数字信号处理Digital Signal Processing 电子信息工程系韩建峰
Sections
?About DSP course.?What is DSP?
?Why use DSP?
?Realization of DSP.?Signals and systems.?DSP systems.
Reading assignments This lecture ?Chapter 1: Introduction
About DSP course
?48学时
?考核方式：
平时成绩占30％
（包含作业、测验、出勤、课堂表现）考试成绩占70％
?考试方式：
笔试、闭卷、英文命题
?英文影印版（教材）
–书名: Signal Processing First
–著者: James H. McClellan，
Ronald W. Schafer，
Mark A. Yoder
–出版社：科学出版社
–标准书号：7-03-011618-6/TN.488–出版时间：2003-12-30
–定价：￥45.00
–附注：含光盘
?中文翻译版（参考书）–信号处理引论
–作者：James H. McClellan
–译者：周利清
–出版社：电子工业出版社
–ISBN书号：7-121-00637-5 –出版日期：2005年4月
–定价:48.0元
?Preview & Review
–See handouts
?Do more exercise
–《数字信号处理》双语学习
及MATLAB实验指导书
–Companion CD-ROM
?Do more computer experiments –MATLAB
–《数字信号处理》双语学习
及MATLAB实验指导书
?Download from
精品课程网站
网络教学\课程
?Do the homework by computer.
(Matlab, word, MathType)
?And send the homework to 网络教学on time.
COURSE OBJECTIVE
?Students will be able to:
Understand mathematical descriptions of signal processing algorithms and express those algorithms as computer implementations (MATLAB)
?What are your objectives?
What is DSP?
?Digital Signal Processing
--A method for processing signals.
?Digital Signal Processor
--A special type of microprocessor most suitable to do math, esp. DSP algorithm.
DSP devices around us
Digital Media Processing
Webpad
Telematics
Wireless Devices:
802.11, Bluetooth,
Others
Military and
Government Cellular,
Secure Connectivity Industry-Specific
PDAs
Biometrics
Medical
Devices
Why use DSP?
Parameter
Analog Signal Digital Signal Processing Processing
容错能力
1-10%.003%灵敏度（漂移）Temp,Time None Noise Floor
60dB typ
90+dB
灵活性（适应性）Hard, Expensive Easy, Low Cost 增益调节Hand tuning Auto tuning 重新设计New Board New Code
布局Noise Sensitive Digital Immunity 高级功能
Hardware Intensive Additional Software 多种处理能力Multiple Hardware More MIPS & Software 大小Larger
Smaller 可靠性
Lower
Higher
精度高
灵活性强集成度高高性能
Realization of DSP
?软件实现：利用现成或自编代码，借助通用计算机易修改、速度慢，不能实时－－应用于科研、教学
?硬件实现：运算单元电路（加法器、乘法器、延时器）搭建
速度快、不灵活
?通用、或专用DSP芯片
Providers of DSP
?Analog Device：AD2181,AD21062?Lucent: 16210?Motorola: 56305
?Texas Instrument TMS320 serial
DSPs of TI
TMS320C5000?
Lowest Power/MIPS
DSPs in the World
Most Control-Optimized DSPs in the World
TMS320C2000?
Highest-Performance
DSPs in the World
TMS320C6000?
TI 5402 DSK board
DSP functions
?Overview
–Amplification, Filtering, Transform,…
–Compression/Decompression, Modulation/
Demodulation, Coding/Decoding, …
?Key Functions
–Digital Filtering & Filter Design
–Signal Transforms & Spectral computation
DSP Knowledge Structure ?Fundamentals
?Digital Audio
?Speech signal processing ?Image processing
?Video signal processing ?Adaptive signal processing
?…
Signals
?Something carries information
?Patterns of variations that represent or encode information
?analog signal, digital signal
?continuous-time signal, discrete-time signal
Continuous-time signal