Chapter 3: DIFFERENTIAL ENCODING
|
|
- Caroline Dennis
- 6 years ago
- Views:
Transcription
1 Chapter 3: DIFFERENTIAL ENCODING Differential Encoding Eye Patterns Regenerative Receiver Bit Synchronizer Binary to Mary Conversion Huseyin Bilgekul Eeng360 Communication Systems I Department of Electrical and Electronic Engineering Eastern Mediterranean University Eeng360 1
2 Differential Coding System Differential encoding removes the problem of Unintentional Signal Inversion. Polarity of the differentially encoded signal may be inverted without affecting the decoded signal. Modulo-2 addition Exclusive OR I 1 I 2 Out e = d e d = e e n n n 1 n n n 1 Represents Modulo-2 adder (XOR) Eeng360 2
3 Encoding e Input sequence d n Encoded sequence e n Reference digit Decoding (with correct channel polarity) Receiver sequence (Correct polarity) n Example of Differential Coding = dn en 1 e n d n = en en 1 Decoded sequence ~ d n ~ ~ Decoding (with inverted channel polarity) Received sequence (Inverted polarity) e n d n Decoded sequence Decoded sequence is same whether there is inversion or not. EEE 360 3
4 Eye patterns The effects of channel filtering and channel noise can be seen by observing the received line code on an oscilloscope. Received Line Code Information from Eye Pattern Timing error Eye opening Sensitivity Slope of the open eye Noise Margin height of the eye opening Eeng360 4
5 Regenerative Repeater Regenerate a noise-free digital signal. Amplify and clean-up the signal periodically Increases the amplitude Produces a sample value Produces a high level o/p if sample value>v T Minimize the effect of channel noise & ISI Generates a clocking signal Eeng360 5
6 Synchronization Synchronization signals are clock-type signals necessary within a receiver for detection of data from the corrupted input signal. Digital communications need at least 3 types of synchronization signals. Bit Synchronization (Bit Synch.): To distinguish bit intervals. Frame Synchronization (Frame Synch.): To distinguish groups of bits. Carrier Synchronization: For bandpass signals with coherent detection. Sync signals are derived from Corrupted input signal. From a separate channel that transmits sync signals. Eeng360 6
7 Bit Synchronizer for NRZ Signals Derive the synch signal from the corrupted received signal. Used for unipolar NRZ signals. Synchronizer complexity depends on the line code used. Synchronizarion of RZ signals is easier since PSD has delta at f=r=1/t b. Bit synchronizer for NRZ signals is given below. Eeng360 7
8 Square-law Bit Synchronizer for NRZ Signals Square Law Device converts polar NRZ signal to unipolar RZ format. Unipolar RZ signals have delta in the PSD at f=r=1/t b. This frequency component can be obtained by filtering. Filtered sinusoidal is converted to clock pulses using a comparator. Eeng360 8
9 Binary-to-multilevel polar NRZ Signal Conversion Binary to multilevel conversion is used to reduce the bandwidth required by the binary signaling. Multiple bits (l number of bits) are converted into words having SYMBOL durations T s =lt b where the Symbol Rate or the BAUD Rate D=1/T s =1/lT b. The symbols are converted to a L level (L=2 l ) multilevel signal using a l-bit DAC. Note that now the Baud rate is reduced by l times the Bit rate R (D=R/l). Thus the bandwidth required is reduced by l times. T s : Symbol Duration L: Number of M ary levels T b : Bit Duration l: Bits per Symbol L=2l D=1/Ts=1/lT b =R/l B null =R/l Eeng360 9
10 Power Spectra for Multilevel Polar NRZ Signals (c) L = 8 = 2 3 Level Polar NRZ Waveform Out Eeng360 10
11 Spectral Efficiency The Spectral efficiency of a digital signal is given by, where R is the data rate and B is the bandwidth required. R ( Bit s) η = B Hz If limited BW is desired, then use a signaling technique that has high spectral efficiency. Maximum spectral efficiency (which is limited by channel noise) is given by the Shannon s Channel Capacity formula: C = = log 1+ B max 2 Spectral efficiency for multilevel signaling is η η = l S N ( bit s) Hz Eeng360 11
12 PSD of a multilevel polar NRZ waveform R ( k ) = I i = 1 ( a a n n + k ) i P i For k = R 0 8 ( 0) = ( ) i= 1 2 i a n P = 21 ( k) 0. For k 0, R = i 1 where P i = for all of 8 the eight possible values. Then the P ( ) PSD ( f ) 2 for w2 = + T s ω ( ) is 2 t F f ( 21 0) 3. For the rectangular pulse width 3T P multilevelnrz ( f ) sin lπft = K lπftb The null bandwidth is where the pulse width is Ts = Tb PSD for a multilevel polar NRZ signal: b 2 B b : where k is a constant null R = l P s (f) Multilevel signaling is used to reduce the BW of a digital signal = F(f) T s 2 k = R( k) e j2πkft s Eeng360 12
Comm 502: Communication Theory. Lecture 4. Line Coding M-ary PCM-Delta Modulation
Comm 502: Communication Theory Lecture 4 Line Coding M-ary PCM-Delta Modulation PCM Decoder PCM Waveform Types (Line Coding) Representation of binary sequence into the electrical signals that enter the
More informationChapter 5: Modulation Techniques. Abdullah Al-Meshal
Chapter 5: Modulation Techniques Abdullah Al-Meshal Introduction After encoding the binary data, the data is now ready to be transmitted through the physical channel In order to transmit the data in the
More informationDIGITAL COMMUNICATIONS SYSTEMS. MSc in Electronic Technologies and Communications
DIGITAL COMMUNICATIONS SYSTEMS MSc in Electronic Technologies and Communications Bandpass binary signalling The common techniques of bandpass binary signalling are: - On-off keying (OOK), also known as
More informationDepartment of Electronics & Communication Engineering LAB MANUAL SUBJECT: DIGITAL COMMUNICATION LABORATORY [ECE324] (Branch: ECE)
Department of Electronics & Communication Engineering LAB MANUAL SUBJECT: DIGITAL COMMUNICATION LABORATORY [ECE324] B.Tech Year 3 rd, Semester - 5 th (Branch: ECE) Version: 01 st August 2018 The LNM Institute
More informationChapter 2 Line Code Decoder
Chapter 2 Line Code Decoder 2-1: Curriculum Objectives 1. To understand the theory and applications of line code decoder. 2. To understand the decode theory and circuit structure of NRZ. 3. To understand
More informationUNIT TEST I Digital Communication
Time: 1 Hour Class: T.E. I & II Max. Marks: 30 Q.1) (a) A compact disc (CD) records audio signals digitally by using PCM. Assume the audio signal B.W. to be 15 khz. (I) Find Nyquist rate. (II) If the Nyquist
More informationDigital Communication (650533) CH 3 Pulse Modulation
Philadelphia University/Faculty of Engineering Communication and Electronics Engineering Digital Communication (650533) CH 3 Pulse Modulation Instructor: Eng. Nada Khatib Website: http://www.philadelphia.edu.jo/academics/nkhatib/
More informationObjectives. Presentation Outline. Digital Modulation Revision
Digital Modulation Revision Professor Richard Harris Objectives To identify the key points from the lecture material presented in the Digital Modulation section of this paper. What is in the examination
More informationComputer Networks - Xarxes de Computadors
Computer Networks - Xarxes de Computadors Outline Course Syllabus Unit 1: Introduction Unit 2. IP Networks Unit 3. Point to Point Protocols -TCP Unit 4. Local Area Networks, LANs 1 Outline Introduction
More informationB.E SEMESTER: 4 INFORMATION TECHNOLOGY
B.E SEMESTER: 4 INFORMATION TECHNOLOGY 1 Prepared by: Prof. Amish Tankariya SUBJECT NAME : DATA COMMUNICATION & NETWORKING 2 Subject Code 141601 1 3 TOPIC: DIGITAL-TO-DIGITAL CONVERSION Chap: 5. ENCODING
More informationQUESTION BANK SUBJECT: DIGITAL COMMUNICATION (15EC61)
QUESTION BANK SUBJECT: DIGITAL COMMUNICATION (15EC61) Module 1 1. Explain Digital communication system with a neat block diagram. 2. What are the differences between digital and analog communication systems?
More informationSEN366 Computer Networks
SEN366 Computer Networks Prof. Dr. Hasan Hüseyin BALIK (5 th Week) 5. Signal Encoding Techniques 5.Outline An overview of the basic methods of encoding digital data into a digital signal An overview of
More informationEEE 309 Communication Theory
EEE 309 Communication Theory Semester: January 2017 Dr. Md. Farhad Hossain Associate Professor Department of EEE, BUET Email: mfarhadhossain@eee.buet.ac.bd Office: ECE 331, ECE Building Types of Modulation
More informationData Encoding. Two devices are used for producing the signals: CODECs produce DIGITAL signals MODEMs produce ANALOGUE signals
Data Encoding Data are propagated from point to point by encoding data into signals The data may be analogue or digital Likewise the signals may be analogue or digital Two devices are used for producing
More informationLecture 10. Digital Modulation
Digital Modulation Lecture 10 On-Off keying (OOK), or amplitude shift keying (ASK) Phase shift keying (PSK), particularly binary PSK (BPSK) Frequency shift keying Typical spectra Modulation/demodulation
More informationEND-OF-YEAR EXAMINATIONS ELEC321 Communication Systems (D2) Tuesday, 22 November 2005, 9:20 a.m. Three hours plus 10 minutes reading time.
END-OF-YEAR EXAMINATIONS 2005 Unit: Day and Time: Time Allowed: ELEC321 Communication Systems (D2) Tuesday, 22 November 2005, 9:20 a.m. Three hours plus 10 minutes reading time. Total Number of Questions:
More informationCOMPUTER COMMUNICATION AND NETWORKS ENCODING TECHNIQUES
COMPUTER COMMUNICATION AND NETWORKS ENCODING TECHNIQUES Encoding Coding is the process of embedding clocks into a given data stream and producing a signal that can be transmitted over a selected medium.
More informationChapter 1 Line Code Encoder
Chapter 1 Line Code Encoder 1-1: Curriculum Objectives 1.To understand the theory and applications of line code encoder. 2.To understand the encode theory and circuit structure of NRZ. 3.To understand
More informationChapter 4 Digital Transmission 4.1
Chapter 4 Digital Transmission 4.1 Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 4-1 DIGITAL-TO-DIGITAL CONVERSION In this section, we see how we can represent
More informationHello and welcome to today s lecture. In the last couple of lectures we have discussed about various transmission media.
Data Communication Prof. Ajit Pal Department of Computer Science & Engineering Indian Institute of Technology, Kharagpur Lecture No # 7 Transmission of Digital Signal-I Hello and welcome to today s lecture.
More informationSixth Semester B.E. Degree Examination, May/June 2010 Digital Communication Note: Answer any FIVEfull questions, selecting at least TWO questionsfrom each part. PART-A a. With a block diagram, explain
More informationExercise Generation and Demodulation of DPSK Signal
Exercise Generation and Demodulation of DPSK Signal EXERCISE OBJECTIVE When you have completed this exercise, you will see the operation principle and characteristics of the DPSK signal generator by measuring
More informationDigital Transmission
Digital Transmission Line Coding Some Characteristics Line Coding Schemes Some Other Schemes Line coding Signal level versus data level DC component Pulse Rate versus Bit Rate Bit Rate = Pulse Rate x Log2
More informationEEE 309 Communication Theory
EEE 309 Communication Theory Semester: January 2016 Dr. Md. Farhad Hossain Associate Professor Department of EEE, BUET Email: mfarhadhossain@eee.buet.ac.bd Office: ECE 331, ECE Building Part 05 Pulse Code
More informationOn-off keying, which consists of keying a sinusoidal carrier on and off with a unipolar binary signal
Bandpass signalling Thus far only baseband signalling has been considered: an information source is usually a baseband signal. Some communication channels have a bandpass characteristic, and will not propagate
More informationDigital Transceiver using H-Ternary Line Coding Technique
Digital Transceiver using H-Ternary Line Coding Technique Abstract In this paper Digital Transceiver using Hybrid Ternary Technique gives the details about digital transmitter and receiver with the design
More informationDigital Transmission (Line Coding) EE4367 Telecom. Switching & Transmission. Pulse Transmission
Digital Transmission (Line Coding) Pulse Transmission Source Multiplexer Line Coder Line Coding: Output of the multiplexer (TDM) is coded into electrical pulses or waveforms for the purpose of transmission
More informationEE 400L Communications. Laboratory Exercise #7 Digital Modulation
EE 400L Communications Laboratory Exercise #7 Digital Modulation Department of Electrical and Computer Engineering University of Nevada, at Las Vegas PREPARATION 1- ASK Amplitude shift keying - ASK - in
More informationCHAPTER 3 Syllabus (2006 scheme syllabus) Differential pulse code modulation DPCM transmitter
CHAPTER 3 Syllabus 1) DPCM 2) DM 3) Base band shaping for data tranmission 4) Discrete PAM signals 5) Power spectra of discrete PAM signal. 6) Applications (2006 scheme syllabus) Differential pulse code
More informationIntroduction: Presence or absence of inherent error detection properties.
Introduction: Binary data can be transmitted using a number of different types of pulses. The choice of a particular pair of pulses to represent the symbols 1 and 0 is called Line Coding and the choice
More informationFundamentals of Digital Communication
Fundamentals of Digital Communication Network Infrastructures A.A. 2017/18 Digital communication system Analog Digital Input Signal Analog/ Digital Low Pass Filter Sampler Quantizer Source Encoder Channel
More informationEXPERIMENT NO. 4 PSK Modulation
DEPARTMENT OF ELECTRICAL & COMPUTER ENGINEERING ECOM 4101 (ECE 4203) COMMUNICATIONS ENGINEERING LAB II SEMESTER 2, 2016/2017 EXPERIMENT NO. 4 PSK Modulation NAME: MATRIC NO: DATE: SECTION: PSK MODULATION
More informationYear : TYEJ Sub: Digital Communication (17535) Assignment No. 1. Introduction of Digital Communication. Question Exam Marks
Assignment 1 Introduction of Digital Communication Sr. Question Exam Marks 1 Draw the block diagram of the basic digital communication system. State the function of each block in detail. W 2015 6 2 State
More informationQUESTION BANK (VI SEM ECE) (DIGITAL COMMUNICATION)
QUESTION BANK (VI SEM ECE) (DIGITAL COMMUNICATION) UNIT-I: PCM & Delta modulation system Q.1 Explain the difference between cross talk & intersymbol interference. Q.2 What is Quantization error? How does
More informationLecture 2 Fiber Optical Communication Lecture 2, Slide 1
Lecture 2 General concepts Digital modulation in general Optical modulation Direct modulation External modulation Modulation formats Differential detection Coherent detection Fiber Optical Communication
More informationBasic Communications Theory Chapter 2
TEMPEST Engineering and Hardware Design Dr. Bruce C. Gabrielson, NCE 1998 Basic Communications Theory Chapter 2 Communicating Information Communications occurs when information is transmitted or sent between
More informationLATHA MATHAVAN ENGINEERING COLLEGE Alagarkovil, Madurai
UNIT I - SAMPLING & QUANTIZATION PART A 1. What is aliasing? (EC6501 June 2016) 2. What is Companding? Sketch the input-output characteristics of a compressor and an expander. (EC6501 June 2016) 3. An
More informationLecture (06) Digital Coding techniques (II) Coverting Digital data to Digital Signals
Lecture (06) Digital Coding techniques (II) Coverting Digital data to Digital Signals Agenda Objective Line Coding Block Coding Scrambling Dr. Ahmed ElShafee ١ Dr. Ahmed ElShafee, ACU Spring 2016, Data
More informationChapter Two. Fundamentals of Data and Signals. Data Communications and Computer Networks: A Business User's Approach Seventh Edition
Chapter Two Fundamentals of Data and Signals Data Communications and Computer Networks: A Business User's Approach Seventh Edition After reading this chapter, you should be able to: Distinguish between
More informationBINARY AMPLITUDE SHIFT KEYING
BINARY AMPLITUDE SHIFT KEYING AIM: To set up a circuit to generate Binary Amplitude Shift keying and to plot the output waveforms. COMPONENTS AND EQUIPMENTS REQUIRED: IC CD4016, IC 7474, Resistors, Zener
More informationBasic Concepts in Data Transmission
Basic Concepts in Data Transmission EE450: Introduction to Computer Networks Professor A. Zahid A.Zahid-EE450 1 Data and Signals Data is an entity that convey information Analog Continuous values within
More information9.4. Synchronization:
9.4. Synchronization: It is the process of timing the serial transmission to properly identify the data being sent. There are two most common modes: Synchronous transmission: Synchronous transmission relies
More informationEE 460L University of Nevada, Las Vegas ECE Department
EE 460L PREPARATION 1- ASK Amplitude shift keying - ASK - in the context of digital communications is a modulation process which imparts to a sinusoid two or more discrete amplitude levels. These are related
More informationCommunication System KL-910. Advanced Communication System
KL-910 Advanced KL-910 is a modular trainer with various advanced communication s, including digital encoding/decoding, modulation/demodulation and related multiplexing techniques, developed for bridging
More informationCommunications I (ELCN 306)
Communications I (ELCN 306) c Samy S. Soliman Electronics and Electrical Communications Engineering Department Cairo University, Egypt Email: samy.soliman@cu.edu.eg Website: http://scholar.cu.edu.eg/samysoliman
More informationSUMMER 15 EXAMINATION. 1) The answers should be examined by key words and not as word-to-word as given in the
SUMMER 15 EXAMINATION Subject Code: 17535 Model Answer Important Instructions to examiners: 1) The answers should be examined by key words and not as word-to-word as given in the model answer scheme. 2)
More informationContents. 7.1 Line Coding. Dr. Ali Muqaibel [Principles of Digital Transmission ]
Contents 7.1 Line Coding... 1 Performance Criteria of Line Codes... 4 Advanced Examples in Line Coding: High Density Bipolar (HDBN)... 5 7. Power Spectral Density of Line Codes... 5 7.3 Pulse shaping and
More informationDigital communication
Chapter 4 Digital communication A digital is a discrete-time binary m : Integers Bin = {0, 1}. To transmit such a it must first be transformed into a analog. The is then transmitted as such or modulated
More informationSUMMER 14 EXAMINATION Model Answer
SUMMER 14 EXAMINATION Model Answer Subject Code: 12188 Important Instructions to examiners: 1) The answers should be examined by key words and not as word-to-word as given in the model answer scheme. 2)
More informationUniversitas Sumatera Utara
Amplitude Shift Keying & Frequency Shift Keying Aim: To generate and demodulate an amplitude shift keyed (ASK) signal and a binary FSK signal. Intro to Generation of ASK Amplitude shift keying - ASK -
More informationȘ.l. dr. ing. Lucian-Florentin Bărbulescu
Ș.l. dr. ing. Lucian-Florentin Bărbulescu 1 Data: entities that convey meaning within a computer system Signals: are the electric or electromagnetic impulses used to encode and transmit data Characteristics
More informationSerial Data Transmission
Serial Data Transmission Dr. José Ernesto Rayas Sánchez 1 Outline Baseband serial transmission Line Codes Bandwidth of serial data streams Block codes Serialization Intersymbol Interference (ISI) Jitter
More informationEEE482F: Problem Set 1
EEE482F: Problem Set 1 1. A digital source emits 1.0 and 0.0V levels with a probability of 0.2 each, and +3.0 and +4.0V levels with a probability of 0.3 each. Evaluate the average information of the source.
More informationLine Coding for Digital Communication
Line Coding for Digital Communication How do we transmit bits over a wire, RF, fiber? Line codes, many options Power spectrum of line codes, how much bandwidth do they take Clock signal and synchronization
More informationDigital Transmission (Line Coding)
Digital Transmission (Line Coding) Pulse Transmission Source Multiplexer Line Coder Line Coding: Output of the multiplexer (TDM) is coded into electrical pulses or waveforms for the purpose of transmission
More informationData Communications and Networking (Module 2)
Data Communications and Networking (Module 2) Chapter 5 Signal Encoding Techniques References: Book Chapter 5 Data and Computer Communications, 8th edition, by William Stallings 1 Outline Overview Encoding
More informationDigital data (a sequence of binary bits) can be transmitted by various pule waveforms.
Chapter 2 Line Coding Digital data (a sequence of binary bits) can be transmitted by various pule waveforms. Sometimes these pulse waveforms have been called line codes. 2.1 Signalling Format Figure 2.1
More informationDigital to Digital Encoding
MODULATION AND ENCODING Data must be transformed into signals to send them from one place to another Conversion Schemes Digital-to-Digital Analog-to-Digital Digital-to-Analog Analog-to-Analog Digital to
More informationPrinciples of Baseband Digital Data Transmission
Principles of Baseband Digital Data Transmission Prof. Wangrok Oh Dept. of Information Communications Eng. Chungnam National University Prof. Wangrok Oh(CNU) / 3 Overview Baseband Digital Data Transmission
More informationLecture 3 Concepts for the Data Communications and Computer Interconnection
Lecture 3 Concepts for the Data Communications and Computer Interconnection Aim: overview of existing methods and techniques Terms used: -Data entities conveying meaning (of information) -Signals data
More informationDepartment of Electronics and Communication Engineering 1
UNIT I SAMPLING AND QUANTIZATION Pulse Modulation 1. Explain in detail the generation of PWM and PPM signals (16) (M/J 2011) 2. Explain in detail the concept of PWM and PAM (16) (N/D 2012) 3. What is the
More informationText Book: Simon Haykin & Michael Moher,
Qassim University College of Engineering Electrical Engineering Department Electronics and Communications Course: EE322 Digital Communications Prerequisite: EE320 Text Book: Simon Haykin & Michael Moher,
More informationDepartment of Electronics & Telecommunication Engg. LAB MANUAL. B.Tech V Semester [ ] (Branch: ETE)
Department of Electronics & Telecommunication Engg. LAB MANUAL SUBJECT:-DIGITAL COMMUNICATION SYSTEM [BTEC-501] B.Tech V Semester [2013-14] (Branch: ETE) KCT COLLEGE OF ENGG & TECH., FATEHGARH PUNJAB TECHNICAL
More information6. has units of bits/second. a. Throughput b. Propagation speed c. Propagation time d. (b)or(c)
King Saud University College of Computer and Information Sciences Information Technology Department First Semester 1436/1437 IT224: Networks 1 Sheet# 10 (chapter 3-4-5) Multiple-Choice Questions 1. Before
More informationUniversity of Swaziland Faculty of Science Department of Electrical and Electronic Engineering Main Examination 2015
University of Swaziland Faculty of Science Department of Electrical and Electronic Engineering Main Examination 2015 Title of Paper Course Number Time Allowed Instructions Digital Communication Systems
More informationDigital signal is denoted by discreet signal, which represents digital data.there are three types of line coding schemes available:
Digital-to-Digital Conversion This section explains how to convert digital data into digital signals. It can be done in two ways, line coding and block coding. For all communications, line coding is necessary
More informationClass 4 ((Communication and Computer Networks))
Class 4 ((Communication and Computer Networks)) Lesson 5... SIGNAL ENCODING TECHNIQUES Abstract Both analog and digital information can be encoded as either analog or digital signals. The particular encoding
More informationDEPARTMENT OF COMPUTER GCE@Bodi_ SCIENCE GCE@Bodi_ AND ENIGNEERING GCE@Bodi_ GCE@Bodi_ GCE@Bodi_ Analog and Digital Communication GCE@Bodi_ DEPARTMENT OF CsE Subject Name: Analog and Digital Communication
More informationDownloaded from 1
VII SEMESTER FINAL EXAMINATION-2004 Attempt ALL questions. Q. [1] How does Digital communication System differ from Analog systems? Draw functional block diagram of DCS and explain the significance of
More informationCTD600 Communication Trainer kit
kit Digital RELATED PRODUCTS v Analog s v Optical Fibers s v Digital and Analog s v Communication Electronic Trainers v Function Generator and Power Supply v Multiple Signal Generator and 1 Line Code 2
More informationFundamentals of Data and Signals
Fundamentals of Data and Signals Chapter 2 Learning Objectives After reading this chapter, you should be able to: Distinguish between data and signals and cite the advantages of digital data and signals
More informationBSc (Hons) Computer Science with Network Security. Examinations for Semester 1
BSc (Hons) Computer Science with Network Security Cohort: BCNS/15B/FT Examinations for 2015-2016 Semester 1 MODULE: DATA COMMUNICATIONS MODULE CODE: CAN1101C Duration: 2 Hours Instructions to Candidates:
More informationEITF25 Internet Techniques and Applications L2: Physical layer. Stefan Höst
EITF25 Internet Techniques and Applications L2: Physical layer Stefan Höst Data vs signal Data: Static representation of information For storage Signal: Dynamic representation of information For transmission
More information7.1 Introduction 7.2 Why Digitize Analog Sources? 7.3 The Sampling Process 7.4 Pulse-Amplitude Modulation Time-Division i i Modulation 7.
Chapter 7 Digital Representation of Analog Signals Wireless Information Transmission System Lab. Institute of Communications Engineering g National Sun Yat-sen University Contents 7.1 Introduction 7.2
More informationTime division multiplexing The block diagram for TDM is illustrated as shown in the figure
CHAPTER 2 Syllabus: 1) Pulse amplitude modulation 2) TDM 3) Wave form coding techniques 4) PCM 5) Quantization noise and SNR 6) Robust quantization Pulse amplitude modulation In pulse amplitude modulation,
More informationINTRODUCTION TO COMMUNICATION SYSTEMS LABORATORY IV. Binary Pulse Amplitude Modulation and Pulse Code Modulation
INTRODUCTION TO COMMUNICATION SYSTEMS Introduction: LABORATORY IV Binary Pulse Amplitude Modulation and Pulse Code Modulation In this lab we will explore some of the elementary characteristics of binary
More informationUNIT I Source Coding Systems
SIDDHARTH GROUP OF INSTITUTIONS: PUTTUR Siddharth Nagar, Narayanavanam Road 517583 QUESTION BANK (DESCRIPTIVE) Subject with Code: DC (16EC421) Year & Sem: III-B. Tech & II-Sem Course & Branch: B. Tech
More informationUniversity of Swaziland Faculty of Science Department of Electrical and Electronic Engineering Main Examination 2016
University of Swaziland Faculty of Science Department of Electrical and Electronic Engineering Main Examination 2016 Title of Paper Course Number Time Allowed Instructions Digital Communication Systems
More informationAmplitude Frequency Phase
Chapter 4 (part 2) Digital Modulation Techniques Chapter 4 (part 2) Overview Digital Modulation techniques (part 2) Bandpass data transmission Amplitude Shift Keying (ASK) Phase Shift Keying (PSK) Frequency
More informationLecture-8 Transmission of Signals
Lecture-8 Transmission of Signals The signals are transmitted as electromagnetic waveforms. As the signal may be analog or digital, there four case of signal transmission. Analog data Analog Signal:- The
More informationQUESTION BANK EC 1351 DIGITAL COMMUNICATION YEAR / SEM : III / VI UNIT I- PULSE MODULATION PART-A (2 Marks) 1. What is the purpose of sample and hold
QUESTION BANK EC 1351 DIGITAL COMMUNICATION YEAR / SEM : III / VI UNIT I- PULSE MODULATION PART-A (2 Marks) 1. What is the purpose of sample and hold circuit 2. What is the difference between natural sampling
More informationAppendix A. Satellite Signal Processing Elements
Appendix A Satellite Signal Processing Elements This appendix provides an overview of the basic signal processing elements that are present in virtually all traditional communications systems, including
More informationChapter 6 Bandwidth Utilization: Multiplexing and Spreading 6.1
Chapter 6 Bandwidth Utilization: Multiplexing and Spreading 6.1 Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 3-6 PERFORMANCE One important issue in networking
More informationDigital Transmission
Digital Transmission 4.1 DIGITAL-TO-DIGITAL CONVERSION In this section, we see how we can represent digital data by using digital signals. The conversion involves three techniques: line coding, block coding,
More informationCHAPTER 2 DIGITAL MODULATION
2.1 INTRODUCTION CHAPTER 2 DIGITAL MODULATION Referring to Equation (2.1), if the information signal is digital and the amplitude (lv of the carrier is varied proportional to the information signal, a
More informationOutline Chapter 3: Principles of Digital Communications
Outline Chapter 3: Principles of Digital Communications Structure of a Data Transmission System Up- and Down-Conversion Lowpass-to-Bandpass Conversion Baseband Presentation of Communication System Basic
More informationDEPARTMENT OF ELECTRICAL & COMPUTER ENGINEERING ECOM 4101 (ECE 4203) COMMUNICATIONS ENGINEERING LAB II SEMESTER 2, 2016/2017 EXPERIMENT NO.
DEPARTMENT OF ELECTRICAL & COMPUTER ENGINEERING ECOM 4101 (ECE 4203) COMMUNICATIONS ENGINEERING LAB II SEMESTER 2, 2016/2017 EXPERIMENT NO. 2 ASK MODULATION NAME: MATRIC NO: DATE: SECTION: Objectives To
More informationDigital Communication
Digital Communication Laboratories bako@ieee.org DigiCom Labs There are 5 labs related to the digital communication. Study of the parameters of metal cables including: characteristic impendance, attenuation
More informationChapter 4. Part 2(a) Digital Modulation Techniques
Chapter 4 Part 2(a) Digital Modulation Techniques Overview Digital Modulation techniques Bandpass data transmission Amplitude Shift Keying (ASK) Phase Shift Keying (PSK) Frequency Shift Keying (FSK) Quadrature
More information3.6 Intersymbol interference. 1 Your site here
3.6 Intersymbol intererence 1 3.6 Intersymbol intererence what is intersymbol intererence and what cause ISI 1. The absolute bandwidth o rectangular multilevel pulses is ininite. The channels bandwidth
More informationEC6501 Digital Communication
EC6501 Digital Communication UNIT -1 DIGITAL COMMUNICATION SYSTEMS Digital Communication system 1) Write the advantages and disadvantages of digital communication. [A/M 11] The advantages of digital communication
More information28. What is meant by repetition rate of the AM envelope? (ADC,AU-2010) 29. Describe the upper and lower sidebands. (ADC, AU-2010) 30.
Institute of Road and Transport Technology, Erode Department of Electronics and Communication Engineering Class/Sem: 2 nd Year Information Technology-3rd Semester Subject: Principles of Communication (IT)
More informationDatacommunication I. Layers of the OSI-model. Lecture 3. signal encoding, error detection/correction
Datacommunication I Lecture 3 signal encoding, error detection/correction Layers of the OSI-model repetition 1 The OSI-model and its networking devices repetition The OSI-model and its networking devices
More informationUNIT III -- DATA AND PULSE COMMUNICATION PART-A 1. State the sampling theorem for band-limited signals of finite energy. If a finite energy signal g(t) contains no frequency higher than W Hz, it is completely
More informationProblems from the 3 rd edition
(2.1-1) Find the energies of the signals: a) sin t, 0 t π b) sin t, 0 t π c) 2 sin t, 0 t π d) sin (t-2π), 2π t 4π Problems from the 3 rd edition Comment on the effect on energy of sign change, time shifting
More informationB. Tech. (SEM. VI) EXAMINATION, (2) All question early equal make. (3) In ease of numerical problems assume data wherever not provided.
" 11111111111111111111111111111111111111111111111111111111111111III *U-3091/8400* Printed Pages : 7 TEC - 601! I i B. Tech. (SEM. VI) EXAMINATION, 2007-08 DIGIT AL COMMUNICATION \ V Time: 3 Hours] [Total
More informationChapter 2: Fundamentals of Data and Signals
Chapter 2: Fundamentals of Data and Signals TRUE/FALSE 1. The terms data and signal mean the same thing. F PTS: 1 REF: 30 2. By convention, the minimum and maximum values of analog data and signals are
More informationCHAPTER 4. PULSE MODULATION Part 2
CHAPTER 4 PULSE MODULATION Part 2 Pulse Modulation Analog pulse modulation: Sampling, i.e., information is transmitted only at discrete time instants. e.g. PAM, PPM and PDM Digital pulse modulation: Sampling
More informationSignals A Preliminary Discussion EE442 Analog & Digital Communication Systems Lecture 2
Signals A Preliminary Discussion EE442 Analog & Digital Communication Systems Lecture 2 The Fourier transform of single pulse is the sinc function. EE 442 Signal Preliminaries 1 Communication Systems and
More informationEXPERIMENT NO. 3 FSK Modulation
DEPARTMENT OF ELECTRICAL & COMPUTER ENGINEERING ECE 4203: COMMUNICATIONS ENGINEERING LAB II SEMESTER 2, 2017/2018 EXPERIMENT NO. 3 FSK Modulation NAME: MATRIC NO: DATE: SECTION: FSK MODULATION Objective
More information