連續時間信號與離散時間信號 連續時間信號(continuous-time signal)：連續時間 信號以函數x(t)表示之，其中t是連續時間變數。 離散時間信號(discrete-time signal) ：離散時間信 號只定義在離散的時間點上，一般以離散時間變數 n的序列(sequence) x[n]表示之，其中變數n為整數

第一节 信息物质 Signal Molecules 第二节 受体 (Receptor)

Chapter 5 Signal Encoding Instructor: Dr. Tianshuang Qiu School of the Electronic and Information Engineering Fall of 2004

The purpose of a receiver is to select a desired group of frequencies from one transmitter, get rid of all unwanted signals and noise, and then demodulate the signal to obtain the modulating infomation. The better the receiver does its job, the closer the demodulated sigmal will resemble the original signal from the transmitter. Regardless of the type of demodula

西安电子科技大学：《Digital Signal Processing》课程教学资源（课件讲稿）Chapter 4A Digital Signal Processing of Continuous Signals Part A Sampling of Continuous-Time Signals

西安电子科技大学：《Digital Signal Processing》课程教学资源（课件讲稿）Chapter 1 Signals and Signal Processing（主讲：李勇朝）

The signal suffers an attenuation loss l Received power PR= PT/L Received snr=E,/No, Eb=Pr/Rb Antennas are used to compensate for attenuation loss Capture as much of the signal as possible

◆8.0 Introduction ◆8.1 Representation of Periodic Sequence: the Discrete Fourier Series (DFS) ◆8.2 Properties of the DFS ◆8.3 The Fourier Transform of Periodic Signal ◆8.4 Sampling the Fourier Transform ◆8.5 Fourier Representation of Finite-Duration Sequence: the Discrete Fourier Transform(DFT) ◆8.6 Properties of the DFT ◆8.7 Linear Convolution using the DFT ◆8.8 the discrete cosine transform (DCT)

◆3.0 Introduction ◆3.1 z-Transform ◆3.2 Properties of the Region of Convergence for the z-transform ◆3.3 The inverse z-Transform ◆3.4 z-Transform Properties ◆3.5 z-Transform and LTI Systems ◆3.6 the Unilateral z-Transform

6.0 Introduction 6.1 Block Diagram Representation of Linear Constant-Coefficient Difference Equations 6.2 Signal Flow Graph Representation of Linear Constant-Coefficient Difference Equations 6.3 Basic Structures for IIR Systems 6.4 Transposed Forms 6.5 Basic Network Structures for FIR Systems