Physical Layer, Part 2. Analog and Digital Transmission

Size: px
Start display at page:

Download "Physical Layer, Part 2. Analog and Digital Transmission"

Transcription

1 CS 656 Analog/Digital, Page 1 Physical Layer, Part 2 Analog and Digital Transmission These slides are created by Dr. Yih Huang of George Mason University. Students registered in Dr. Huang s courses at GMU can make a single machine-readable copy and print a single copy of each slide for their own reference, so long as each slide contains the copyright statement, and GMU facilities are not used to produce paper copies. Permission for any other use, either in machine-readable or printed form, must be obtained from the author in writing. CS 656 Analog/Digital, Page 2 Analog vs Digital Analog data continuous values ex. voice, video, temperature Digital data discrete values ex. ASCII data, numeric data Analog signal/transmission continuously varying signal canbeusedtotransmitanalogdata example?

2 CS 656 Analog/Digital, Page 3 canbeusedtotransmitdigitaldata example? use amplifiers to boost energy in signal due to attenuation amplification distorts analog signal because noise is also amplified. Digital signal/transmission (ideally) sequence of discrete values canbeusedtotransmitanalogdata example? canbeusedtotransmitdigitaldata example? repeaters used to restore signal periodically repeaters do not distort the signal (and data) CS 656 Analog/Digital, Page 4 Digital Transmission Digital transmission is the future. Due to VLSI technology, price of digital circuitry is continually dropping; not as drastic for analog equipment Multiplexing is easier, compared to analog transmission. multiplexing enables multiple low-bandwidth signals to share a single high-bandwidth transmission medium Encryption techniques can easily be applied (to both digital and analog data). Enable integration of multiple communication forms, such as human interaction and computer communications, in one network.

3 CS 656 Analog/Digital, Page 5 Digital Data, Digital Signals Data rate: number of bits/bytes transmitted per second Modulation rate (bouads): rate at which the signal is changed Encoding: mapping from data bits to signal elements CS 656 Analog/Digital, Page 6 Nonreturn to Zero (NRZ) Encoding a positive voltage represents 1; a negative voltage represents 0 simplest to implement efficient use of bandwidth (modulation rate equals data rate) no synchronization available from the signal

4 CS 656 Analog/Digital, Page 7 Manchester Encoding a downward transition represents 1; a upward transition represents 0 at least one transition per bit self-clocking/synchronization; error detection modulation rate twice the bit rate inefficient use of bandwidth used in some LANs CS 656 Analog/Digital, Page 8 Delay Modulation Encoding a transition in middle represents 1; no transition represents 0 must have at least one transition per two bits to enforce this, insert a transition at the beginning of a bit period when necessary

5 CS 656 Analog/Digital, Page 9 Bipolar Encoding 0 Volt represents 0; either positive or negative pulse represents 1 The 1 pulses must alternate in polarity. used in T1 lines CS 656 Analog/Digital, Page 10 Digital Data, Analog Signals Most common usage is in transmitting digital data using modem. Requires use of modem to convert digital data to analog signals, and vise versa. Uses modulation techniques to impress digital data on analog signals (e.g., voices). Amplitude-shift keying Frequency-shift keying Phase-shift keying combinations of above

6 CS 656 Analog/Digital, Page 11 Amplitude-Shift Keying vary amplitude of the signal (called carrier) commonly, one of the amplitudes is zero CS 656 Analog/Digital, Page 12 Frequency-Shift Keying vary frequency of the signal (called carrier) used in high-frequency radio transmission, among others

7 CS 656 Analog/Digital, Page 13 Phase-Shift Keying vary phase of the signal a simple PSK scheme works like this: 0 has the same phase of the previous bit; 1 has the opposite phase (180 0 ) CS 656 Analog/Digital, Page =0 270

8 CS 656 Analog/Digital, Page 15 more sophisticated schemes use phase shifts other than 180 degree for example: binary 00, 0 degree shift; 01, 90; 10, 180; 11, CS 656 Analog/Digital, Page 16 Quadrature Amplitude Modulation A method of combining of amplitude-shift and phase-shift keying Example: to encode 3 bits per signaling element Bit Combination Phase Shift Amplitude low high low high low high low high

9 CS 656 Analog/Digital, Page 17 Analog Data, Digital Signals The transmission of digitized analog data (such as voice). Examples Internet telephony Surprise, telephone networks too! Internally, modern telephone networks use digital transmission A technique called Pulse Code Modulation (PCM) is used to digitize voice signals. each voice signal is supposed to have 4 khz bandwidth the signal is sampled 8000 times per second, 8-bit result per sample CS 656 Analog/Digital, Page 18 Analog Data, Analog Signal Examples: voice signals over the telephone wire in your house TV broadcast, AM/FM radio, etc. Modulation can be used so that multiple signals can share a single high-bandwidth medium (that is, multiplexing). amplitude modulation frequency modulation

Class 4 ((Communication and Computer Networks))

Class 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 information

Basic Concepts in Data Transmission

Basic 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 information

Chapter 2: Fundamentals of Data and Signals

Chapter 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 information

COMPUTER COMMUNICATION AND NETWORKS ENCODING TECHNIQUES

COMPUTER 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 information

2. By convention, the minimum and maximum values of analog data and signals are presented as voltages.

2. By convention, the minimum and maximum values of analog data and signals are presented as voltages. Chapter 2: Fundamentals of Data and Signals Data Communications and Computer Networks A Business Users Approach 8th Edition White TEST BANK Full clear download (no formatting errors) at: https://testbankreal.com/download/data-communications-computer-networksbusiness-users-approach-8th-edition-white-test-bank/

More information

Chapter 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 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 information

SEN366 Computer Networks

SEN366 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 information

Lecture 3 Concepts for the Data Communications and Computer Interconnection

Lecture 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 information

CSCD 433 Network Programming Fall Lecture 5 Physical Layer Continued

CSCD 433 Network Programming Fall Lecture 5 Physical Layer Continued CSCD 433 Network Programming Fall 2016 Lecture 5 Physical Layer Continued 1 Topics Definitions Analog Transmission of Digital Data Digital Transmission of Analog Data Multiplexing 2 Different Types of

More information

Data Communications and Networking (Module 2)

Data 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 information

Signal Encoding Techniques

Signal Encoding Techniques 2 Techniques ITS323: to Data Communications CSS331: Fundamentals of Data Communications Sirindhorn International Institute of Technology Thammasat University Prepared by Steven Gordon on 3 August 2015

More information

CSCD 433 Network Programming Fall Lecture 5 Physical Layer Continued

CSCD 433 Network Programming Fall Lecture 5 Physical Layer Continued CSCD 433 Network Programming Fall 2016 Lecture 5 Physical Layer Continued 1 Topics Definitions Analog Transmission of Digital Data Digital Transmission of Analog Data Multiplexing 2 Different Types of

More information

Wireless Communications

Wireless Communications 2. Physical Layer DIN/CTC/UEM 2018 Periodic Signal Periodic signal: repeats itself in time, that is g(t) = g(t + T ) in which T (given in seconds [s]) is the period of the signal g(t) The number of cycles

More information

Digital signal is denoted by discreet signal, which represents digital data.there are three types of line coding schemes available:

Digital 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 information

COSC 3213: Computer Networks I: Chapter 3 Handout #4. Instructor: Dr. Marvin Mandelbaum Department of Computer Science York University Section A

COSC 3213: Computer Networks I: Chapter 3 Handout #4. Instructor: Dr. Marvin Mandelbaum Department of Computer Science York University Section A COSC 3213: Computer Networks I: Chapter 3 Handout #4 Instructor: Dr. Marvin Mandelbaum Department of Computer Science York University Section A Topics: 1. Line Coding: Unipolar, Polar,and Inverted ; Bipolar;

More information

Lecture-8 Transmission of Signals

Lecture-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 information

Data Encoding g(p (part 2)

Data Encoding g(p (part 2) Data Encoding g(p (part 2) CSE 3213 Instructor: U.T. Nguyen 10/11/2007 12:44 PM 1 Analog Data, Digital Signals (5.3) 2 1 Analog Data, Digital Signals Digitization Conversion of analog data into digital

More information

The quality of the transmission signal The characteristics of the transmission medium. Some type of transmission medium is required for transmission:

The quality of the transmission signal The characteristics of the transmission medium. Some type of transmission medium is required for transmission: Data Transmission The successful transmission of data depends upon two factors: The quality of the transmission signal The characteristics of the transmission medium Some type of transmission medium is

More information

Department of Electronics & Telecommunication Engg. LAB MANUAL. B.Tech V Semester [ ] (Branch: ETE)

Department 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 information

Data Transmission Definition Data Transmission Analog Transmission Digital Transmission

Data Transmission Definition Data Transmission Analog Transmission Digital Transmission Data Transmission Definition Data Transmission Data transmission occurs between transmitter (sender) and receiver over some transmission medium. This transfer of data takes place via some form of transmission

More information

Fundamentals of Data and Signals

Fundamentals 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 information

6. has units of bits/second. a. Throughput b. Propagation speed c. Propagation time d. (b)or(c)

6. 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 information

Digital to Digital Encoding

Digital 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 information

Hello and welcome to today s lecture. In the last couple of lectures we have discussed about various transmission media.

Hello 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 information

Lecture Outline. Data and Signals. Analogue Data on Analogue Signals. OSI Protocol Model

Lecture Outline. Data and Signals. Analogue Data on Analogue Signals. OSI Protocol Model Lecture Outline Data and Signals COMP312 Richard Nelson richardn@cs.waikato.ac.nz http://www.cs.waikato.ac.nz Analogue Data on Analogue Signals Digital Data on Analogue Signals Analogue Data on Digital

More information

Data Encoding. Two devices are used for producing the signals: CODECs produce DIGITAL signals MODEMs produce ANALOGUE signals

Data 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 information

Ș.l. dr. ing. Lucian-Florentin Bărbulescu

Ș.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 information

C06a: Digital Modulation

C06a: Digital Modulation CISC 7332X T6 C06a: Digital Modulation Hui Chen Department of Computer & Information Science CUNY Brooklyn College 10/2/2018 CUNY Brooklyn College 1 Outline Digital modulation Baseband transmission Line

More information

ECE 4203: COMMUNICATIONS ENGINEERING LAB II

ECE 4203: COMMUNICATIONS ENGINEERING LAB II DEPARTMENT OF ELECTRICAL & COMPUTER ENGINEERING ECE 4203: COMMUNICATIONS ENGINEERING LAB II SEMESTER 2, 2017/2018 DIGITAL MODULATIONS INTRODUCTION In many digital communication systems, cable (as for data

More information

Overview. Chapter 4. Design Factors. Electromagnetic Spectrum

Overview. Chapter 4. Design Factors. Electromagnetic Spectrum Chapter 4 Transmission Media Overview Guided - wire Unguided - wireless Characteristics and quality determined by medium and signal For guided, the medium is more important For unguided, the bandwidth

More information

Data Communication (CS601)

Data Communication (CS601) Data Communication (CS601) MOST LATEST (2012) PAPERS For MID Term (ZUBAIR AKBAR KHAN) Page 1 Q. Suppose a famous Telecomm company AT&T is using AMI encoding standard for its digital telephone services,

More information

Data Communication. Chapter 3 Data Transmission

Data Communication. Chapter 3 Data Transmission Data Communication Chapter 3 Data Transmission ١ Terminology (1) Transmitter Receiver Medium Guided medium e.g. twisted pair, coaxial cable, optical fiber Unguided medium e.g. air, water, vacuum ٢ Terminology

More information

Overview. Lecture 3. Terminology. Terminology. Background. Background. Transmission basics. Transmission basics. Two signal types

Overview. Lecture 3. Terminology. Terminology. Background. Background. Transmission basics. Transmission basics. Two signal types Lecture 3 Transmission basics Chapter 3, pages 75-96 Dave Novak School of Business University of Vermont Overview Transmission basics Terminology Signal Channel Electromagnetic spectrum Two signal types

More information

Signal Characteristics

Signal Characteristics Data Transmission The successful transmission of data depends upon two factors:» The quality of the transmission signal» The characteristics of the transmission medium Some type of transmission medium

More information

Signal Encoding Techniques

Signal Encoding Techniques Signal Encoding Techniques Overview Have already noted previous chapters that both analog and digital information can be encoded as either analog or digital signals: Digital data, digital signals: simplest

More information

Chapter 5: Modulation Techniques. Abdullah Al-Meshal

Chapter 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 information

CS601 Data Communication Solved Objective For Midterm Exam Preparation

CS601 Data Communication Solved Objective For Midterm Exam Preparation CS601 Data Communication Solved Objective For Midterm Exam Preparation Question No: 1 Effective network mean that the network has fast delivery, timeliness and high bandwidth duplex transmission accurate

More information

Computer Facilities and Network Management BUS3150 Assignment 1

Computer Facilities and Network Management BUS3150 Assignment 1 Computer Facilities and Network Management BUS3150 Assignment 1 Due date: Friday 1st September 2006 (Week 7) This Assignment has 6 questions, and you should complete answers for all 6. The Assignment contributes

More information

Chapter 4 Digital Transmission 4.1

Chapter 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 information

Sirindhorn International Institute of Technology Thammasat University

Sirindhorn International Institute of Technology Thammasat University Name...ID... Section...Seat No... Sirindhorn International Institute of Technology Thammasat University Midterm Examination: Semester 1/2009 Course Title Instructor : ITS323 Introduction to Data Communications

More information

Datacommunication I. Layers of the OSI-model. Lecture 3. signal encoding, error detection/correction

Datacommunication 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 information

9.4. Synchronization:

9.4. 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 information

Chapter 3 Data and Signals

Chapter 3 Data and Signals Chapter 3 Data and Signals 3.2 To be transmitted, data must be transformed to electromagnetic signals. 3-1 ANALOG AND DIGITAL Data can be analog or digital. The term analog data refers to information that

More information

EECS 122: Introduction to Computer Networks Encoding and Framing. Questions

EECS 122: Introduction to Computer Networks Encoding and Framing. Questions EECS 122: Introduction to Computer Networks Encoding and Framing Computer Science Division Department of Electrical Engineering and Computer Sciences University of California, Berkeley Berkeley, CA 94720-1776

More information

Chapter 2. Physical Layer

Chapter 2. Physical Layer Chapter 2 Physical Layer Lecture 1 Outline 2.1 Analog and Digital 2.2 Transmission Media 2.3 Digital Modulation and Multiplexing 2.4 Transmission Impairment 2.5 Data-rate Limits 2.6 Performance Physical

More information

CS441 Mobile & Wireless Computing Communication Basics

CS441 Mobile & Wireless Computing Communication Basics Department of Computer Science Southern Illinois University Carbondale CS441 Mobile & Wireless Computing Communication Basics Dr. Kemal Akkaya E-mail: kemal@cs.siu.edu Kemal Akkaya Mobile & Wireless Computing

More information

CHAPTER 2. Instructor: Mr. Abhijit Parmar Course: Mobile Computing and Wireless Communication ( )

CHAPTER 2. Instructor: Mr. Abhijit Parmar Course: Mobile Computing and Wireless Communication ( ) CHAPTER 2 Instructor: Mr. Abhijit Parmar Course: Mobile Computing and Wireless Communication (2170710) Syllabus Chapter-2.3 Modulation Techniques Reasons for Choosing Encoding Techniques Digital data,

More information

CTD600 Communication Trainer kit

CTD600 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 information

Encoding and Framing

Encoding and Framing Encoding and Framing EECS 489 Computer Networks http://www.eecs.umich.edu/~zmao/eecs489 Z. Morley Mao Tuesday Nov 2, 2004 Acknowledgement: Some slides taken from Kurose&Ross and Katz&Stoica 1 Questions

More information

EIE 441 Advanced Digital communications

EIE 441 Advanced Digital communications EIE 441 Advanced Digital communications MACHED FILER 1. Consider the signal s ( ) shown in Fig. 1. 1 t (a) Determine the impulse response of a filter matched to this signal and sketch it as a function

More information

EEE 309 Communication Theory

EEE 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 information

CS601-Data Communication Latest Solved Mcqs from Midterm Papers

CS601-Data Communication Latest Solved Mcqs from Midterm Papers CS601-Data Communication Latest Solved Mcqs from Midterm Papers May 07,2011 Lectures 1-22 Moaaz Siddiq Latest Mcqs MIDTERM EXAMINATION Spring 2010 Question No: 1 ( Marks: 1 ) - Please choose one Effective

More information

Encoding and Framing. Questions. Signals: Analog vs. Digital. Signals: Periodic vs. Aperiodic. Attenuation. Data vs. Signal

Encoding and Framing. Questions. Signals: Analog vs. Digital. Signals: Periodic vs. Aperiodic. Attenuation. Data vs. Signal Questions Encoding and Framing Why are some links faster than others? What limits the amount of information we can send on a link? How can we increase the capacity of a link? EECS 489 Computer Networks

More information

Physical Layer. Networks: Physical Layer 1

Physical Layer. Networks: Physical Layer 1 Physical Layer Networks: Physical Layer 1 Physical Layer Part 1 Definitions Nyquist Theorem - noiseless Shannon s Result with noise Analog versus Digital Amplifier versus Repeater Networks: Physical Layer

More information

BSc (Hons) Computer Science with Network Security. Examinations for Semester 1

BSc (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 information

Lecture 5 Transmission

Lecture 5 Transmission Lecture 5 Transmission David Andersen Department of Computer Science Carnegie Mellon University 15-441 Networking, Spring 2005 http://www.cs.cmu.edu/~srini/15-441/s05 1 Physical and Datalink Layers: 3

More information

Digital Modulation Lecture 01. Review of Analogue Modulation Introduction to Digital Modulation Techniques Richard Harris

Digital Modulation Lecture 01. Review of Analogue Modulation Introduction to Digital Modulation Techniques Richard Harris Digital Modulation Lecture 01 Review of Analogue Modulation Introduction to Digital Modulation Techniques Richard Harris Objectives You will be able to: Classify the various approaches to Analogue Modulation

More information

Objectives. Presentation Outline. Digital Modulation Lecture 01

Objectives. Presentation Outline. Digital Modulation Lecture 01 Digital Modulation Lecture 01 Review of Analogue Modulation Introduction to Digital Modulation Techniques Richard Harris Objectives You will be able to: Classify the various approaches to Analogue Modulation

More information

EXPERIMENT WISE VIVA QUESTIONS

EXPERIMENT WISE VIVA QUESTIONS EXPERIMENT WISE VIVA QUESTIONS Pulse Code Modulation: 1. Draw the block diagram of basic digital communication system. How it is different from analog communication system. 2. What are the advantages of

More information

(Refer Slide Time: 2:23)

(Refer Slide Time: 2:23) Data Communications Prof. A. Pal Department of Computer Science & Engineering Indian Institute of Technology, Kharagpur Lecture-11B Multiplexing (Contd.) Hello and welcome to today s lecture on multiplexing

More information

Digital Communication (650533) CH 3 Pulse Modulation

Digital 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 information

CHAPTER 3 Syllabus (2006 scheme syllabus) Differential pulse code modulation DPCM transmitter

CHAPTER 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 information

Chapter 3. Data Transmission

Chapter 3. Data Transmission Chapter 3 Data Transmission Reading Materials Data and Computer Communications, William Stallings Terminology (1) Transmitter Receiver Medium Guided medium (e.g. twisted pair, optical fiber) Unguided medium

More information

EITF25 Internet Techniques and Applications L2: Physical layer. Stefan Höst

EITF25 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 information

Chapter 3 Data and Signals 3.1

Chapter 3 Data and Signals 3.1 Chapter 3 Data and Signals 3.1 Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Note To be transmitted, data must be transformed to electromagnetic signals. 3.2

More information

TELECOMMUNICATION SYSTEMS

TELECOMMUNICATION SYSTEMS TELECOMMUNICATION SYSTEMS By Syed Bakhtawar Shah Abid Lecturer in Computer Science 1 MULTIPLEXING An efficient system maximizes the utilization of all resources. Bandwidth is one of the most precious resources

More information

1/14. Signal. Surasak Sanguanpong Last updated: 11 July Signal 1/14

1/14. Signal. Surasak Sanguanpong  Last updated: 11 July Signal 1/14 1/14 Signal Surasak Sanguanpong nguan@ku.ac.th http://www.cpe.ku.ac.th/~nguan Last updated: 11 July 2000 Signal 1/14 Transmission structure 2/14 Transmitter/ Receiver Medium Amplifier/ Repeater Medium

More information

Modulation is the process of impressing a low-frequency information signal (baseband signal) onto a higher frequency carrier signal

Modulation is the process of impressing a low-frequency information signal (baseband signal) onto a higher frequency carrier signal Modulation is the process of impressing a low-frequency information signal (baseband signal) onto a higher frequency carrier signal Modulation is a process of mixing a signal with a sinusoid to produce

More information

ITL Basics of Encoding and Wiring

ITL Basics of Encoding and Wiring ITL Basics of Encoding and Wiring Objectives Quick overview of wide-area communications Define the term Structured Wiring Define "analog" and "digital" data. List the common methods used to encode analog/digital

More information

MODULATION AND MULTIPLE ACCESS TECHNIQUES

MODULATION AND MULTIPLE ACCESS TECHNIQUES 1 MODULATION AND MULTIPLE ACCESS TECHNIQUES Networks and Communication Department Dr. Marwah Ahmed Outlines 2 Introduction Digital Transmission Digital Modulation Digital Transmission of Analog Signal

More information

Channel Concepts CS 571 Fall Kenneth L. Calvert

Channel Concepts CS 571 Fall Kenneth L. Calvert Channel Concepts CS 571 Fall 2006 2006 Kenneth L. Calvert What is a Channel? Channel: a means of transmitting information A means of communication or expression Webster s NCD Aside: What is information...?

More information

UNIT TEST I Digital Communication

UNIT 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 information

Digital data (a sequence of binary bits) can be transmitted by various pule waveforms.

Digital 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 information

Chapter 1 Line Code Encoder

Chapter 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 information

Digital Transmission

Digital 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 information

Time division multiplexing The block diagram for TDM is illustrated as shown in the figure

Time 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 information

In this lecture. System Model Power Penalty Analog transmission Digital transmission

In this lecture. System Model Power Penalty Analog transmission Digital transmission System Model Power Penalty Analog transmission Digital transmission In this lecture Analog Data Transmission vs. Digital Data Transmission Analog to Digital (A/D) Conversion Digital to Analog (D/A) Conversion

More information

Physical Layer: Outline

Physical Layer: Outline 18-345: Introduction to Telecommunication Networks Lectures 3: Physical Layer Peter Steenkiste Spring 2015 www.cs.cmu.edu/~prs/nets-ece Physical Layer: Outline Digital networking Modulation Characterization

More information

BSc (Hons) Computer Science with Network Security, BEng (Hons) Electronic Engineering. Cohorts: BCNS/17A/FT & BEE/16B/FT

BSc (Hons) Computer Science with Network Security, BEng (Hons) Electronic Engineering. Cohorts: BCNS/17A/FT & BEE/16B/FT BSc (Hons) Computer Science with Network Security, BEng (Hons) Electronic Engineering Cohorts: BCNS/17A/FT & BEE/16B/FT Examinations for 2016-2017 Semester 2 & 2017 Semester 1 Resit Examinations for BEE/12/FT

More information

Amplitude Modulation II

Amplitude Modulation II Lecture 6: Amplitude Modulation II EE 3770: Communication Systems Lecture 6 Amplitude Modulation II AM Limitations DSB-SC Modulation SSB Modulation VSB Modulation Multiplexing Mojtaba Vaezi 6-1 Contents

More information

Part II Data Communications

Part II Data Communications Part II Data Communications Chapter 3 Data Transmission Concept & Terminology Signal : Time Domain & Frequency Domain Concepts Signal & Data Analog and Digital Data Transmission Transmission Impairments

More information

Introduction to Communications Part Two: Physical Layer Ch3: Data & Signals

Introduction to Communications Part Two: Physical Layer Ch3: Data & Signals Introduction to Communications Part Two: Physical Layer Ch3: Data & Signals Kuang Chiu Huang TCM NCKU Spring/2008 Goals of This Class Through the lecture of fundamental information for data and signals,

More information

Pulse Code Modulation

Pulse Code Modulation Pulse Code Modulation EE 44 Spring Semester Lecture 9 Analog signal Pulse Amplitude Modulation Pulse Width Modulation Pulse Position Modulation Pulse Code Modulation (3-bit coding) 1 Advantages of Digital

More information

CS601_MIDTERM_SOLVE_PAPER ( COMPOSED BY SADIA ALI SADII

CS601_MIDTERM_SOLVE_PAPER ( COMPOSED BY SADIA ALI SADII MIDTERM EXAMINATION Spring 2010 CS601- Data Communication Question No: 1 ( Marks: 1 ) - Please choose one Which topology requires a central controller or hub? _ Mesh _ Star p_29 _ Bus _ Ring Time: 60 min

More information

Terminology (1) Chapter 3. Terminology (3) Terminology (2) Transmitter Receiver Medium. Data Transmission. Direct link. Point-to-point.

Terminology (1) Chapter 3. Terminology (3) Terminology (2) Transmitter Receiver Medium. Data Transmission. Direct link. Point-to-point. Terminology (1) Chapter 3 Data Transmission Transmitter Receiver Medium Guided medium e.g. twisted pair, optical fiber Unguided medium e.g. air, water, vacuum Spring 2012 03-1 Spring 2012 03-2 Terminology

More information

QUESTION BANK SUBJECT: DIGITAL COMMUNICATION (15EC61)

QUESTION 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 information

2. TELECOMMUNICATIONS BASICS

2. TELECOMMUNICATIONS BASICS 2. TELECOMMUNICATIONS BASICS The purpose of any telecommunications system is to transfer information from the sender to the receiver by a means of a communication channel. The information is carried by

More information

Terminology (1) Chapter 3. Terminology (3) Terminology (2) Transmitter Receiver Medium. Data Transmission. Simplex. Direct link.

Terminology (1) Chapter 3. Terminology (3) Terminology (2) Transmitter Receiver Medium. Data Transmission. Simplex. Direct link. Chapter 3 Data Transmission Terminology (1) Transmitter Receiver Medium Guided medium e.g. twisted pair, optical fiber Unguided medium e.g. air, water, vacuum Corneliu Zaharia 2 Corneliu Zaharia Terminology

More information

Digital Communication

Digital 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 information

Downloaded from 1

Downloaded 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 information

Introduction: Presence or absence of inherent error detection properties.

Introduction: 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 information

ITM 1010 Computer and Communication Technologies

ITM 1010 Computer and Communication Technologies ITM 1010 Computer and Communication Technologies Lecture #14 Part II Introduction to Communication Technologies: Digital Signals: Digital modulation, channel sharing 2003 香港中文大學, 電子工程學系 (Prof. H.K.Tsang)

More information

Contents. Telecom Service Chae Y. Lee. Data Signal Transmission Transmission Impairments Channel Capacity

Contents. Telecom Service Chae Y. Lee. Data Signal Transmission Transmission Impairments Channel Capacity Data Transmission Contents Data Signal Transmission Transmission Impairments Channel Capacity 2 Data/Signal/Transmission Data: entities that convey meaning or information Signal: electric or electromagnetic

More information

ECE 435 Network Engineering Lecture 4

ECE 435 Network Engineering Lecture 4 ECE 435 Network Engineering Lecture 4 Vince Weaver http://web.eece.maine.edu/~vweaver vincent.weaver@maine.edu 12 September 2016 Announcements Homework 2 was posted late, due next Monday Homework 1 grades

More information

Year : TYEJ Sub: Digital Communication (17535) Assignment No. 1. Introduction of Digital Communication. Question Exam Marks

Year : 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 information

EEE 309 Communication Theory

EEE 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 information

COMP211 Physical Layer

COMP211 Physical Layer COMP211 Physical Layer Data and Computer Communications 7th edition William Stallings Prentice Hall 2004 Computer Networks 5th edition Andrew S.Tanenbaum, David J.Wetherall Pearson 2011 Material adapted

More information

Universitas Sumatera Utara

Universitas 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 information

AM Limitations. Amplitude Modulation II. DSB-SC Modulation. AM Modifications

AM Limitations. Amplitude Modulation II. DSB-SC Modulation. AM Modifications Lecture 6: Amplitude Modulation II EE 3770: Communication Systems AM Limitations AM Limitations DSB-SC Modulation SSB Modulation VSB Modulation Lecture 6 Amplitude Modulation II Amplitude modulation is

More information

Review of Lecture 2. Data and Signals - Theoretical Concepts. Review of Lecture 2. Review of Lecture 2. Review of Lecture 2. Review of Lecture 2

Review of Lecture 2. Data and Signals - Theoretical Concepts. Review of Lecture 2. Review of Lecture 2. Review of Lecture 2. Review of Lecture 2 Data and Signals - Theoretical Concepts! What are the major functions of the network access layer? Reference: Chapter 3 - Stallings Chapter 3 - Forouzan Study Guide 3 1 2! What are the major functions

More information