ECE513 RF Design for Wireless

Size: px
Start display at page:

Download "ECE513 RF Design for Wireless"

Transcription

1 1 ECE513 RF Design for Wireless MODULE 1 RF Systems LECTURE 1 Modulation Techniques Chapter 1, Sections Professor Michael Steer

2 2 Module 1: RF Systems Amplifiers, Mixers & Oscillators Antennas and RF Link Radio Frequency Systems Aim is to develop a full appreciation of an RF communication, focus is on a cellular radio system. System requirements drive component and subsystem development. Also capabilities of components and subsystems drive systems.

3 3 Module 1: Lecture 1 Amplifiers, Mixers & Oscillators RF Front Ends RF signals Analog Modulation Digital Modulation

4 4 Lecture Goal Develop an understanding of modulation techniques used in analog and digital cellular radio. Lecture Outline Analog Modulation: AM, FM, PM Introduction to Digital Modulation: ASK, FSK, PSK Advanced Modulation Concepts Occupied Bandwidth Performance of Modulation Types used in Cellular Radio Analog FM, DQPSK, FSK, GMSK

5 5 A Modulator I K WAVEFORM SHAPING I i(t) a(t) SERIAL BIT STREAM SERIAL TO PARALLEL VCO 90 s(t) Q K WAVEFORM SHAPING q(t) Q b(t)

6 6 Performance of Different Modulation Types Each type of modulation has advantages and drawbacks: Necessary bandwidth How wide is the signal? How much spectrum is needed? How big a "guard band" is needed between channels? Relative vulnerability to interference What C/I ratio is required for good system performance? Relative difficulty of implementation Is complex equipment required? Implementation cost? Maintainability

7 7 Analog Modulation Modulation is the process of varying some characteristic of a radio signal in order to convey information Time This analog waveform modulates a sinewave. The basic, unchanging, steady radio signal without modulation is called a carrier. Characteristics that can be modulated: Amplitude e.g. AM radio broadcasting Frequency e.g. FM broadcasting, Voice transmission in AMPS cellular Phase Note that frequency and phase modulation look very similar with this kind of input.

8 8 Amplitude Modulation (AM) [ ] xt ( ) = A 1+ mcosω t cosω t c m c The First Radio System to Transmit Voice were based on amplitude modulation.

9 9 Peak-to-Average Ratio CW Envelope AM (100%) ENVELOPE v peak v average = ½ v peak PAR = 4.26 db RF Power FM PAR = 0 db With FM amplitude distortion does not matter as there is no information in the amplitude of the signal.

10 10 PAR Peak-to-Average Ratio of AM [ ] xt ( ) = A 1+ mcosω t cosω t c m c PAR is an important metric for modulation formats Determines how amplifier must be designed for specified distortion. [ ] xpeak ( t ) = Ac 1 + m cos ω t c

11 11 PAR 1/4 [ ] x ( ) 1 cos PEAK t = Ac + m ωct

12 12 PAR 2/4 τ 1 2 avg lim τ 2τ ( ) τ P = Gv t. dt.

13 13 PAR 3/4 [ ω ] xt ( ) = A 1+ mcos t cosω t c m c

14 14 PAR 4/4 [ ω ] xt ( ) = A 1+ mcos t cosω t c m c

15 15 Analog FM How Much Bandwidth is Required? Time Carrier -3f i Input Signal -2f i -f i c +f i f i = input signal frequency frequency deviation Frequency Sidebands +2f i +3f i Frequency As time passes, the carrier moves back and forth in frequency in exact step with the input signal frequency deviation is proportional to the input signal voltage a group of many sidebands is created, spaced from carrier by amounts N x f i relative strength of each sideband N depends on Bessel function N of (input signal freq./freq. deviation) strength of individual sidebands far away from the carrier is proportional to (freq. deviation x input frequency) Carson s Rule Bandwidth Required = 2 x (highest input frequency + frequency deviation)

16 16 Analog Modulation and Bandwidth Time-Domain (as viewed on an Oscilloscope) Time Frequency-Domain (as viewed on a Spectrum Analyzer) 0 Lower Sideband Frequency Upper Sideband The bandwidth occupied by a signal depends on: input information bandwidth modulation method Information to be transmitted, called input or baseband bandwidth usually is small, much lower than frequency oarrier Unmodulated carrier the carrier itself has Zero bandwidth!! AM-modulated carrier Notice the upper & lower sidebands total bandwidth = 2 x baseband FM-modulated carrier Many sidebands! bandwidth is a complex mathematical function PM-modulated carrier Many sidebands! bandwidth is a complex mathematical function

17 17 Analog Modulation and PAR Time 0 Frequency CARRIER 100% AM Lower Sideband Upper Sideband FM PM

18 18 Narrow Band Communication The majority of modulation formats result in narrow band communication systems AM These were the easiest modulation schemes for most of the 20 th century and dictated the assignment of radio into narrow band channels. FDMA AMPLITUDE FREQUENCY 1912: Regulation began with the sinking of the Titanic.

19 19 Frequency Modulation & Bandwidth Time-Domain (as viewed on an Oscilloscope) Time Frequency-Domain (as viewed on a Spectrum Analyzer) 0 Frequency The bandwidth occupied by a signal depends on: input information bandwidth modulation method Information to be transmitted, called input or baseband bandwidth usually is small, much lower than frequency oarrier FM-modulated carrier Many sidebands! bandwidth is a complex mathematical function The bandwidth requirement for a frequency modulated signal is difficult to determine for arbitrary modulating signals as the frequency spectrum of this signal extends indefinitely but the amplitude of the spectrum falls off rapidly.

20 20 Analog FM How Much Bandwidth is Required? Time Carrier -3f i Input Signal -2f i -f i c +f i f i = input signal frequency frequency deviation Frequency Sidebands +2f i +3f i Frequency As time passes, the carrier moves back and forth in frequency in exact step with the input signal frequency deviation is proportional to the input signal voltage a group of many sidebands is created, spaced from carrier by amounts N x f i relative strength of each sideband N depends on Bessel function N of (input signal freq./freq. deviation) strength of individual sidebands far away from the carrier is proportional to (freq. deviation x input frequency) Carson s Rule Bandwidth Required = 2 x (highest input frequency + frequency deviation)

21 21 Narrowband and Wideband FM The difference is between what are called Narrowband FM and Wideband FM. The best rule of thumb formula is Carson s Rule: Bandwidth Required = B R = 2 x (highest input frequency + frequency deviation) Let's replace this by B R = Bandwidth Required F = frequency deviation f m = highest input frequency (bandwidth of modulating signal) So B R = 2 * ( F + f m ) Narrowband FM is when F << f m and then it can be shown that the bandwidth required is 2 * f m but only for Frequency Shift Keying (FSK) which is a two state form of FM. Wideband FM is when F >> f m and then it can be shown that the bandwidth required is 2 * F.

Modulation, Transmitters and Receivers

Modulation, Transmitters and Receivers CHAPTER 1 Modulation, Transmitters and Receivers 1.1 Introduction........................................................... 1 1.2 RF Signals............................................................

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

Outline. Communications Engineering 1

Outline. Communications Engineering 1 Outline Introduction Signal, random variable, random process and spectra Analog modulation Analog to digital conversion Digital transmission through baseband channels Signal space representation Optimal

More information

Angle Modulated Systems

Angle Modulated Systems Angle Modulated Systems Angle of carrier signal is changed in accordance with instantaneous amplitude of modulating signal. Two types Frequency Modulation (FM) Phase Modulation (PM) Use Commercial radio

More information

Analog Communication.

Analog Communication. Analog Communication Vishnu N V Tele is Greek for at a distance, and Communicare is latin for to make common. Telecommunication is the process of long distance communications. Early telecommunications

More information

Chapter 3 Communication Concepts

Chapter 3 Communication Concepts Chapter 3 Communication Concepts 1 Sections to be covered 3.1 General Considerations 3.2 Analog Modulation 3.3 Digital Modulation 3.4 Spectral Regrowth 3.7 Wireless Standards 2 Chapter Outline Modulation

More information

UNIT-2 Angle Modulation System

UNIT-2 Angle Modulation System UNIT-2 Angle Modulation System Introduction There are three parameters of a carrier that may carry information: Amplitude Frequency Phase Frequency Modulation Power in an FM signal does not vary with modulation

More information

EE470 Electronic Communication Theory Exam II

EE470 Electronic Communication Theory Exam II EE470 Electronic Communication Theory Exam II Open text, closed notes. For partial credit, you must show all formulas in symbolic form and you must work neatly!!! Date: November 6, 2013 Name: 1. [16%]

More information

ELEC3242 Communications Engineering Laboratory Frequency Shift Keying (FSK)

ELEC3242 Communications Engineering Laboratory Frequency Shift Keying (FSK) ELEC3242 Communications Engineering Laboratory 1 ---- Frequency Shift Keying (FSK) 1) Frequency Shift Keying Objectives To appreciate the principle of frequency shift keying and its relationship to analogue

More information

Master Degree in Electronic Engineering

Master Degree in Electronic Engineering Master Degree in Electronic Engineering Analog and telecommunication electronic course (ATLCE-01NWM) Miniproject: Baseband signal transmission techniques Name: LI. XINRUI E-mail: s219989@studenti.polito.it

More information

Lecture 6. Angle Modulation and Demodulation

Lecture 6. Angle Modulation and Demodulation Lecture 6 and Demodulation Agenda Introduction to and Demodulation Frequency and Phase Modulation Angle Demodulation FM Applications Introduction The other two parameters (frequency and phase) of the carrier

More information

Chapter 7 Multiple Division Techniques for Traffic Channels

Chapter 7 Multiple Division Techniques for Traffic Channels Introduction to Wireless & Mobile Systems Chapter 7 Multiple Division Techniques for Traffic Channels Outline Introduction Concepts and Models for Multiple Divisions Frequency Division Multiple Access

More information

TSEK02: Radio Electronics Lecture 2: Modulation (I) Ted Johansson, EKS, ISY

TSEK02: Radio Electronics Lecture 2: Modulation (I) Ted Johansson, EKS, ISY TSEK02: Radio Electronics Lecture 2: Modulation (I) Ted Johansson, EKS, ISY 2 Basic Definitions Time and Frequency db conversion Power and dbm Filter Basics 3 Filter Filter is a component with frequency

More information

Twelve voice signals, each band-limited to 3 khz, are frequency -multiplexed using 1 khz guard bands between channels and between the main carrier

Twelve voice signals, each band-limited to 3 khz, are frequency -multiplexed using 1 khz guard bands between channels and between the main carrier Twelve voice signals, each band-limited to 3 khz, are frequency -multiplexed using 1 khz guard bands between channels and between the main carrier and the first channel. The modulation of the main carrier

More information

Modulation in Telemetry Chapter 3

Modulation in Telemetry Chapter 3 TEMPEST Engineering and Hardware Design Dr. Bruce C. Gabrielson, NCE 1998 Modulation in Telemetry Chapter 3 Introduction Relative to low power signal transmission, not only must an engineer be able to

More information

UNIT 1 QUESTIONS WITH ANSWERS

UNIT 1 QUESTIONS WITH ANSWERS UNIT 1 QUESTIONS WITH ANSWERS 1. Define modulation? Modulation is a process by which some characteristics of high frequency carrier signal is varied in accordance with the instantaneous value of the modulating

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

Chapter 3. Amplitude Modulation Fundamentals

Chapter 3. Amplitude Modulation Fundamentals Chapter 3 Amplitude Modulation Fundamentals Topics Covered 3-1: AM Concepts 3-2: Modulation Index and Percentage of Modulation 3-3: Sidebands and the Frequency Domain 3-4: AM Power 3-5: Single-Sideband

More information

Technician License Course Chapter 2. Lesson Plan Module 3 Modulation and Bandwidth

Technician License Course Chapter 2. Lesson Plan Module 3 Modulation and Bandwidth Technician License Course Chapter 2 Lesson Plan Module 3 Modulation and Bandwidth The Basic Radio Station What Happens During Radio Communication? Transmitting (sending a signal): Information (voice, data,

More information

TSEK02: Radio Electronics Lecture 2: Modulation (I) Ted Johansson, EKS, ISY

TSEK02: Radio Electronics Lecture 2: Modulation (I) Ted Johansson, EKS, ISY TSEK02: Radio Electronics Lecture 2: Modulation (I) Ted Johansson, EKS, ISY An Overview of Modulation Techniques: chapter 3.1 3.3.1 2 Introduction (3.1) Analog Modulation Amplitude Modulation Phase and

More information

Wireless Communication Fading Modulation

Wireless Communication Fading Modulation EC744 Wireless Communication Fall 2008 Mohamed Essam Khedr Department of Electronics and Communications Wireless Communication Fading Modulation Syllabus Tentatively Week 1 Week 2 Week 3 Week 4 Week 5

More information

COMM 601: Modulation I

COMM 601: Modulation I Prof. Ahmed El-Mahdy, Communications Department The German University in Cairo Text Books [1] Couch, Digital and Analog Communication Systems, 7 th edition, Prentice Hall, 2007. [2] Simon Haykin, Communication

More information

Technician License Course Chapter 2. Lesson Plan Module 2 Radio Signals and Waves

Technician License Course Chapter 2. Lesson Plan Module 2 Radio Signals and Waves Technician License Course Chapter 2 Lesson Plan Module 2 Radio Signals and Waves The Basic Radio Station What Happens During Radio Communication? Transmitting (sending a signal): Information (voice, data,

More information

Amplitude Modulated Systems

Amplitude Modulated Systems Amplitude Modulated Systems Communication is process of establishing connection between two points for information exchange. Channel refers to medium through which message travels e.g. wires, links, or

More information

Introduction to Amplitude Modulation

Introduction to Amplitude Modulation 1 Introduction to Amplitude Modulation Introduction to project management. Problem definition. Design principles and practices. Implementation techniques including circuit design, software design, solid

More information

INTRODUCTION TO COMMUNICATION SYSTEMS AND TRANSMISSION MEDIA

INTRODUCTION TO COMMUNICATION SYSTEMS AND TRANSMISSION MEDIA COMM.ENG INTRODUCTION TO COMMUNICATION SYSTEMS AND TRANSMISSION MEDIA 9/9/2017 LECTURES 1 Objectives To give a background on Communication system components and channels (media) A distinction between analogue

More information

College of information Technology Department of Information Networks Telecommunication & Networking I Chapter 5. Analog Transmission

College of information Technology Department of Information Networks Telecommunication & Networking I Chapter 5. Analog Transmission Analog Transmission 5.1 DIGITAL-TO-ANALOG CONVERSION Digital-to-analog conversion is the process of changing one of the characteristics of an analog signal based on the information in digital data. The

More information

Elements of Communication System Channel Fig: 1: Block Diagram of Communication System Terminology in Communication System

Elements of Communication System Channel Fig: 1: Block Diagram of Communication System Terminology in Communication System Content:- Fundamentals of Communication Engineering : Elements of a Communication System, Need of modulation, electromagnetic spectrum and typical applications, Unit V (Communication terminologies in communication

More information

CHAPTER 2! AMPLITUDE MODULATION (AM)

CHAPTER 2! AMPLITUDE MODULATION (AM) CHAPTER 2 AMPLITUDE MODULATION (AM) Topics 2-1 : AM Concepts 2-2 : Modulation Index and Percentage of Modulation 2-3 : Sidebands and the Frequency Domain 2-4 : Single-Sideband Modulation 2-5 : AM Power

More information

Experiment One: Generating Frequency Modulation (FM) Using Voltage Controlled Oscillator (VCO)

Experiment One: Generating Frequency Modulation (FM) Using Voltage Controlled Oscillator (VCO) Experiment One: Generating Frequency Modulation (FM) Using Voltage Controlled Oscillator (VCO) Modified from original TIMS Manual experiment by Mr. Faisel Tubbal. Objectives 1) Learn about VCO and how

More information

ISHIK UNIVERSITY Faculty of Science Department of Information Technology Fall Course Name: Wireless Networks

ISHIK UNIVERSITY Faculty of Science Department of Information Technology Fall Course Name: Wireless Networks ISHIK UNIVERSITY Faculty of Science Department of Information Technology 2017-2018 Fall Course Name: Wireless Networks Agenda Lecture 4 Multiple Access Techniques: FDMA, TDMA, SDMA and CDMA 1. Frequency

More information

ECE 4600 Communication Systems

ECE 4600 Communication Systems ECE 4600 Communication Systems Dr. Bradley J. Bazuin Associate Professor Department of Electrical and Computer Engineering College of Engineering and Applied Sciences Course Topics Course Introduction

More information

Lab Assignment #3 Analog Modulation (An Introduction to RF Signal, Noise and Distortion Measurements in the Frequency Domain)

Lab Assignment #3 Analog Modulation (An Introduction to RF Signal, Noise and Distortion Measurements in the Frequency Domain) Lab Assignment #3 Analog Modulation (An Introduction to RF Signal, Noise and Distortion Measurements in the Frequency Domain) By: Timothy X Brown, Olivera Notaros, Nishant Jadhav TLEN 5320 Wireless Systems

More information

Lecture Topics. Doppler CW Radar System, FM-CW Radar System, Moving Target Indication Radar System, and Pulsed Doppler Radar System

Lecture Topics. Doppler CW Radar System, FM-CW Radar System, Moving Target Indication Radar System, and Pulsed Doppler Radar System Lecture Topics Doppler CW Radar System, FM-CW Radar System, Moving Target Indication Radar System, and Pulsed Doppler Radar System 1 Remember that: An EM wave is a function of both space and time e.g.

More information

Introduction. In the frequency domain, complex signals are separated into their frequency components, and the level at each frequency is displayed

Introduction. In the frequency domain, complex signals are separated into their frequency components, and the level at each frequency is displayed SPECTRUM ANALYZER Introduction A spectrum analyzer measures the amplitude of an input signal versus frequency within the full frequency range of the instrument The spectrum analyzer is to the frequency

More information

Announcements : Wireless Networks Lecture 3: Physical Layer. Bird s Eye View. Outline. Page 1

Announcements : Wireless Networks Lecture 3: Physical Layer. Bird s Eye View. Outline. Page 1 Announcements 18-759: Wireless Networks Lecture 3: Physical Layer Please start to form project teams» Updated project handout is available on the web site Also start to form teams for surveys» Send mail

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

(b) What are the differences between FM and PM? (c) What are the differences between NBFM and WBFM? [9+4+3]

(b) What are the differences between FM and PM? (c) What are the differences between NBFM and WBFM? [9+4+3] Code No: RR220401 Set No. 1 1. (a) The antenna current of an AM Broadcast transmitter is 10A, if modulated to a depth of 50% by an audio sine wave. It increases to 12A as a result of simultaneous modulation

More information

Digital Communication System

Digital Communication System Digital Communication System Purpose: communicate information at required rate between geographically separated locations reliably (quality) Important point: rate, quality spectral bandwidth, power requirements

More information

Radio Technology and Architectures. 1 ENGN4521/ENGN6521: Embedded Wireless L#1

Radio Technology and Architectures. 1 ENGN4521/ENGN6521: Embedded Wireless L#1 Radio Technology and Architectures 1 ENGN4521/ENGN6521: Embedded Wireless L#1 Radio (Architectures) Spectrum plan and legal issues Radio Architectures and components 2 ENGN4521/ENGN6521: Embedded Wireless

More information

Amplitude Modulation. Ahmad Bilal

Amplitude Modulation. Ahmad Bilal Amplitude Modulation Ahmad Bilal 5-2 ANALOG AND DIGITAL Analog-to-analog conversion is the representation of analog information by an analog signal. Topics discussed in this section: Amplitude Modulation

More information

Angle Modulation, II. Lecture topics. FM bandwidth and Carson s rule. Spectral analysis of FM. Narrowband FM Modulation. Wideband FM Modulation

Angle Modulation, II. Lecture topics. FM bandwidth and Carson s rule. Spectral analysis of FM. Narrowband FM Modulation. Wideband FM Modulation Angle Modulation, II Lecture topics FM bandwidth and Carson s rule Spectral analysis of FM Narrowband FM Modulation Wideband FM Modulation Bandwidth of Angle-Modulated Waves Angle modulation is nonlinear

More information

UNIT-I AMPLITUDE MODULATION (2 Marks Questions and Answers)

UNIT-I AMPLITUDE MODULATION (2 Marks Questions and Answers) UNIT-I AMPLITUDE MODULATION (2 Marks Questions and Answers) 1. Define modulation? Modulation is a process by which some characteristics of high frequency carrier Signal is varied in accordance with the

More information

15.Calculate the local oscillator frequency if incoming frequency is F1 and translated carrier frequency

15.Calculate the local oscillator frequency if incoming frequency is F1 and translated carrier frequency DEPARTMENT OF ELECTRONICS & COMMUNICATION ENGINEERING SUBJECT NAME:COMMUNICATION THEORY YEAR/SEM: II/IV SUBJECT CODE: EC 6402 UNIT I:l (AMPLITUDE MODULATION) PART A 1. Compute the bandwidth of the AMP

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

AM, PM and FM mo m dula l ti t o i n

AM, PM and FM mo m dula l ti t o i n AM, PM and FM modulation What is amplitude modulation In order that a radio signal can carry audio or other information for broadcasting or for two way radio communication, it must be modulated or changed

More information

Lecture 2: Links and Signaling. CSE 123: Computer Networks Stefan Savage

Lecture 2: Links and Signaling. CSE 123: Computer Networks Stefan Savage Lecture 2: Links and Signaling CSE 123: Computer Networks Stefan Savage Lecture 2 Overview Signaling Channel characteristics Types of physical media Modulation Narrowband vs. Broadband Encoding schemes

More information

Lecture 13. Introduction to OFDM

Lecture 13. Introduction to OFDM Lecture 13 Introduction to OFDM Ref: About-OFDM.pdf Orthogonal frequency division multiplexing (OFDM) is well-known to be effective against multipath distortion. It is a multicarrier communication scheme,

More information

EE12: Laboratory Project (Part-2) AM Transmitter

EE12: Laboratory Project (Part-2) AM Transmitter EE12: Laboratory Project (Part-2) AM Transmitter ECE Department, Tufts University Spring 2008 1 Objective This laboratory exercise is the second part of the EE12 project of building an AM transmitter in

More information

Multiplexing Module W.tra.2

Multiplexing Module W.tra.2 Multiplexing Module W.tra.2 Dr.M.Y.Wu@CSE Shanghai Jiaotong University Shanghai, China Dr.W.Shu@ECE University of New Mexico Albuquerque, NM, USA 1 Multiplexing W.tra.2-2 Multiplexing shared medium at

More information

ECE5713 : Advanced Digital Communications

ECE5713 : Advanced Digital Communications ECE5713 : Advanced Digital Communications Bandpass Modulation MPSK MASK, OOK MFSK 04-May-15 Advanced Digital Communications, Spring-2015, Week-8 1 In-phase and Quadrature (I&Q) Representation Any bandpass

More information

28. What is meant by repetition rate of the AM envelope? (ADC,AU-2010) 29. Describe the upper and lower sidebands. (ADC, AU-2010) 30.

28. 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 information

Mobile & Wireless Networking. Lecture 2: Wireless Transmission (2/2)

Mobile & Wireless Networking. Lecture 2: Wireless Transmission (2/2) 192620010 Mobile & Wireless Networking Lecture 2: Wireless Transmission (2/2) [Schiller, Section 2.6 & 2.7] [Reader Part 1: OFDM: An architecture for the fourth generation] Geert Heijenk Outline of Lecture

More information

Overview of Digital Mobile Communications

Overview of Digital Mobile Communications Overview of Digital Mobile Communications Dong In Kim (dikim@ece.skku.ac.kr) Wireless Communications Lab 1 Outline Digital Communications Multiple Access Techniques Power Control for CDMA IMT-2000 System

More information

Description of the AM Superheterodyne Radio Receiver

Description of the AM Superheterodyne Radio Receiver Superheterodyne AM Radio Receiver Since the inception of the AM radio, it spread widely due to its ease of use and more importantly, it low cost. The low cost of most AM radios sold in the market is due

More information

SPREAD SPECTRUM COMMUNICATIONS. historical and technical overview. Bryan Bergeron, NUlN 27 Stearns Road, Suite 8 Brookline. Massachusetts

SPREAD SPECTRUM COMMUNICATIONS. historical and technical overview. Bryan Bergeron, NUlN 27 Stearns Road, Suite 8 Brookline. Massachusetts Bryan Bergeron, NUlN 27 Stearns Road, Suite 8 Brookline. Massachusetts 02 146 SPREAD SPECTRUM COMMUNICATIONS historical and technical overview A s we all know, the RF spectrum is a finite and exceedingly

More information

AM and FM MODULATION Lecture 5&6

AM and FM MODULATION Lecture 5&6 AM and FM MODULATION Lecture 5&6 Ir. Muhamad Asvial, MEng., PhD Center for Information and Communication Engineering Research Electrical Engineering Department University of Indonesia Kampus UI Depok,

More information

Angle Modulation. Frequency Modulation

Angle Modulation. Frequency Modulation Angle Modulation Contrast to AM Generalized sinusoid: v(t)=v max sin(ωt+φ) Instead of Varying V max, Vary (ωt+φ) Angle and Pulse Modulation - 1 Frequency Modulation Instantaneous Carrier Frequency f i

More information

ANALOG AND DIGITAL COMMUNICATION DATA AND PULSE COMMUNICATION HISTORY OF DATA COMMUNICATION, STANDARDS ORGANIZATIONS FOR DATA COMMUNICATION.

ANALOG AND DIGITAL COMMUNICATION DATA AND PULSE COMMUNICATION HISTORY OF DATA COMMUNICATION, STANDARDS ORGANIZATIONS FOR DATA COMMUNICATION. UNIT III DATA AND PULSE COMMUNICATION 3.1 DATA COMMUNICATION: HISTORY OF DATA COMMUNICATION, STANDARDS ORGANIZATIONS FOR DATA COMMUNICATION. Data communication can be defined as two personal computers

More information

Technician License Course Chapter 3 Types of Radios and Radio Circuits. Module 7

Technician License Course Chapter 3 Types of Radios and Radio Circuits. Module 7 Technician License Course Chapter 3 Types of Radios and Radio Circuits Module 7 Radio Block Diagrams Radio Circuits can be shown as functional blocks connected together. Knowing the description of common

More information

Pearson Education Limited Edinburgh Gate Harlow Essex CM20 2JE England and Associated Companies throughout the world

Pearson Education Limited Edinburgh Gate Harlow Essex CM20 2JE England and Associated Companies throughout the world Pearson Education Limited Edinburgh Gate Harlow Essex CM20 2JE England and Associated Companies throughout the world Visit us on the World Wide Web at: www.pearsoned.co.uk Pearson Education Limited 2014

More information

Mobile Communication An overview Lesson 03 Introduction to Modulation Methods

Mobile Communication An overview Lesson 03 Introduction to Modulation Methods Mobile Communication An overview Lesson 03 Introduction to Modulation Methods Oxford University Press 2007. All rights reserved. 1 Modulation The process of varying one signal, called carrier, according

More information

6. Modulation and Multiplexing Techniques

6. Modulation and Multiplexing Techniques 6. Modulation and Multiplexing Techniques The quality of analog transmission is S/N (signal to noise ratio). signal power S/N = ---------------------------- baseband noise power S/N can be greater than

More information

Part-I. Experiment 6:-Angle Modulation

Part-I. Experiment 6:-Angle Modulation Part-I Experiment 6:-Angle Modulation 1. Introduction 1.1 Objective This experiment deals with the basic performance of Angle Modulation - Phase Modulation (PM) and Frequency Modulation (FM). The student

More information

Lecture 15: Introduction to Mixers

Lecture 15: Introduction to Mixers EECS 142 Lecture 15: Introduction to Mixers Prof. Ali M. Niknejad University of California, Berkeley Copyright c 2005 by Ali M. Niknejad A. M. Niknejad University of California, Berkeley EECS 142 Lecture

More information

CHETTINAD COLLEGE OF ENGINEERING & TECHNOLOGY NH-67, TRICHY MAIN ROAD, PULIYUR, C.F , KARUR DT.

CHETTINAD COLLEGE OF ENGINEERING & TECHNOLOGY NH-67, TRICHY MAIN ROAD, PULIYUR, C.F , KARUR DT. CHETTINAD COLLEGE OF ENGINEERING & TECHNOLOGY NH-67, TRICHY MAIN ROAD, PULIYUR, C.F. 639 114, KARUR DT. DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING COURSE MATERIAL Subject Name: Analog & Digital

More information

EE390 Final Exam Fall Term 2002 Friday, December 13, 2002

EE390 Final Exam Fall Term 2002 Friday, December 13, 2002 Name Page 1 of 11 EE390 Final Exam Fall Term 2002 Friday, December 13, 2002 Notes 1. This is a 2 hour exam, starting at 9:00 am and ending at 11:00 am. The exam is worth a total of 50 marks, broken down

More information

DEPARTMENT 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 information

Chapter 1. Overview. 1.1 Introduction

Chapter 1. Overview. 1.1 Introduction 1 Chapter 1 Overview 1.1 Introduction The modulation of the intensity of optical waves has been extensively studied over the past few decades and forms the basis of almost all of the information applications

More information

Code No: R Set No. 1

Code No: R Set No. 1 Code No: R05220405 Set No. 1 II B.Tech II Semester Regular Examinations, Apr/May 2007 ANALOG COMMUNICATIONS ( Common to Electronics & Communication Engineering and Electronics & Telematics) Time: 3 hours

More information

Frequency Modulation KEEE343 Communication Theory Lecture #15, April 28, Prof. Young-Chai Ko

Frequency Modulation KEEE343 Communication Theory Lecture #15, April 28, Prof. Young-Chai Ko Frequency Modulation KEEE343 Communication Theory Lecture #15, April 28, 2011 Prof. Young-Chai Ko koyc@korea.ac.kr Summary Angle Modulation Properties of Angle Modulation Narrowband Frequency Modulation

More information

CS311: Data Communication. Transmission of Analog Signal - I

CS311: Data Communication. Transmission of Analog Signal - I CS311: Data Communication Transmission of Analog Signal - I by Dr. Manas Khatua Assistant Professor Dept. of CSE IIT Jodhpur E-mail: manaskhatua@iitj.ac.in Web: http://home.iitj.ac.in/~manaskhatua http://manaskhatua.github.io/

More information

Analog Devices Welcomes Hittite Microwave Corporation NO CONTENT ON THE ATTACHED DOCUMENT HAS CHANGED

Analog Devices Welcomes Hittite Microwave Corporation NO CONTENT ON THE ATTACHED DOCUMENT HAS CHANGED Analog Devices Welcomes Hittite Microwave Corporation NO CONTENT ON THE ATTACHED DOCUMENT HAS CHANGED www.analog.com www.hittite.com THIS PAGE INTENTIONALLY LEFT BLANK 17 Product Application Notes Introduction

More information

ANALOGUE TRANSMISSION OVER FADING CHANNELS

ANALOGUE TRANSMISSION OVER FADING CHANNELS J.P. Linnartz EECS 290i handouts Spring 1993 ANALOGUE TRANSMISSION OVER FADING CHANNELS Amplitude modulation Various methods exist to transmit a baseband message m(t) using an RF carrier signal c(t) =

More information

4.1 REPRESENTATION OF FM AND PM SIGNALS An angle-modulated signal generally can be written as

4.1 REPRESENTATION OF FM AND PM SIGNALS An angle-modulated signal generally can be written as 1 In frequency-modulation (FM) systems, the frequency of the carrier f c is changed by the message signal; in phase modulation (PM) systems, the phase of the carrier is changed according to the variations

More information

Communication Channels

Communication Channels Communication Channels wires (PCB trace or conductor on IC) optical fiber (attenuation 4dB/km) broadcast TV (50 kw transmit) voice telephone line (under -9 dbm or 110 µw) walkie-talkie: 500 mw, 467 MHz

More information

OBJECTIVES EQUIPMENT LIST

OBJECTIVES EQUIPMENT LIST 1 Reception of Amplitude Modulated Signals AM Demodulation OBJECTIVES The purpose of this experiment is to show how the amplitude-modulated signals are demodulated to obtain the original signal. Also,

More information

Objectives. Presentation Outline. Digital Modulation Revision

Objectives. 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 information

I-Q transmission. Lecture 17

I-Q transmission. Lecture 17 I-Q Transmission Lecture 7 I-Q transmission i Sending Digital Data Binary Phase Shift Keying (BPSK): sending binary data over a single frequency band Quadrature Phase Shift Keying (QPSK): sending twice

More information

DT Filters 2/19. Atousa Hajshirmohammadi, SFU

DT Filters 2/19. Atousa Hajshirmohammadi, SFU 1/19 ENSC380 Lecture 23 Objectives: Signals and Systems Fourier Analysis: Discrete Time Filters Analog Communication Systems Double Sideband, Sub-pressed Carrier Modulation (DSBSC) Amplitude Modulation

More information

4/29/2012. General Class Element 3 Course Presentation. Signals and Emissions. SignalSignals and Emissionsissions. Subelement G8

4/29/2012. General Class Element 3 Course Presentation. Signals and Emissions. SignalSignals and Emissionsissions. Subelement G8 General Class Element 3 Course Presentation ti ELEMENT 3 SUB ELEMENTS General Licensing Class Subelement G8 Signals and Emissions 2 Exam Questions, 2 Groups G1 Commission s Rules G2 Operating Procedures

More information

Prepared for the Engineers of Samsung Electronics RF transmitter & power amplifier

Prepared for the Engineers of Samsung Electronics RF transmitter & power amplifier Prepared for the Engineers of Samsung Electronics RF transmitter & power amplifier Changsik Yoo Dept. Electrical and Computer Engineering Hanyang University, Seoul, Korea 1 Wireless system market trends

More information

Data Conversion Circuits & Modulation Techniques. Subhasish Chandra Assistant Professor Department of Physics Institute of Forensic Science, Nagpur

Data Conversion Circuits & Modulation Techniques. Subhasish Chandra Assistant Professor Department of Physics Institute of Forensic Science, Nagpur Data Conversion Circuits & Modulation Techniques Subhasish Chandra Assistant Professor Department of Physics Institute of Forensic Science, Nagpur Data Conversion Circuits 2 Digital systems are being used

More information

Internal Examination I Answer Key DEPARTMENT OF CSE & IT. Semester: III Max.Marks: 100

Internal Examination I Answer Key DEPARTMENT OF CSE & IT. Semester: III Max.Marks: 100 NH 67, Karur Trichy Highways, Puliyur C.F, 639 114 Karur District Internal Examination I Answer Key DEPARTMENT OF CSE & IT Branch & Section: II CSE & IT Date & Time: 06.08.15 & 3 Hours Semester: III Max.Marks:

More information

DHANALAKSHMI SRINIVASAN COLLEGE OF ENGINEERING AND TECHNOLOGY CS6304- ANALOG AND DIGITAL COMMUNICATION BE-CSE/IT SEMESTER III REGULATION 2013 Faculty

DHANALAKSHMI SRINIVASAN COLLEGE OF ENGINEERING AND TECHNOLOGY CS6304- ANALOG AND DIGITAL COMMUNICATION BE-CSE/IT SEMESTER III REGULATION 2013 Faculty DHANALAKSHMI SRINIVASAN COLLEGE OF ENGINEERING AND TECHNOLOGY CS6304- ANALOG AND DIGITAL COMMUNICATION BE-CSE/IT SEMESTER III REGULATION 2013 Faculty Name: S.Kalpana, AP/ECE QUESTION BANK UNIT I ANALOG

More information

Amplitude Modulation Fundamentals

Amplitude Modulation Fundamentals 3 chapter Amplitude Modulation Fundamentals In the modulation process, the baseband voice, video, or digital signal modifies another, higher-frequency signal called the carrier, which is usually a sine

More information

EE-4022 Experiment 2 Amplitude Modulation (AM)

EE-4022 Experiment 2 Amplitude Modulation (AM) EE-4022 MILWAUKEE SCHOOL OF ENGINEERING 2015 Page 2-1 Student objectives: EE-4022 Experiment 2 Amplitude Modulation (AM) In this experiment the student will use laboratory modules to implement operations

More information

Communication Engineering Prof. Surendra Prasad Department of Electrical Engineering Indian Institute of Technology, Delhi

Communication Engineering Prof. Surendra Prasad Department of Electrical Engineering Indian Institute of Technology, Delhi Communication Engineering Prof. Surendra Prasad Department of Electrical Engineering Indian Institute of Technology, Delhi Lecture - 16 Angle Modulation (Contd.) We will continue our discussion on Angle

More information

UNIVERSITY OF BAHRAIN COLLEGE OF ENGINEERING DEPARTMENT OF ELECTRICAL AND ELECTRONIC ENGINEERING

UNIVERSITY OF BAHRAIN COLLEGE OF ENGINEERING DEPARTMENT OF ELECTRICAL AND ELECTRONIC ENGINEERING UNIVERSITY OF BAHRAIN COLLEGE OF ENGINEERING DEPARTMENT OF ELECTRICAL AND ELECTRONIC ENGINEERING EENG 373: DIGITAL COMMUNICATIONS EXPERIMENT NO. 5 BASEBAND MODULATION TECHIQUES Objective The main objectives

More information

A Modular Approach to Teaching Wireless Communications and Systems for ECET Students

A Modular Approach to Teaching Wireless Communications and Systems for ECET Students A Modular Approach to Teaching Wireless Communications and Systems for ECET Students James Z. Zhang, Robert Adams, Kenneth Burbank Department of Engineering and Technology Western Carolina University,

More information

Signals and Systems Lecture 9 Communication Systems Frequency-Division Multiplexing and Frequency Modulation (FM)

Signals and Systems Lecture 9 Communication Systems Frequency-Division Multiplexing and Frequency Modulation (FM) Signals and Systems Lecture 9 Communication Systems Frequency-Division Multiplexing and Frequency Modulation (FM) April 11, 2008 Today s Topics 1. Frequency-division multiplexing 2. Frequency modulation

More information

UNIT 2 DIGITAL COMMUNICATION DIGITAL COMMUNICATION-Introduction The techniques used to modulate digital information so that it can be transmitted via microwave, satellite or down a cable pair is different

More information

The Challenges of Precision Analog Modulation Measurement

The Challenges of Precision Analog Modulation Measurement The Challenges of Precision Analog Modulation Measurement Paul Roberts Fluke Precision Measurement Ltd Norwich, UK. +44 (0)1603 256781 paul.roberts@fluke.com Abstract - In today s digital world, many established

More information

Outline / Wireless Networks and Applications Lecture 3: Physical Layer Signals, Modulation, Multiplexing. Cartoon View 1 A Wave of Energy

Outline / Wireless Networks and Applications Lecture 3: Physical Layer Signals, Modulation, Multiplexing. Cartoon View 1 A Wave of Energy Outline 18-452/18-750 Wireless Networks and Applications Lecture 3: Physical Layer Signals, Modulation, Multiplexing Peter Steenkiste Carnegie Mellon University Spring Semester 2017 http://www.cs.cmu.edu/~prs/wirelesss17/

More information

AMPLITUDE MODULATION

AMPLITUDE MODULATION AMPLITUDE MODULATION PREPARATION...2 theory...3 depth of modulation...4 measurement of m... 5 spectrum... 5 other message shapes.... 5 other generation methods...6 EXPERIMENT...7 aligning the model...7

More information

RESEARCH ON METHODS FOR ANALYZING AND PROCESSING SIGNALS USED BY INTERCEPTION SYSTEMS WITH SPECIAL APPLICATIONS

RESEARCH ON METHODS FOR ANALYZING AND PROCESSING SIGNALS USED BY INTERCEPTION SYSTEMS WITH SPECIAL APPLICATIONS Abstract of Doctorate Thesis RESEARCH ON METHODS FOR ANALYZING AND PROCESSING SIGNALS USED BY INTERCEPTION SYSTEMS WITH SPECIAL APPLICATIONS PhD Coordinator: Prof. Dr. Eng. Radu MUNTEANU Author: Radu MITRAN

More information

Ham Radio Training. Level 1 Technician Level. Presented by Richard Bosch KJ4WBB

Ham Radio Training. Level 1 Technician Level. Presented by Richard Bosch KJ4WBB Ham Radio Training Level 1 Technician Level Presented by Richard Bosch KJ4WBB In this chapter, you ll learn about: What is a radio signal The characteristics of radio signals How modulation adds information

More information

Modulation Methods Frequency Modulation

Modulation Methods Frequency Modulation Modulation Methods Frequency Modulation William Sheets K2MQJ Rudolf F. Graf KA2CWL The use of frequency modulation (called FM) is another method of adding intelligence to a carrier signal. While simple

More information

Digital Communication System

Digital Communication System Digital Communication System Purpose: communicate information at certain rate between geographically separated locations reliably (quality) Important point: rate, quality spectral bandwidth requirement

More information

Local Oscillator Phase Noise and its effect on Receiver Performance C. John Grebenkemper

Local Oscillator Phase Noise and its effect on Receiver Performance C. John Grebenkemper Watkins-Johnson Company Tech-notes Copyright 1981 Watkins-Johnson Company Vol. 8 No. 6 November/December 1981 Local Oscillator Phase Noise and its effect on Receiver Performance C. John Grebenkemper All

More information