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:

Phase and Group Delays The output y[n] of a frequency-selective LTI discrete-time system with a frequency response(@) exhibits some delay relative to the input x[n] caused by the nonzero phase response 0(@) =arg{()} of the system

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

4-1引言 4-2按时间抽取(DIT)的FFT算法 4-3DIF的FFT算法 4-4IFFT算法 4-5线性卷积的FFT算法

Stability Condition in Terms of the Pole Locations A causal lti digital filter is BIBO stable if and only if its impulse response h[n] is absolutely summable, i.e

一、概述 二、SHARC系列DSP的处理器核 三、SHARC系列DSP的存储器 四、SHARC系列DSP的集成外部接口(DMA、链路口、串行口、主机接口)

一、DSPDigital signal processing 1、Signal 2、System 3、Signal Processing 4、 Real-time Processing

1. Digital Signal Processing基本概念 2.DSP发展筒史 3.DSP的新兴分支

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

同济大学：《数字信号处理（DSP）》课程教学资源（PPT课件讲稿）第四章 快速傅里叶变换（4/9）