下载文档原格式
Digital Signal Processing－principle －processing technologyIntroduce myselfName:管庆 Work in:140LAB-302 Room Phone:83201455(office) E-mail:qguan@1Contents1. The analysis and process of Discrete-Time Sequences and Systems in TimeDomain . (CH2) 2. DT Signal and LTI System in the Transform-Domain. The relationship among DTFT,DFT&ZT, the concept of Discrete-Time frequency response. (CH3,CH5,CH6) 3. The digital processing of continuous signal and the concept . (CH4)contents4.LTI DT System in Transform Domain and the structure of Digital Filter (CH7,CH8补) 5.The two design methods of Digital Filter (LP): Bilinear Transformation Method(IIR) & Windowed Function Method(FIR). And the physical concepts of the Digital Filter’s parameters. (CH9,CH10) 6.The algorithm idea of FFT, and use FFT to perform engineering computation. (CH5补)2contents7.The ADC Quantization concept and the Limit Cycles in IIR Digital Filters caused by Finite Wordlength Effects. (?) 8. About MATLAB tools and How to use the function of MATLAB ? Number of class: 64(include experiment:8)Reference books:Sanjit K. Mitra著，孙洪等译：“Digital Signal Processing—A Computer-Based Approach”(第三版， 上册）,电子工业出版社, 2006 [美]A.V.Oppenheim著，刘树棠、黄建国译: “Discrete-Time Signal Processing”, 西安交通大学出 版社，2002 程佩青：“数字信号处理教程”(第二版），清华大学 出版社，2001 应启珩、冯一云、窦维蓓：“离散时间信号分析与处 理”，清华大学出版社，2001 高西全、丁玉美、阔永红：“数字信号处理—原理、 实现及应用”，电子工业出版社，2006 胡广书：“数字信号处理—理论、算法与实现（第二 版）”，清华大学出版社，20033About examinationStyle:open-exam 成绩组成： 1.平时成绩 20% (出勤+作业+实验报告) 2. 中期考试 20% (5章结束后) 3. MATLAB上机考试 20% 4. 期末考试 40%Q&ATIME: 7:45 - 9:30 PM ADDRESS: (以网上公布为准) 周一，朱学勇，907 周二，管庆，302 周三，杨炼，302 周四，刘洪盛，9074Arrangement of ExperimentStart from 11 weeks All 8 learning hours, each time 2 hous The examination of MATLAB is arranged at the last time !Four experiments: Discrete signal’s generated，Analog signal’s sampled、Design FIR filter & FFT’s implemented All experiments should be done in Matlab !Learning From …...We haved learned “Signal and System”, and We have knowed some base concept: Continuous-Time Signal,Time-Domain, Impluse-response , Frequence-Domain, FT, FILTER, … Now we are learning “Digital Signal Processing”, the theory about processing Discrete-Time Signal . So we can use PC or DSP chips to compute !5Learning From …...Then we will learn “DSP Technology” to implement all algorithm of Digital Signal Processing !Welcome to our excellent course website !6What is DSP? Digital Signal ProcessingTheory, method, algorithmDigital Signal ProcessorA kind of microprocessor used to implement digital signal processing algorithmChapter One: Signal and Signal ProcessingVery simple: 1.Characterization and Classification of signals 2.typical Signal Processing Operations 3.Examples of Typical Signals71.What is a Signal?A signal is a function of independent variables such as time, distance, position, temperature, and pressure. Eg: speech signal, image signal, video signal Classification of signal: One-dimensional(1-D),Two-dimensional(2-D) and Vector signal(M-D) Periodic and Non-periodic Signal(3) Deterministic and Random signal (4) Energy and Power signal (5) Continuous-time, Discrete-time and Digital signal Analog Signal & Digital Signal : Analog signal: A continuous-time signal with a continuous amplitude. Digital signal: A discrete-time signal with discrete-valued amplitudes represented by a finite number of digits .8xa (t)0 txa (nT)t 0 T 2T 3Tx (n )的二进制数0110 0111 1100 0011 0100 0011 1001 0 1 2 3 4 5 6 7 …… 0 1 2 3 4t 8x(n)n2. What is signal processing?The objective of signal processing is to extract useful information carried by the signal. it is concerned with the mathematical representation of the signal and the algorithmic operation. For processing these signals, we usually transform them into transform-domain.9Typical Signal Processing Operations: Elementary Time-Domain Operations Filtering Generation of Complex Signals Modulation and Demodulation Multiplexing and Demultiplexing Quadrature Amplitude Modulation Signal Generation3.Examples of Typical SignalsPlease look at your book about all kinds of signal.10The basic framework of a DSP systemxa(t)Pre-filter AD x(n) DSPxy(n) DAAnalog filterya(t)1.Pre-filter:get rid of the frequency components we don’t interested. 2.ADC:transform analog signal into digital signal. 3.DSP:process the digital signal.Eg:convolution,correlation,filter… 4.DA:to transform digital signal into analog signal. 5.Analog filter:filter the high frequency that is needless. Look at next figure sequences to show the process of DSP:11Signal Processed by DSPSubjects of DSPThe analysis of DT-LTI system The analysis of DT signal in time-domain & frequency-domain, DFT theory AD,DA technology,sampling, multi-rate sampling, quantization noise…. Digital filter Spectrum analysis and FFT, convolution, correlation.12Subjects of DSPAdaptive signal processing Signal estimation, include power spectrum and correlation function estimation Signal compression, include speech and image compression Signal modeling, include AR,MA,ARMA Other special algorithm (decimation and interpolation…) DSP implementation and application.DSP application1.Programmable swithes:132.Mobile communication system:3.Digital camera:144.High Definition TV5.family cinema156.Walkman and DVD7.Flight simulator168.Global Position System(GPS)9.Radar1710.Image recognition11.Software radioLNABPFBPFADCDSPaudio Digital videoLocal oscillator18More application19。
