Digital Signal Processing A Computer-Based Approach, Second Edition数字信号处理基于计算机方法
电子类通信类和计算机类EI期刊(大部分免费)
电子类通信类和计算机类ei期刊（1）Multidimensional Systems and Signal Processing（2）Circuits, Systems and Signal Processing（3）Wireless Personal Communications（4）International Journal of Adaptive Control and Signal Processing（5）Journal of Signal Processing Systems（6）International Journal of Electronics and Communication（7）Journal of Circuits, Systems and Computers（8）Progress in Electromagnetics Research (PIER)（9）Canadian Journal of Electrical and Computer Engineering（10）ETRI Journal（11）IEEE Antennas and Wireless Propagation Letters（12）Signal, Image and Video Processing（13）Wireless Communicatiosn and Mobile Computings***（1）IET Radar Sonar and Navigation（2）IET Signal Processing（3）IET Communications（4）Signal Processing (Elsevier, EURASIP)（5）Eurasip Journal on Advances in Signal Processing (Hindawi)（6）Digital Signal Processing (A Review Journal)（7）IEEE Trans Circuits and Systems（8）IEICE Trans Communications/Fundamentals of Electronics, Communications and Computer Sciences（9）European Trans. Telecommunications（10）Annals of Telecommunications*****（1）IEEE Trans Communications（2）IEEE Trans Signal Processing（3）IEEE Trans Antennas and Propagation（4）IEEE Trans Aerospace and Electronic Systems（5）Electronics Letters（6）IEEE Signal Processing Letters（7）IEEE Communications Letters（8）Radio Science大部分免费------------------------------IEEE communication letter 和electronic letter相对容易IEICE的影响因子太低了，而且版面费出奇的贵，怎么能和IEEE混在一起。
数字信号处理Digital Signal Processing(DSP)
• 经过A/D变换器后，不但时间离散化了，幅度也量化 了，这种信号称为数字信号。用x(n)表示。
例子
• 如4位码，只能表示24=16种不同的信号幅度， 这些幅度称为量化电平。
• 当离散时间信号幅度与量化电平不相同时， 就要以最接近的一个量化电平来近似它。
（7）估计理论，包括功率谱估计及相关函数 估计等。
（8）信号的压缩，包括语音信号与图象信号 的压缩
（9）信号的建模，包括AR，MA，ARMA， CAPON，PRONY等各种模型。
（10）其他特殊算法（同态处理、抽取与内 插、信号重建等）
（11）数字信号处理的实现。
（12) 数字信号处理的应用。
第一节 什么是数字信号处理 第二节 数字信号处理的实现 第三节 数字信号处理的应用领域 第四节 数字信号处理器
例：直流信号：仅用一个参量可以描述。阶跃信号：可用幅 度和时间两个参量描述。正弦波信号：可用幅度、频率和 相位三个参量来描述。
• 随机信号：若信号在任意时刻的取值不能精确确定，或 说取值是随机的，即它不能用有限的参量加以描述。也无 法对它的未来值确定性地预测。它只能通过统计学的方法 来描述(概率密度函数来描述)。
• 随着信息时代、数字世界的到来，数字信号处 理已成为一门极其重要的学科和技术领域。
（四）数字信号处理系统的基本组成
• 以下所讨论的是模拟信号的数字信号处理系统.
模拟 前置预 滤波器
xa(t)
PrF
x(n)
y(n)
A/D 变换器
数字信号 处理器
D/A 变换器
ADC
DSP
电子科技大学-彭启琮-DSP视频配套PPT-1
DSP Solution
Programmable switch
Mobile phone
The handset is not only used for voice communication
from a number of potential forms of error. With information in a digital or binary form, we
may easily build into the data stream additional “redundant” bits that are used to detect when an error has occurred.
Digital system：will show no variation
with temperature throughout their guaranteed operation range.
Why digital?
(4) Anti-noise
Why digital?
(5) Repeatability
Why digital?
（3）Stability
Analog system：the characteristics of
analog system components, resistors, capacitors and operational amplifiers will change along with temperature, humidity
Why digital?
dsp大学期末考试试题及答案
dsp大学期末考试试题及答案一、选择题（每题2分，共20分）1. DSP（数字信号处理）的全称是什么？A. Digital Signal ProcessingB. Digital Sound ProcessingC. Data Signal ProcessingD. Digital Storage Processing答案：A2. 在DSP系统中，以下哪个不是数字滤波器的类型？A. 低通滤波器B. 高通滤波器C. 带通滤波器D. 线性滤波器答案：D3. 下列哪个算法不是用于数字信号处理的？A. FFT（快速傅里叶变换）B. DCT（离散余弦变换）C. JPEG（联合图像专家组）D. MDCT（修改离散余弦变换）答案：C4. 在DSP中，以下哪个是用于实现信号采样的设备？A. ADC（模数转换器）B. DAC（数模转换器）C. CPLD（复杂可编程逻辑器件）D. FPGA（现场可编程门阵列）答案：A5. 下列哪个参数不是描述数字信号的？A. 幅度B. 频率C. 相位D. 电阻答案：D6. 在DSP中，以下哪个指标用于衡量信号的频域特性？A. 幅度谱B. 相位谱C. 功率谱D. 所有选项答案：D7. 下列哪个选项不是DSP系统设计的关键考虑因素？A. 处理速度B. 内存容量C. 电源电压D. 信号带宽答案：C8. 在DSP编程中，以下哪个不是常用的编程语言？A. C语言B. C++语言C. MATLABD. VHDL答案：C9. 下列哪个不是DSP系统的应用领域？A. 音频处理B. 图像处理C. 无线通信D. 机械制造答案：D10. 在DSP系统中，以下哪个是用于实现信号放大的组件？A. 运算放大器B. 滤波器C. 调制器D. 编码器答案：A二、填空题（每题2分，共20分）1. DSP技术在______和______处理中具有广泛应用。
答案：数字信号；模拟信号2. 一个典型的DSP系统包括______、______和______。
数字信号课程设计—钢琴琴键声音合成
洛阳理工学院课程设计报告课程名称数字信号处理设计题目钢琴琴键声音合成专业通信工程班级B100509学号B********姓名周东煜完成日期2013年5月28日课程设计任务书设计题目：钢琴琴键声音合成设计内容与要求：钢琴声音优美号称“乐器之王”，据研究发现钢琴的声音是若干基本频率的倍频合成的。
弹奏钢琴产生16个音符，分别是“Do/Re/Mi/Fa/So/La/Si/Do(高)/Do(高)/Si/La/So/Fa/Mi/Re/Do”，对此信号进行STFT对此信号进行STFT，时频谱如图所示根据上述论述题目的基本要求如下：（1）找到Do/Re/Mi/Fa/So/La/Si/Do(高)的基频；（2）找出基频与倍频之间能量比率的关系；（3）编写函数，用正弦波来合成钢琴的声音。
指导教师：王新新2013年5 月27 日课程设计评语成绩：指导教师：2013年月日摘要目前，随着科技的不断发展，音频信号处理技术也发展异常迅猛，并且数字信号处理已成为主流。
运用计算机来处理数字信号，这就使得数字信号的处理速度非常快，这也是数字信号处理技术发展迅猛的主要原因。
将各种各样的音频信号转换为数字信号之后我们就可以快速而轻松的对这些音频信号进行处理了。
在这方面，早已出现如语音识别软件的各种关于音频信号处理的软件，随着计算机技术的持续发展，计算机运算速度的大幅提高，音频处理软件的处理能力越来越强。
以语音识别软件为例，现在的语音识别软件的识别准确度越来越高，识别速度越来越快，而今，我们运用的软件是matlab软件，这都主要归功于数字信号处理技术的发展。
所以说，用数字信号处理音频信号的发展前景非常广阔。
那么，我们就有理由选用数字信号处理的方法处理类似于钢琴音的音频信号。
钢琴声音优美，号称“乐器之王”，据研究发现钢琴的声音是若干基本频率的倍频合成的。
弹奏钢琴产生16个音符，分别是“Do/Re/Mi/Fa/So/La/Si/Do(高)/ Do(高)/Si/La/So/Fa/Mi/Re/Do”关键词：Matlab、电子琴、数字信号abstractAt present, with the continuous development of science and technology, audio signal processing technology and development of abnormal rapidly, and digital signal processing has become the mainstream. Use computer to deal with digital signal, which makes very fast digital signal processing, digital signal processing technology which is developing rapidly. Convert all kinds of audio signal to digital signal after, we can quickly and easily for the audio signal processing. In this respect, have appeared such as voice recognition software on audio signal processing software, with the continued development of computer technology, the computer operation speed increase, audio processing software processing power is more and more strong. V oice recognition software, for example, is now the voice recognition software is more and more high recognition accuracy, and speed faster and faster, but now, we use the software matlab software, this is mainly due to the development of digital signal processing technology. So, with the development of digital signal processing audio signal prospects are very broad. So, we have reasons to use digital signal processing method of similar steel sound audio signal processing.A beautiful piano sound, so-called \"the king of instruments\", according to research finds the sound of the piano is a number of basic frequency times frequency synthesis. Respectively, playing the piano have 16 notes, is \"Do Re Mi/Fa/So/La/Si/Do (high)/Do (high)/Si/La/So/Fa/Mi/Re/Do\"Key word: Matlab, electric piano, digital signa目录第一章系统运行环境 (4)1.1、MATLAB开发环境简介 (4)1.2 硬件环境 (5)第二章系统内容设计 (6)2.1、钢琴琴键合成原理 (6)2.2、总体结构图 (7)2.3、钢琴信号的时频分析 (8)2.4对时频谱进行分析 (10)第三章实验结果及其分析 (11)3.1、钢琴信号的合成 (12)3.2实验结果 (13)实验总结 (14)第一章系统运行环境1.1、MATLAB开发环境简介分析以及合成声音所需软件环境------MATLABMATLAB是矩阵实验室（Matrix Laboratory）的简称，是美国MathWorks公司出品的商业数学软件，用于算法开发、数据可视化、数据分析以及数值计算的高级技术计算语言和交互式环境，主要包括MATLAB和Simulink两大部分。
综合专业英语试题
专业英语试题一、词语翻译1.Electromagnetic induction 电磁感应2.Broadcasting 广播3.发射机Transmitter4.Encoder 编码器5.光电阴极Photocathode6.像素Pixel7.Harmonic structure 谐波结构8.多路器Mutiplexer9.电离层Ionosphere10.Deterministic 确定的11.功率谱密度power clensity spectrum12.信噪比signal-to-noise ratio13.Demodulation 解调，检波14.Nonlinear 非线性的15.Vacuum-tube 真空（电子）管16.Modulation coefficient 调制系数17.Upper side frequency 上边频18.调制信号modulation signal19.直流电源DC power suply20.Quadrature 正交21.振荡器resonator22.Inversion 倒置23.差分difference24.Cascade 串联，级联25.Deemphasis 去加重1.field-effect 场效应管2.oscilloscope 示波器rmation 信息，消息，情报4.optical fiber 光纤5. signal-to-noise 信噪比6.bandwidth 基带7.vocal tract 声带8.bipolar 双极（线）的9.decoder 解（译）码器10.Fourier series 傅里叶级数11.decibel 分贝12.modulation 调制，调节13.amplifier 放大器，扩音机14. transformer 变压器15.resonator 振荡器16.prescribe 指示，规定17.difference差分，差别18.frequency modulation调频19.frequency divider分频器20.viewpoint 观点21.impurity杂质，混合物22.nanometers纳米23.packaging封装24.very large integration 超大规模集成电路25.digital signal processing数字信号处理26. baseband 基带27.binary二进制编码28.mainframe 主机，大型机29.electronic mail电子邮件30.mobile telephone service移动电话业务二、英译汉1.A serial link is often used to attach a computer to a modem.答案：串口通常用来将计算机和调制解调器连接起来。
南邮DSP期末复习课试卷
DTFT
连续周期频谱 X ( e j )
内 插
有限长离散时间信号 y[n]
DFT
2 0 ~ 2 ,间隔 N 频域采样
有限长离散谱线
Y (k )
第五章 重点
DFT的定义、性质及其证明 循环卷积与线性卷积的关系 实序列的DFT 线性卷积的DFT实现 重叠相加法
Let ga(t) be a band-limited signal with CTFT Ga(j)=0 for | |> m Then ga(t) is uniquely determined by its samples ga(nT) , -n, if T 2 m where T=2/T
连续时间信号 x(t)
内 插 时域采样
FT
连续频谱 X(jΩ)
周期延拓
离散时间信号 x(n)
周期延拓 取主值区间
DTFT
连续周期频谱 X ( e j )
内 插
有限长离散时间信号 y[n]
DFT
2 0 ~ 2 ,间隔 N 频域采样
有限长离散谱线
Y (k )
Sampling the DTFT
Sampling the DTFT
n
x[n]
实偶——实偶
实奇——虚奇
Commonly Used DTFT Pairs
Sequence DTFT
[ n] 1
1 e
jo n
k
2( 2 k) 2( o 2 k)
1 [ n] ( 2 k) j 1 e k 1 n [ n], ( 1) 1 e j
DigitalSignalProcessing(1Introduction)-讲义
DigitalSignalProcessing(1Introduction)-讲义About The CourseDigital Signal Processing SCUT Lecture 1 IntroductionIntroduction on DSP A/D D/A Conversion BibliographyTextbook: A.V. Oppenheim, R.W. Schafer, J.R. Buck, Discrete-time Signal Processing, Second Edition. Prentice Hall, 1999. Tsinghua University Press, 20XX年. References: S. K.Mitra, Digital Signal Processing: A Computer-based Approach, Second Edition. Mcgraw-hill, 20XX年. Tsinghua University Press, 20XX年. 程佩青编,《数字信号处理教程》(第二版),清华大学出版社, 20XX年SCUTSCUTDigital Signal Processing, 20XX年, Y.ZengYan Zeng South China University of Technology 20XX年SCUT第1页Digital Signal Processing, 20XX年, Y.Zeng第2页About The Course Instructor: Yan Zeng,C Phone: 8711 4480 (H), 189 **** ****C Office: Building#18 (412)C E-Mail: yzeng@, zengyan.gz@C E-Mail for submitting reports: scutoptics@ Grading PolicyCExercises and Reports: 20%CFinal exam: 80% Exercises and Reports: There are proper exercises, homeworks or reports every week, which must be delivered on every Wednesday.Digital Signal Processing, 20XX年, Y.Zeng第3页About The CourseSCUT眼界决定境界，视野决定胸怀，行动决定命运！广泛阅读，善于思考，勤于实践！仰望星空，脚踏实地！SCUTI will give you many careful and trenchant discussion on DSP theories, methods and a wild view to modern science and technoloty. Wish you have a great journey in the course!SCUTSCUTDigital Signal Processing, 20XX年, Y.Zeng第4页Chapter 1 Introduction Background Aim Motivation What is DSP Characteristics of DSP Basic Framework Main Application and Some Examples Sampling and Quantization( A/D D/A Conversion)1.1 BackgroundSCUT建安24年(公元219年)腊月，曹操与华佗。
电子信息工程专业专业英语考卷
电子信息工程专业《专业英语》课程期末考试试题专业、班级：姓名：学号：共 6 页第 1 页三、根据英文缩写写出中文含义（每题 0.5 分，二十个小题，共 10 分）1). CDMA2). ALU3). DAS4). HLL5). SCR6). I/O7). MIPS8). MMX9). DCS10). HDD11). PLA12). VSWR13). DC14). FDM15). GBW16). TDM17). IP18). DCT19). MRI20). PCM四、将下列句子翻译为中文（每题 2 分，五个小题，共 10 分）1). At present, the state of most semiconductor device technology is such that the device design and process technology must be supplemented by screening and inspection procedures, if ultimate device reliability is to be obtained and controlled．2). The converter is essentially a highly over –sampling 1-bit ADC (the comparator) followed by digital filtering and decimation to realize the processing gain. The effective performance of the converter is greatly enhanced by the addition of circuitry to shape the quantization noise such that, instead of being uniformly spread throughout the 0 to fs/2 band, it is minimized in the band of interest.3). Although the individual integrated circuits might cost as little as 10 cents each, the cost of designing the printed circuit board for such a system and the cost of assembling the board are very significant and this design style is no longer cost-effective.4). Rather than just matching the abilities of the human ear, these systems are designed to exceed the limits of hearing. It's the only way to be sure that the reprod uced music is pristine.5). In the case that the object types in a video sequence belong to known object classes, knowledge-based coding can be employed, which uses a wireframe specially designed to describe the recognized object type. Several approaches have been developed to code human heads using predefined wireframes. Using a predefined wireframe increases coding efficiency because it is adapted to the shape of the object. Sometimes. this technique is also referred to as model based coding.五、将下列句子翻译为相应的英文（每题 3 分，五个小题，共 30 分)1). 在测量应用中，选择合适的探头是获得最佳信号保真度的关键。
电子信息工程专业专业英语考卷
电子信息工程专业《专业英语》课程期末考试试题专业、班级：姓名：学号：共 6 页第 1 页三、根据英文缩写写出中文含义（每题 0.5 分，二十个小题，共 10 分）1). CDMA2). ALU3). DAS4). HLL5). SCR6). I/O7). MIPS8). MMX9). DCS10). HDD11). PLA12). VSWR13). DC14). FDM15). GBW16). TDM17). IP18). DCT19). MRI20). PCM四、将下列句子翻译为中文（每题 2 分，五个小题，共 10 分）1). At present, the state of most semiconductor device technology is such that the device design and process technology must be supplemented by screening and inspection procedures, if ultimate device reliability is to be obtained and controlled．2). The converter is essentially a highly over –sampling 1-bit ADC (the comparator) followed by digital filtering and decimation to realize the processing gain. The effective performance of the converter is greatly enhanced by the addition of circuitry to shape the quantization noise such that, instead of being uniformly spread throughout the 0 to fs/2 band, it is minimized in the band of interest.3). Although the individual integrated circuits might cost as little as 10 cents each, the cost of designing the printed circuit board for such a system and the cost of assembling the board are very significant and this design style is no longer cost-effective.4). Rather than just matching the abilities of the human ear, these systems are designed to exceed the limits of hearing. It's the only way to be sure that the reprod uced music is pristine.5). In the case that the object types in a video sequence belong to known object classes, knowledge-based coding can be employed, which uses a wireframe specially designed to describe the recognized object type. Several approaches have been developed to code human heads using predefined wireframes. Using a predefined wireframe increases coding efficiency because it is adapted to the shape of the object. Sometimes. this technique is also referred to as model based coding.五、将下列句子翻译为相应的英文（每题 3 分，五个小题，共 30 分)1). 在测量应用中，选择合适的探头是获得最佳信号保真度的关键。
《计算机英语》 司爱侠,人民邮电出版社答案-推荐下载
Text A I. Complete the following sentences according to the information in the text.1. programmable, analog, digital2. continuous, discrete3. billing, shipping, receiving, inventory control4. computations, MPU, CPU5. Complex Instruction Set Computer6. Digital Signal Processing7. integer, logic8. buses, pulses,9. Random Access Memory, internal10. keyboards, mouse, monitors, printersII. Translate the following terms and phrases into Chinese.1.external devices 1.外部设备2.output device 2.输出设备3.parallel device 3.并行设备4.assembly language 4.汇编语言5.block device 5.块设备6.floating point 6.浮点7.data stream7.数据流8.input device8.输入设备9.integrated circuit9.集成电路10 .main storage10.主存III. Translate the following terms and phrases into English.缩写完整形式中文意义1.ALU Arithmetic/Logic Unit运算器2.CPU Central Processing Unit或Central Processor Unit中央处理器3.CISC Complex Instruction SetComputer 复杂指令集计算机4.DSP Digital Signal Processing数字信号处理5.EPROM Erasable Programmable ReadOnly Memory 可擦可编程只读存储器6.LED light-emitting diode发光二级管7.MODEMMOdulator, DEModulator调制解调器8.RAM Random Access Memory随机访问存储器9.ROM Read Only Memory只读存储器10 .RISC Reduced Instruction SetComputer精简指令集计算机IV. Fill in the gaps with the words or phrases chosen from the box. Change the forms where necessary.1. instructions 2. devices 3. concept 4. consuming 5. integrated circuits6. space7. fit into8. Information Age9. embedded computer 10. controlV. Translate the following passage into Chinese.计算机能够储存和执行被叫做程序的许多指令，这使其非常通用并不同于计算器。
数字信号处理 英文 教材
数字信号处理英文教材
数字信号处理是一门涉及数学、工程学和计算机科学的学科，其英文教材有很多，以下是一些经典的数字信号处理英文教材：
1. "Digital Signal Processing" by John G. Proakis and Masoud Salehi
2. "Digital Signal Processing: Principles, Algorithms, and Applications" by Robert J. Schroeder and Ray P. Kailath
3. "Digital Signal Processing: A Practical Guide for Applications Engineers" by Robert A. Monzingo and John W. Cocke
4. "Digital Signal Processing: A Computer-Based Approach" by John
G. Proakis and Dimitris G. Manolakis
5. "Digital Signal Processing: Theory, Algorithms, and Practicalities" by John G. Proakis and Gilbert H. Walker
这些教材都是非常经典的数字信号处理教材，被广泛应用于数字信号处理领域。
它们涵盖了数字信号处理的基本概念、原理、算法和应用，适合初学者和有一定基础的读者。
信息科学与电子工程专业英语课后答案
U n i t1E x e r c i s e s(1)T r a n s l a t e t h e f o l l o w i n g s e n t e n c e s i n t o C h i n e s e.1.As with series resonance, the greater the resistance in thecircuit the lower the Q and, accordingly, the flatter andbroader the resonance curve of either line current or circuitimpedance.对于串联谐振，电路中的电阻愈大Q值就愈低，相应地线路电流或电路阻抗的谐振曲线也就愈平、愈宽。
2.A wire carrying a current looks exactly the same and weighsexactly the same as it does when it is not carrying a current.一根带电的导线其外表与重量都与不带电导线完全一样。
3.Click mouse on the waveform and drag it to change the pulserepetition rate, or directly enter a new value of the period inthe provided dialogue box, while keeping the pulse widthunchanged.在波形上点击鼠标并拖动来改变脉冲重复频率，或者在提供的对话框中直接输入新的期值，而保持脉冲宽度不变。
4.Electronics is the science and the technology of the passage of charged particles in a gas, in a vacuum, or in a semiconductor. Please note that particle motion confined within a metal only is not considered electronics.电子学是一门有关带电粒子在气体、真空或半导体中运动的科学技术。
数字信号处理-基于计算机的方法(第四版)答案8-11章(20161119181250)
6
+(1-
5 -2 z 4
+
1 -4 z )Y( z2 ) 4
+
2 3
( z- 1
+ z- 2 -
1 -3 z 4
-
1 -4 z )Y(z3) 4
+ + +
1 24 1 12 1
Y(z0) + Y( z0 ) +
1 6
2 3 1 6
Y(z1) Y(z1 ) 1 4
5 4 1 6
Y(z2 ) +
2 3 1
D = 3〈 3 〉 4 = 3. k=〈 4 k1 + 3k2 〉 12 ,
-1
Thus, n = 〈 4 n1 + 3n 2 〉 12 ,
0 ≤k1 ≤2, 0 ≤k2 ≤3.
0 ≤n 1 ≤2, 0 ≤n 2 ≤3,
The corresponding index mappings are indicated below:
From Eqs. (6.114) and (6.115), we arrive at I 0 (z) I1 ( z) I 2 (z) Y( z) = Y( z0 ) + Y(z1) + Y( z2 ) + I 0 (z0 ) I1 (z1) I 2 ( z2 ) where I 0 (z) = (1 - z1 z- 1)(1- z2 z- 1 )(1- z3z- 1 )(1 - z4 z- 1 ), I 1( z) = (1- z0 z- 1)(1I 2 (z) = (1 - z0 z- 1)(1 z2 z- 1 )(1- z3z- 1 )(1 - z4 z- 1 ), z1 z- 1 )(1- z3z- 1 )(1 - z4 z- 1 ),
Digital Signal Processing
Digital Signal Processing Digital signal processing (DSP) is a multifaceted field that involves the manipulation and analysis of signals that are represented in a digital format. These signals, often originating from real-world phenomena, are converted into a sequence of numbers that can be processed by computers or specialized digital signal processors. DSP finds applications in a wide array of domains, including telecommunications, audio processing, image and video processing, biomedical engineering, and radar systems, among others. At the heart of DSP lie several fundamental concepts and techniques. Sampling is the process of converting a continuous-time signal into a discrete-time signal by taking periodic measurements of the signal's amplitude. Quantization, on the other hand, involves representing the sampled values using a finite number of bits, introducing a degree of approximation into the digital representation. These discrete-time, quantized signals can then be manipulated using various mathematical operations, including convolution, Fourier analysis, and filtering. Filtering is a crucial operation in DSP, enabling the selective removal or enhancement of specific frequency components within a signal. Different types of filters, such as low-pass, high-pass, band-pass, and band-stop filters, serve distinct purposes in tailoring the frequency characteristics of a signal. For instance, a low-pass filter can be employed to remove high-frequency noise from an audio signal, while a band-pass filter might be used to isolate a particular frequency band in a communication system. The implementation of DSP algorithms can be accomplished using various hardware and software platforms. Dedicated digital signal processors (DSPs) are specifically designed for real-time signal processing tasks, offering high performance and optimized architectures for executing DSP algorithms efficiently. General-purpose processors, such as CPUs and GPUs, can also be used for DSP,albeit with potentially lower performance compared to specialized DSPs. Software tools, such as MATLAB and Python libraries, provide a flexible environment for developing, simulating, and analyzing DSP algorithms. The advancements in DSP technology have revolutionized numerous fields. In telecommunications, DSP enables efficient encoding, decoding, and transmission of signals over various channels, facilitating the development of mobile phone networks, satellite communicationsystems, and high-speed internet access. Audio processing heavily relies on DSPfor tasks like noise reduction, echo cancellation, equalization, and audio compression, enhancing the quality of music recordings, voice communication, and sound effects in multimedia applications. Image and video processing leverage DSP for tasks such as image enhancement, compression, object recognition, and video stabilization, contributing to advancements in digital photography, medical imaging, video surveillance, and computer vision. The field of biomedical engineering utilizes DSP for analyzing physiological signals like electrocardiograms (ECGs), electroencephalograms (EEGs), and electromyograms (EMGs), aiding in medical diagnosis, monitoring, and treatment. Radar systems rely on DSP for tasks like target detection, tracking, and imaging, playing a crucial role in aviation, weather forecasting, and military applications. These examples merely scratch the surface of the vast and ever-expanding applications of DSP in shaping our technological landscape.。
数字信号处理DigitalSignalProcessing
9
2. 基本组成
模拟信 号
连续时间信 号
数字信号
采样 保持器
A/D 变换器
通用或专 用
计算机
连续时间信 模 拟 信
号
号
D/ A 变换器模拟低通 滤ຫໍສະໝຸດ 器数字信号处理系统10
11
12
3. 实现方法（软硬兼有）
▪ (1) 在通用的计算机（如PC机）上用软件（如Fortran、C
14
4. 数字信号处理特点
▪ 精度高：在模拟系统的电路中，元器件精度要达
到10-3以上已经不容易了，而数字系统17位字长 可以达到10-5的精度，这是很平常的。例如，基 于离散傅里叶变换的数字式频谱分析仪，其幅值 精度和频率分辨率均远远高于模拟频谱分析仪。
▪ 灵活性强：数字信号处理采用了专用或通用的数字系
速发展的另一个标志，40年代～60年代中期，形成了完整 的理论基础（FIR & IIR）； ▪ 有限冲击响应（FIR－Finite Impulse Response）； ▪ 无限冲击响应（IIR－Infinite Impulse Response）；
▪ 三个著名的DSP实验室：
▪ Bell实验室、IBM的Watson实验室、MIT的Lincoln实验 室。
▪ 可以实现多维信号处理：利用庞大的存储单元，可以
存储二维的图像信号或多维的阵列信号，实现二维或多维 的滤波及谱分析等。
16
▪ 缺点1：增加了系统的复杂性，它需要模拟
接口以及比较复杂的数字系统；
▪ 缺点2：应用的频范围受到限制，主要是
A/D转换的采样频率的限制；
▪ 缺点3：系统的功率消耗比较大。数字信号
数字信号处理DiscreteTimeSignalProcessing
Device）
复杂可编程逻辑器件
4．Embedded Processor 嵌入式处理器
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应用领域
数字信号处理是应用最快、成效最为显著的 新学科之一。在语音、雷达、声纳、地震、图像、 通信系统、系统控制、生物医学工程、机械振动、 遥感遥测、地质勘探、航空航天、电力系统、故障 检测、自动化仪器等众多领域都获得了极其广泛的 应用，它有效地推动了众多工程技术领域的技术改 造和学科发展。近年来，随着多媒体的发展， DSP芯片已在家电、电话、磁盘机等设备中广泛 应用。毫不夸张地说，只要你使用计算机(通用机、 专用机、单板机、单片机或一个简单的CPU)和数 据打交道，就必然要应用数字信号处理技术。
(1) 在通用微机上，用软件实现; (2) 用单片机实现; (3) 专用数字信号处理芯片DSP。
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五. 数字信号处理系统的基本组成
1. 框图
xa (t) 前置预滤波器
A/D变换器 x(n) 数字信号处理器
y(n) D/A变换器 y(t) 模拟滤波器 ya (t)
' xa (t)
01 3 5 t
7. 便于二维与多维处理 用存储一帧或数帧图象信号，实现二、多维 处理。
8. 速度不够高，工作频率也不够高 几十MHz以下。
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技术发展趋势 可用四个字“多快好省”来概括。 1．多，DSP的型号越来越多； 2．快，即运算的速度越来越快； 3．好，主要是指性能价格比； 4．省，功耗越来越低。
2. 要求基础强
网络理论、信号与系统是本课程的理论基础。
3. 与其它学科密切相连
与最优控制、通信理论、故障诊断、计算机、 微电子技术不可分，又是人工智能、模式识别、 神经网络等新兴学科的理论基础之一。
Artech House, 1999.
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7. Page 139, line 3, Example 3.14: Replace "x[n]" with "{x[n]}", and " π k/4" with "2π k/4". 8. Page 139, line 6 from bottom: Replace "y[n] = {4 6 2 "{y[n]} = {4 6 2 3} ". 3 4 6} " with
2. Page 121, Line 5 below Eq. (3.9): Replace " 3. Page 125, Eq. (3.16): Delete the stray α .
n =0
∑
∞
α n " with "
n =0
∑
∞
α n ".
4. Page 138, line 2 below Eq. (3.48): Replace "frequency response" with "discrete-time Fourier transform". 5. Page 139, Eq. (3.53): Replace "x(n + mN)" with "x[n + mN]". 6. Page 139, lin2 2, Example 3.14: Replace "x[n] = {0 1 2 "{x[n]} = {0 1 2 3 4 5} ". 3 4 5} " with
1 2 1 2
n =0
∑
∞
α n " with "
Байду номын сангаас
n =0
∑
∞
α n ".
n n n 10. Page 81, Eq. (2.88): Replace " α L + 1λn 2 + α N λ N − L " with " α L + 1λ 2 + L + α N λ N − L ".
11. Page 93, Eq. (2.116): Replace the lower limit "n=–M+1" on all summation signs with "n=0". 12. Page 100, line below Eq. (2.140) and caption of Figure 2.38: Replace "ω o = 0.03 " with " ω o = 0.06 π ". 13. Page 110, Problem 2.44: Replace "{y[ n]} = {− 1, − 1, 11, − 3, − 10, 20, −16} " with "{y[ n]} = {− 1, − 1, 11, − 3, 30, 28, 48} ", and "{y[ n]} = {− 14 − j5, − 3 − j17, − 2 + j 5, − 26 + j 22, 9 + j12} " with "{y[ n]} = {− 14 − j5, − 3 − j17, − 2 + j 5, − 9.73 + j12.5, 5.8 + j5.67} ". 14. Page 116, Exercise M2.15: Replace "randn" with "rand". Chapter 3 1. Page 118, line 10 below Eq. (3.4): Replace "real" with "even". 1
n =−∞
∑
−1
α n z −n " with " −
n = −∞
∑
−1
α n z− n ".
13. Page 165, line 4 above Eq. (3.125); Replace "0.0667" with "0.6667". 14. Page 165, line 3 above Eq. (3.125): Replace "10.0000" with "1.000", and "20.0000" with "2.0000". 15. Page 165, line above Eq. (3.125): Replace "0.0667" with "0.6667", "10.0" with "1.0", and "20.0" with "2.0". 16. Page 165, Eq. (3.125): Replace "0.667" with "0.6667". 17. Page 168, line below Eq. (3.132): Replace " z > λ l " with " z > λ l ". 18. Page 176, line below Eq. (3.143): Replace " R h " with "1/ R h ". 19. Page 182, Problem 3.18: Replace " X(e − j ω /2 ) " with " X( −e j ω /2 ) ".
Errata List of "Digital Signal Processing: A Computer-Based Approach", Second Edition Chapter 2 1. Page 48, Eq. (2.17): Replace "y[n]" with " x u [n]". 2. Page, 51: Eq. (2.24a): Delete " (x[n] + x * [N − n]) ". Eq. (2.24b): Delete " (x[n] − x * [N − n]) ". 3. Page 59, Line 5 from top and line 2 from bottom: Replace " − cos((ω1 + ω 2 − π )n ) " with "cos((2 π – ω1 – ω 2 )n) ". 4. Page 61, Eq. (2.52): Replace "A cos((Ω o + k ΩT )t + φ ) " with "A cos( ± (Ωo t + φ ) + k Ω Tt ) ". 5. Page 62, line 11 from bottom: Replace " Ω T > 2 Ω o " with " Ω T > 2 Ω o ". 6. Page 62, line 8 from bottom: Replace "2 πΩ o / ω T " with "2 πΩ o / ΩT ". 7. Page 65, Program 2_4, line 7: Replace "x = s + d;" with "x = s + d';". 8. Page 71, line 3 from top" Replace "δ[n – 4]" with "δ[n – 3]". 9. Page 79, line 5 below Eq. (2.76): Replace "
n→ ∞ z →∞
23. Page 193, Problem 3.100: Replace "
P(z) P(z) " with " −λ l ". D' (z) D' (z )
24. Page 194, Problem 3.106, Parts (b) and (d): Replace " z < α " with " z > 1 / α ". 25. page 199, Problem 3.128: Replace " (0.6)µ [n]" with " (0.6)n µ[n] ", and replace "(0.8)µ [ n] " with " (0.8)n µ[n]". 26. Page 199, Exercise M3.5: Delete "following". Chapter 4 1. Page 217, first line: Replace " ξ N " with " ξ M ". 2. Page 230, line 2 below Eq. (4.88): Replace " θ g (ω) " with " θ(ω )". 3. Page 236, line 2 below Eq. (4.109): Replace "decreases" with "increases". 4. Page 238, Eq. (4.114): Replace "2" outside the square brackets in the denomiantor with "4". 5. Page 241, line 3 from bottom: Replace " ω p " with " ω p = π / 2 ". 6. Page 241, line 2 from bottom: Replace " 0 ≤ k ≤ L − 1 " with "1 ≤ k ≤ L ". 7. Page 241, last line from bottom: Replace " ω o " with " ω o = π / 2 ". 8. Page 241, line 1 below Figure 4.24: Replace "0 ≤ k ≤ L − 1 " with "1 ≤ k ≤ L ". 9. Page 246, line 4 below Eq. (4.132): Replace " θ c (e jω )" with " θ c (ω )". 10. Page 265, Eq. (4.202): Replace "1,2,K,3" with "1,2,3". 11. Page 279, Problem 4.18: Replace " H(e j0 ) " with " H(e jπ / 4 ) ". 12. Page 286, Problem 4.71: Replace "z 3 = − j 0.3" with "z 3 = − 0.3 ".