶变换的基本性质 3.3 频率域采样 3.4 DFT的应用举例

一、频率响应 二、传输函数 三、简单滤波器 四、一些特殊的传输函数

Transform-Domain Representation of Discrete-Time Signals Three useful representations of discrete-time sequences in the transform domain: Discrete-time- Fourier Transform(DTFT) YDiscrete Fourier Transform(DFT) z- -Transform