[工学]离散时间信号处理PPT_第二章离散时间信号系统.ppt

References 1. 郑君里，《信号与系统（下册）》，高等教育出版社。 2. A.V. 奥本海姆，《离散时间信号处理》，科学出版社，2000年8月。- 3. 程佩清，《数字信号处理教程（第二版）》，清华大学出版社。 4. Vinay K.Ingle，刘树棠译，《数字信号处理及其Matlab实现》，西安交通大学出版社。 5. 丁玉美，《数字信号处理》，西安电子科技大学出版社 . Digital Signal Processing Digital Signal Processing The foundation of information technology is digitalization. The kernel of digitalization is digital signal processing Most of digital signal processing, especially real-time processing are implemented by DSP processor DSP technology becomes hot front edge and is growing up rapidly. DSP Solution Mobile phone The handset is not only used for voice communication ADSL（Asymmetric Digital Subscriber Line) ADSL是非对称数字用户线路（Asymmetric Digital Subscriber Line）的缩写，有时也作非对称数字用户环路（Asymmetric Digital Subscriber Loop）。它是一种在电话铜缆上进行较高速率数据传输的方法，是DSL 的一种形式。它以普通电话线路做为传输介质，既在普通双绞铜线上实现下行高达8Mbit/s传输速度；上行高达640Kbit/s的传输速度，我们只要在普通线路两端加装ADSL设备，既可使用ADSL提供的高带宽服务，通过一条电话线，便可以比普通MODEM快一百倍 DSL（数字用户线路，Digital Subscriber Line）是以铜质电话线为传输介质的传输技术组合，它包括HDSL、SDSL 、VDSL 、ADSL和RADSL等，一般称之为xDSL。它们主要的区别就是体现在信号传输速度和距离的不同以及上行速率和下行速率对称性的不同这两个方面 Digital Camera Digital Camera HDTVHigh Definition TV PDP (Plasma Display)TV Home Theater DVD(Digital Video Disc) GPS(Global Position System) Cruise missile Smart bomb from F117 Pattern recognization Fingerprint distinguish Requirement of DSP Engineers is growing up rapidly Development of DSP Higher processing speed Multi-DSP co-operation More powerful and convenient development environment ASIC based on DSP core Lower price or higher performance price ratio Lower power consumption or longer battery life CONTENT 2.DISCRETE-TIME SIGNAL AND SYSTEMS 3.THE Z-TRANSFORM 4.SAMPLING OF CONTINUOUS-TIME SIGNALS 6.STRUCTURES FOR DISCRETE-TIME SYSTEMS 7.FILTER DESIGN TECHNIQUES 8.THE DISCRETE FOURIER TRANSFORM 9.COMPUTATION OF THE DISCRETE FOURIER APPENDIX B CONTINUOUS-TIME FILTERS 2 Discrete-Time Signals and Systems 2.0 INTRODUCTION The term signal is generally applied to something that conveys information. The