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Understanding Digital Signal Processing 3rd.pdf

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非常经典 的外国的dsp书籍,全英文

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Understanding Digital Signal Processing Third Edition Richard G Lyons Upper Saddle River NJ Boston Indianapolis San Francisco New York Toronto Montreal London Munich Paris Madrid Capetown Sydney Tokyo Singapore Mexico City Preface This book is an expansion of previous editions of Understanding Digital Signal Processing Like those earlier editions its goals are 1 to help beginning students understand the theory of digital signal processing DSP and 2 to provide practical DSP infor......

Understanding Digital Signal Processing Third Edition Richard G. Lyons Upper Saddle River, NJ • Boston • Indianapolis • San Francisco New York • Toronto • Montreal • London • Munich • Paris • Madrid Capetown • Sydney • Tokyo • Singapore • Mexico City Preface This book is an expansion of previous editions of Understanding Digital Signal Processing. Like those earlier editions, its goals are (1) to help beginning students understand the theory of digital signal processing (DSP) and (2) to provide practical DSP information, not found in other books, to help working engineers/scientists design and test their signal processing systems. Each chapter of this book contains new information beyond that provided in earlier editions. It’s traditional at this point in the preface of a DSP textbook for the author to tell readers why they should learn DSP. I don’t need to tell you how important DSP is in our modern engineering world. You already know that. I’ll just say that the future of electronics is DSP, and with this book you will not be left behind. For Instructors This third edition is appropriate as the text for a one- or two-semester undergraduate course in DSP. It follows the DSP material I cover in my corporate training activities and a signal processing course I taught at the University of California Santa Cruz Extension. To aid students in their efforts to learn DSP, this third edition provides additional explanations and examples to increase its tutorial value. To test a student’s understanding of the material, homework problems have been included at the end of each chapter. (For qualified instructors, a Solutions Manual is available from Prentice Hall.) For Practicing Engineers To help working DSP engineers, the changes in this third edition include, but are not limited to, the following: • Practical guidance in building discrete differentiators, integrators, and matched filters • Descriptions of statistical measures of signals, variance reduction by way of averaging, and techniques for computing real-world signal-to-noise ratios (SNRs) • A significantly expanded chapter on sample rate conversion (multirate systems) and its associated filtering • Implementing fast convolution (FIR filtering in the frequency domain) • IIR filter scaling • Enhanced material covering techniques for analyzing the behavior and performance of digital filters • Expanded descriptions of industry-standard binary number formats used in modern processing systems • Numerous additions to the popular “ Digital Signal Processing Tricks” chapter For Students Learning the fundamentals, and how to speak the language, of digital signal processing does not require profound analytical skills or an extensive background in mathematics. All you need is a little experience with elementary algebra, knowledge of what a sinewave is, this book, and enthusiasm. This may sound hard to believe, particularly if you’ve just flipped through the pages of this book and seen figures and equations that look rather complicated. The content here, you say, looks suspiciously like material in technical journals and textbooks whose meaning has eluded you in the past. Well, this is not just another book on digital signal processing. In this book I provide a gentle, but thorough, explanation of the theory and practice of DSP. The text is not written so that you may understand the material, but so that you must understand the material. I’ve attempted to avoid the traditional instructor–student relationship and have tried to make reading this book seem like talking to a friend while walking in the park. I’ve used just enough mathematics to help you develop a fundamental understanding of DSP theory and have illustrated that theory with practical examples. I have designed the homework problems to be more than mere exercises that assign values to variables for the student to plug into some equation in order to compute a result. Instead, the homework problems are designed to be as educational as possible in the sense of expanding on and enabling further investigation of specific aspects of DSP topics covered in the text. Stated differently, the homework problems are not designed to induce “death by algebra,” but rather to improve your understanding of DSP. Solving the problems helps you become proactive in your own DSP education instead of merely being an inactive recipient of DSP information. The Journey Learning digital signal processing is not something you accomplish; it’s a journey you take. When you gain an understanding of one topic, questions arise that cause you to investigate some other facet of digital signal processing. † Armed with more knowledge, you’re likely to begin exploring further aspects of digital signal processing much like those shown in the diagram on page xviii. This book is your tour guide during the first steps of your journey. †“You see I went on with this research just the way it led me. This is the only way I ever heard of research going. I asked a question, devised some method of getting an answer, and got—a fresh question. Was this possible, or that possible? You cannot imagine what this means to an investigator, what an intellectual passion grows upon him. You cannot imagine the strange colourless delight of these intellectual desires” (Dr. Moreau—infamous physician and vivisectionist from H.G. Wells’ Island of Dr. Moreau, 1896). You don’t need a computer to learn the material in this book, but it would certainly help. DSP simulation software allows the beginner to verify signal processing theory through the time-tested trial and error process.‡ In particular, software routines that plot signal data, perform the fast Fourier transforms, and analyze digital filters would be very useful. ‡“One must learn by doing the thing; for though you think you know it, you have no certainty until you try it” (Sophocles, 496–406 B.C.). As you go through the material in this book, don’t be discouraged if your understanding comes slowly. As the Greek mathematician Menaechmus curtly remarked to Alexander the Great, when asked for a quick explanation of mathematics, “There is no royal road to mathematics.” Menaechmus was confident in telling Alexander the only way to learn mathematics is through careful study. The same applies to digital signal processing. Also, don’t worry if you need to read some of the material twice. While the concepts in this book are not as complicated as quantum physics, as mysterious as the lyrics of the song “Louie Louie,” or as puzzling as the assembly instructions of a metal shed, they can become a little involved. They deserve your thoughtful attention. So, go slowly and read the material twice if necessary; you’ll be glad you did. If you show persistence, to quote Susan B. Anthony, “Failure is impossible.” Coming Attractions Chapter 1 begins by establishing the notation used throughout the remainder of the book. In that chapter we introduce the concept of discrete signal sequences, show how they relate to continuous signals, and illustrate how those sequences can be depicted in both the time and frequency domains. In addition, Chapter 1 defines the operational symbols we’ll use to build our signal processing system block diagrams. We conclude that chapter with a brief introduction to the idea of linear systems and see why linearity enables us to use a number of powerful mathematical tools in our analysis. Chapter 2 introduces the most frequently misunderstood process in digital signal processing, periodic sampling. Although the concept of sampling a continuous signal is not complicated, there are mathematical subtleties in the process that require thoughtful attention. Beginning gradually with simple examples of lowpass sampling, we then proceed to the interesting subject of bandpass sampling. Chapter 2 explains and quantifies the frequency-domain ambiguity (aliasing) associated with these important topics. Chapter 3 is devoted to one of the foremost topics in digital signal processing, the discrete Fourier transform (DFT) used for spectrum analysis. Coverage begins with detailed examples illustrating the important properties of the DFT and how to interpret DFT spectral results, progresses to the topic of windows used to reduce DFT leakage, and discusses the processing gain afforded by the DFT. The chapter concludes with a detailed discussion of the various forms of the transform of rectangular functions that the reader is likely to encounter in the literature. Chapter 4 covers the innovation that made the most profound impact on the field of digital signal processing, the fast Fourier transform (FFT). There we show the relationship of the popular radix 2 FFT to the DFT, quantify the powerful processing advantages gained by using the FFT, demonstrate why the FFT functions as it does, and present various FFT implementation structures. Chapter 4 also includes a list of recommendations to help the reader use the FFT in practice. Chapter 5 ushers in the subject of digital filtering. Beginning with a simple lowpass finite impulse response (FIR) filter example, we carefully progress through the analysis of that filter’s frequency-domain magnitude and phase response. Next, we learn how window functions affect, and can be used to design, FIR filters. The methods for converting lowpass FIR filter designs to bandpass and highpass digital filters are presented, and the popular Parks-McClellan (Remez) Exchange FIR filter design technique is introduced and illustrated by example. In that chapter we acquaint the reader with, and take the mystery out of, the process called convolution. Proceeding through several simple convolution examples, we conclude Chapter 5 with a discussion of the powerful convolution theorem and show why it’s so useful as a qualitative tool in understanding digital signal processing. Chapter 6 is devoted to a second class of digital filters, infinite impulse response (IIR) filters. In discussing several methods for the design of IIR filters, the reader is introduced to the powerful digital signal processing analysis tool called the z-transform. Because the z-transform is so closely related to the continuous Laplace transform, Chapter 6 starts by gently guiding the reader from the origin, through the properties, and on to the utility of the Laplace transform in preparation for learning the z-transform. We’ll see how IIR filters are designed and implemented, and why their performance is so different from that of FIR filters. To indicate under what conditions these filters should be used, the chapter concludes with a qualitative comparison of the key properties of FIR and IIR filters. Chapter 7 introduces specialized networks known as digital differentiators, integrators, and matched filters. In addition, this chapter covers two specialized digital filter types that have not received their deserved exposure in traditional DSP textbooks. Called interpolated FIR and frequency sampling filters, providing improved lowpass filtering computational efficiency, they belong in our arsenal of filter design techniques. Although these are FIR filters, their introduction is delayed to this chapter because familiarity with the z-transform (in Chapter 6) makes the properties of these filters easier to understand. Chapter 8 presents a detailed description of quadrature signals (also called complex signals). Because quadrature signal theory has become so important in recent years, in both signal analysis and digital communications implementations, it deserves its own chapter. Using three-dimensional illustrations, this chapter gives solid physical meaning to the mathematical notation, processing advantages, and use of quadrature signals. Special emphasis is given to quadrature sampling (also called complex down-conversion). Chapter 9 provides a mathematically gentle, but technically thorough, description of the Hilbert transform—a process used to generate a quadrature (complex) signal from a real signal. In this chapter we describe the properties, behavior, and design of practical Hilbert transformers. Chapter 10 presents an introduction to the fascinating and useful process of sample rate conversion (changing the effective sample rate of discrete data sequences through decimation or interpolation). Sample rate
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评论

r8shiwei
好书!只是排版不是很好
2020-02-15 03:38:18回复
hzlpyy
不错,书真的很不错,很有帮助。谢谢分享!
2019-11-27 16:12:10回复
bbc_winter
非常经典的DSP书,和一般的教课书相比,多了很多独特的视角和理解,让人有豁然开朗的感觉。
2019-09-21 09:30:49回复
木木爱学习
好书,很有帮助,谢谢分享。
2019-09-14 18:44:23回复
sun_rainbow
终于找到了,太好了!这本书非常经典,值得学习。
2019-09-10 16:20:01回复
3ABC
没得说,好书。
2018-03-09 12:40:57回复
dudulock
这么好的资源,居然没有人评论。我找了好长时间了。感谢。希望学DSP的同仁都看看这本书。为我们国家强大而不断奋斗。
2017-10-19 10:13:02回复
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