Vestigial Sideband Modulation KEEE343 Communication Theory Lecture #11, April 7, Prof. Young-Chai Ko
|
|
- Jasper Allison
- 6 years ago
- Views:
Transcription
1 Vestigial Sideband Modulation KEEE343 Communication Theory Lecture #11, April 7, 2011 Prof. Young-Chai Ko
2 Summary Vestigial sideband modulation Baseband representation of modulated wave Baseband representation of pass-band filter Frequency division multiplexing Introduction to Angle Modulation
3 Generation of LSB SSB Using Wideband Low-Pass Filter DSB Spectrum H L (f) SSB Spectrum H L (f) sgn(f ) sgn(f + )
4 Generation of USB SSB Using High-Pass (or Passband) Filter DSB Spectrum H HP (f) SSB Spectrum H HP (f) = sgn(f + ) + sgn(f + ) sgn(f + ) sgn(f )
5 SSB Modulated Wave Lower Sideband SSB s LSB (t) = 1 2 m(t) cos(2 t)+ 1 2 ˆm(t)sin(2 t) Upper sideband SSB s USB (t) = 1 2 m(t) cos(2 t) 1 2 ˆm(t)sin(2 t)
6 Applications of SSB and Difficulties in Implementing SSB Two difficulties of SSB modulations Designing and implementing the sharp Low-pass (or High-pass/pass-band) filter is not easy for circuit designer. Hence, the message signal which does not contain the significant energy in the DC area is often modulated by the SSB such as the speech signal. Spectrum of Speech Signal (Example) 0 [Hz] However, the SSB cannot be applicable for the message signal which contains the significant energy around zero frequency such as video signal, computer data, and etc.
7 Vestigial Sideband (VSB) Modulation VSB Modulation Modulation to overcome the two difficulties of the SSB modulations. Allow a small amount, or vestige, of the unwanted sideband to appear at the output of an SSB modulator The design of the sideband filter is simplified since the need for sharp cutoff at the carrier frequency is eliminated. In addition, a VSB system has improved low-frequency response and can even have dc response.
8 Idea of VSB Modulator Pass-band (or High-pass) filter for USB-SSB modulation 1 H U (f) The filter below is much easier to design and implement 1 1 f 1 + f 1
9 Consider the two-tone message signal given as m(t) =A cos(2 f 1 t)+b cos(2 f 2 t) Message signal multiplied by the carrier wave, that is, DSB signal e DSB (t) = (A cos(2 f 1 t)+bcos(2 f 2 t)) cos(2 t) = 1 2 A cos(2 ( + f 1 )t)+ 1 2 A cos(2 ( f 1 )t) B sin(2 ( + f 1 )t)+ 1 2 B sin(2 ( f 1 )t)
10 Spectrum of DSB signal 1 2 B A 1 2 A 2 B Frequency response of the VSB filter f 2 f 1 f + f 1 + f 2 c 1 1 Output response f 2 f 1 + f 1 + f 2 s(t) = 1 2 A cos(2 ( f 1 )t) A(1 ) cos(2 ( + f 1 )t) B cos(2 ( + f 2 )t) 1 2 A 1 [A(1 )] B f 1 + f 1 + f 2
11 Demodulation of VSB Signal (Coherent method) Downconvert (by Multiplying 4 cos(2 t) ) and low pass filtering Downconvert d(t) = s(t) 4 cos(2 t) = 1 2 A cos(2 ( f 1 )t) 4 cos(2 t) A(1 ) cos(2 ( + f 1 )t) 4 cos(2 t) B cos(2 ( + f 2 )t) 4 cos(2 t) cos(2 ( + f 1 )t) cos(2 t)= 1 apple cos(2 (2 + f 1 )t) + cos(2 f 1 t) 2 Low-Pass Filtering 1 2 cos(2 f 1t)
12 Signal after Low-pass filtering (t) = A cos(2 f 1 t)+a(1 ) cos(2 f 1 t)+b cos(2 f 2 t) = A cos(2 f 1 t)+b cos(2 f 2 t)
13 Television Signals [Ref: Haykin & Moher, Textbook]
14 Baseband Representation of Modulated Waves DSB modulated wave signal s DSB (t) =Am(t) cos(2 t) SSB modulated wave signal s SSB (t) = 1 2 Am(t) cos(2 t) ± 1 2 A ˆm(t)sin(2 t) In general, we can write the linear modulated wave as s(t) =s I (t) cos(2 t) s Q (t)sin(2 t) Carrier wave with frequency quadrature-phase version of the carrier c(t) = cos(2 t) ĉ(t) =sin(2 t) Orthogonal each other
15 We can rewrite the modulated wave as s(t) =s I (t)c(t) s Q (t)ĉ(t) in-phase component of s(t) quadrature(-phase) component of s(t) Introduce the complex envelop of the modulated wave s(t) s(t) =s I (t)+js Q (t) Define the complex carrier wave c(t) =c I (t) jc Q (t)
16 Consider the following s(t) exp(j2 t) = apple s I (t)+js Q (t) apple cos(2 t)+jsin(2 t) Real term apple s(t) exp(j2 t) = s I (t) cos(2 t) s Q (t) sin(2 t) Imaginary term apple s(t) exp(j2 t) = s I (t)sin(2 t)+s Q (t) cos(2 t) s(t) X apple s(t) exp(j2 t)
17 Now consider s(t) =s I (t)+js Q (t) =a(t)e j (t) where a(t) = q s 2 I (t)+js2 Q (t), (t) = tan 1 s Q(t) s I (t) Then we can represent the modulated wave as apple s(t) = < apple = < s(t)e j2 t a(t)e j[2 t+ (t)] = a(t) cos[2 t + (t)] apple = < a(t)e j (t) e j2 t
18 Three different representation of modulated wave using its equivalent baseband signal s(t) = s I (t) cos(2 t) s Q (t)sin(2 t) apple = < s(t)e j2 t = a(t) cos[2 t + (t)]
19 Superheterodyne Receiver [Ref: Haykin & Moher, Textbook]
20 Communication Chipset Architecture LNA Receiver PLL 2 ABB Section 90 0 PLL antenna switch ABB Digital Baseband IC Power Amplifier Switchplexer Transmitter module PA Ctrl 26MHz Osc. LDO s
21 Frequency-Division Multiplexing To transmit a number oommunication signals over the same channel, the signals must be kept apart so that they do not interfere with each other, and thus they can be separated at the receiving end. FDM (Frequency division multiplexing) TDM (Time division multiplexing) SDM (Space division multiplexing) CDM (Code division multiplexing)
22 Block Diagram of FDM
23 Angle Modulation Basic Definition of Angle Modulation s(t) =A c cos[ i (t)] = A c cos[2 t + c ] Phase modulation (PM) if i(t) =2 t + k p m(t) Frequency modulation (FM) if Z t i(t) =2 t +2 k f m( ) d 0
Angle Modulation KEEE343 Communication Theory Lecture #12, April 14, Prof. Young-Chai Ko
Angle Modulation KEEE343 Communication Theory Lecture #12, April 14, 2011 Prof. Young-Chai Ko koyc@korea.ac.kr Summary Frequency Division Multiplexing (FDM) Angle Modulation Frequency-Division Multiplexing
More informationFrequency 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 informationAM 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 informationAmplitude 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 informationModulations Analog Modulations Amplitude modulation (AM) Linear modulation Frequency modulation (FM) Phase modulation (PM) cos Angle modulation FM PM Digital Modulations ASK FSK PSK MSK MFSK QAM PAM Etc.
More informationOutline. 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 informationSpeech, music, images, and video are examples of analog signals. Each of these signals is characterized by its bandwidth, dynamic range, and the
Speech, music, images, and video are examples of analog signals. Each of these signals is characterized by its bandwidth, dynamic range, and the nature of the signal. For instance, in the case of audio
More informationAM 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 informationChapter 3: Analog Modulation Cengage Learning Engineering. All Rights Reserved.
Contemporary Communication Systems using MATLAB Chapter 3: Analog Modulation 2013 Cengage Learning Engineering. All Rights Reserved. 3.1 Preview In this chapter we study analog modulation & demodulation,
More information4- Single Side Band (SSB)
4- Single Side Band (SSB) It can be shown that: s(t) S.S.B = m(t) cos ω c t ± m h (t) sin ω c t -: USB ; +: LSB m(t) X m(t) cos ω c t -π/ cos ω c t -π/ + s S.S.B m h (t) X m h (t) ± sin ω c t 1 Tone Modulation:
More informationAmplitude Modulation, II
Amplitude Modulation, II Single sideband modulation (SSB) Vestigial sideband modulation (VSB) VSB spectrum Modulator and demodulator NTSC TV signsals Quadrature modulation Spectral efficiency Modulator
More informationCOMM 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 informationB.Tech II Year II Semester (R13) Supplementary Examinations May/June 2017 ANALOG COMMUNICATION SYSTEMS (Electronics and Communication Engineering)
Code: 13A04404 R13 B.Tech II Year II Semester (R13) Supplementary Examinations May/June 2017 ANALOG COMMUNICATION SYSTEMS (Electronics and Communication Engineering) Time: 3 hours Max. Marks: 70 PART A
More informationCommunication 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 informationAmplitude 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 informationMaster 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 informationAmplitude 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 informationUNIT-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 informationUNIT I AMPLITUDE MODULATION
UNIT I AMPLITUDE MODULATION Prepared by: S.NANDHINI, Assistant Professor, Dept. of ECE, Sri Venkateswara College of Engineering, Sriperumbudur, Tamilnadu. CONTENTS Introduction to communication systems
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 information3.1 Introduction to Modulation
Haberlesme Sistemlerine Giris (ELE 361) 9 Eylul 2017 TOBB Ekonomi ve Teknoloji Universitesi, Guz 2017-18 Dr. A. Melda Yuksel Turgut & Tolga Girici Lecture Notes Chapter 3 Amplitude Modulation Speech, music,
More informationAmplitude Modulation Chapter 2. Modulation process
Question 1 Modulation process Modulation is the process of translation the baseband message signal to bandpass (modulated carrier) signal at frequencies that are very high compared to the baseband frequencies.
More informationIntroduction 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(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! Amplitude of carrier wave varies a mean value in step with the baseband signal m(t)
page 7.1 CHAPTER 7 AMPLITUDE MODULATION Transmit information-bearing (message) or baseband signal (voice-music) through a Communications Channel Baseband = band of frequencies representing the original
More informationCode 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 informationIntroduction. Amplitude Modulation System Angle Modulation System
Introduction Amplitude Modulation System Angle Modulation System Frequency Modulation Phase Modulation Digital Communication Elements of Information Theory Advanced Communication Techniques 1 Tools for
More informationENSC327 Communications Systems 14: Multiplexing. School of Engineering Science Simon Fraser University
ENSC327 Communications Systems 14: Multiplexing School of Engineering Science Simon Fraser University 1 Outline Required background (Recall various modulation schemes) Different Multiplexing strategies:
More informationChapter 5. Amplitude Modulation
Chapter 5 Amplitude Modulation So far we have developed basic signal and system representation techniques which we will now apply to the analysis of various analog communication systems. In particular,
More informationCommunications and Signals Processing
Communications and Signals Processing Department of Communications An Najah National University 2012/2013 1 3.1 Amplitude Modulation 3.2 Virtues, Limitations, and Modifications of Amplitude Modulation
More informationENSC327 Communications Systems 14: Multiplexing. Jie Liang School of Engineering Science Simon Fraser University
ENSC327 Communications Systems 14: Multiplexing Jie Liang School of Engineering Science Simon Fraser University 1 Outline Multiplexing allows signals to share channels Many different strategies are possible
More information1B Paper 6: Communications Handout 2: Analogue Modulation
1B Paper 6: Communications Handout : Analogue Modulation Ramji Venkataramanan Signal Processing and Communications Lab Department of Engineering ramji.v@eng.cam.ac.uk Lent Term 16 1 / 3 Modulation Modulation
More informationS.E. (Electronics/Electronics and Telecommunication Engg.) (Second Semester) EXAMINATION, 2014 COMMUNICATION THEORY (2008 PATTERN)
Total No. of Questions 12] [Total No. of Printed Pages 7 Seat No. [4657]-49 S.E. (Electronics/Electronics and Telecommunication Engg.) (Second Semester) EXAMINATION, 2014 COMMUNICATION THEORY (2008 PATTERN)
More informationLecture 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 informationEC2252: COMMUNICATION THEORY SEM / YEAR: II year DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING
EC2252: COMMUNICATION THEORY SEM / YEAR: II year DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING QUESTION BANK SUBJECT CODE : EC2252 SEM / YEAR : II year SUBJECT NAME : COMMUNICATION THEORY UNIT
More informationS.R.M. Institute of Science & Technology School of Electronics & Communication Engineering
S.R.M. Institute of Science & Technology School of Electronics & Communication Engineering QUESTION BANK Subject Code : EC314 Subject Name : Communication Engineering Year & Sem : III Year, 6th Sem (EEE)
More informationLecture 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 informationS.R.M Institute of Science and Technology (Deemed University) Department of Electronics & Communication Engineering
S.R.M Institute of Science and Technology (Deemed University) Department of Electronics & Communication Engineering QUESTION BANK Subject Code : EC211 Subject Name : Communication Engineering Year & Sem
More informationCHAPTER 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 informationLecture 12 - Analog Communication (II)
Lecture 12 - Analog Communication (II) James Barnes (James.Barnes@colostate.edu) Spring 2014 Colorado State University Dept of Electrical and Computer Engineering ECE423 1 / 12 Outline QAM: quadrature
More informationCOMMUNICATION SYSTEMS-II (In continuation with Part-I)
MODULATING A SIGNAL COMMUNICATION SYSTEMS-II (In continuation with Part-I) TRANSMITTING SIGNALS : In order to transmit the original low frequency baseband message efficiently over long distances, the signal
More informationChapter 7. Multiple Division Techniques
Chapter 7 Multiple Division Techniques 1 Outline Frequency Division Multiple Access (FDMA) Division Multiple Access (TDMA) Code Division Multiple Access (CDMA) Comparison of FDMA, TDMA, and CDMA Walsh
More informationTwelve 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 informationAnalog 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 informationTechnician 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 informationCharan Langton, Editor
Charan Langton, Editor SIGNAL PROCESSING & SIMULATION NEWSLETTER Baseband, Passband Signals and Amplitude Modulation The most salient feature of information signals is that they are generally low frequency.
More informationModulation 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 information3.1 Introduction 3.2 Amplitude Modulation 3.3 Double Sideband-Suppressed Carrier Modulation 3.4 Quadrature-Carrier Multiplexing 3.
Chapter 3 Amplitude Modulation Wireless Information Transmission System Lab. Institute of Communications Engineering g National Sun Yat-sen University Outline 3.1 Introduction 3. Amplitude Modulation 3.3
More informationEE4512 Analog and Digital Communications Chapter 6. Chapter 6 Analog Modulation and Demodulation
Chapter 6 Analog Modulation and Demodulation Chapter 6 Analog Modulation and Demodulation Amplitude Modulation Pages 306-309 309 The analytical signal for double sideband, large carrier amplitude modulation
More informationCommunication 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 - 10 Single Sideband Modulation We will discuss, now we will continue
More informationWireless 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 informationTechnician 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 informationLecture-3 Amplitude Modulation: Single Side Band (SSB) Modulation
Lecture-3 Amplitude Modulation: Single Side Band (SSB) Modulation 3.0 Introduction. 3.1 Baseband Signal SSB Modulation. 3.1.1 Frequency Domain Description. 3.1. Time Domain Description. 3. Single Tone
More informationChapter 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 informationDr. Md. Farhad Hossain Associate Professor Department of EEE, BUET
EEE 309 Communiation Theory Semester: January 06 Dr. Md. Farhad Hossain Assoiate Proessor Department o EEE, BUET Email: marhadhossain@eee.buet.a.bd Oie: ECE 33, ECE Building Part 03-3 Single-sideband Suppressed
More informationEE470 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 informationReal and Complex Modulation
Real and Complex Modulation TIPL 4708 Presented by Matt Guibord Prepared by Matt Guibord 1 What is modulation? Modulation is the act of changing a carrier signal s properties (amplitude, phase, frequency)
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 informationAmplitude Modulation Early Radio EE 442 Spring Semester Lecture 6
Amplitude Modulation Early Radio EE 442 Spring Semester Lecture 6 f f f LO audio baseband m http://www.technologyuk.net/telecommunications/telecom_principles/amplitude_modulation.shtml AM Modulation --
More informationDT 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 informationChapter 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 informationAmplitude Modulation
Amplitude Modulation Ang Man Shun October 30, 01 Reference Hwei P. Hsu Analog and Digital Communication Summary Message Carrier Simple AM DSB-LC DSB-SC SSB / VSB Equation m(t) Large Carrier Unity A m cos
More informationAmplitude 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 informationpage 7.51 Chapter 7, sections , pp Angle Modulation No Modulation (t) =2f c t + c Instantaneous Frequency 2 dt dt No Modulation
page 7.51 Chapter 7, sections 7.1-7.14, pp. 322-368 Angle Modulation s(t) =A c cos[(t)] No Modulation (t) =2f c t + c s(t) =A c cos[2f c t + c ] Instantaneous Frequency f i (t) = 1 d(t) 2 dt or w i (t)
More informationELEC 350 Communications Theory and Systems: I. Review. ELEC 350 Fall
ELEC 350 Communications Theory and Systems: I Review ELEC 350 Fall 007 1 Final Examination Saturday, December 15-3 hours Two pages of notes allowed Calculator Tables provided Fourier transforms Table.1
More informationANALOGUE 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 informationCS311: 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 informationChapter 7 Single-Sideband Modulation (SSB) and Frequency Translation
Chapter 7 Single-Sideband Modulation (SSB) and Frequency Translation Contents Slide 1 Single-Sideband Modulation Slide 2 SSB by DSBSC-AM and Filtering Slide 3 SSB by DSBSC-AM and Filtering (cont.) Slide
More information4.1 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 informationKINGS COLLEGE OF ENGINEERING DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING QUESTION BANK
KINGS COLLEGE OF ENGINEERING DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING QUESTION BANK SUB.NAME : COMMUNICATION THEORY SUB.CODE: EC1252 YEAR : II SEMESTER : IV UNIT I AMPLITUDE MODULATION SYSTEMS
More informationANALOG COMMUNICATION
ANALOG COMMUNICATION TRAINING LAB Analog Communication Training Lab consists of six kits, one each for Modulation (ACL-01), Demodulation (ACL-02), Modulation (ACL-03), Demodulation (ACL-04), Noise power
More informationENSC327 Communications Systems 4. Double Sideband Modulation. Jie Liang School of Engineering Science Simon Fraser University
ENSC327 Communiations Systems 4. Double Sideband Modulation Jie Liang Shool of Engineering Siene Simon Fraser University 1 Outline DSB: Modulator Spetrum Coherent Demodulator: Three methods Quadrature-arrier
More informationELEC 350 Communications Theory and Systems: I. Analog Signal Transmission and Reception. ELEC 350 Fall
ELEC 350 Communiations Theory and Systems: I Analog Signal Transmission and Reeption ELEC 350 Fall 2007 1 ELEC 350 Fall 2007 2 Analog Modulation A large number o signals are analog speeh musi video These
More informationAngle 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 informationElements 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 informationRadio 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 informationEmona Telecoms-Trainer ETT-101
EXPERIMENTS IN MODERN COMMUNICATIONS Emona Telecoms-Trainer ETT-101 Multi-Experiment Single Board Telecommunications Trainer for Technical College and Technical High School Students EMONA INSTRUMENTS www.ett101.com
More informationPHASE DIVISION MULTIPLEX
PHASE DIVISION MULTIPLEX PREPARATION... 70 the transmitter... 70 the receiver... 71 EXPERIMENT... 72 a single-channel receiver... 72 a two-channel receiver... 73 TUTORIAL QUESTIONS... 74 Vol A2, ch 8,
More informationEECS 307: Lab Handout 2 (FALL 2012)
EECS 307: Lab Handout 2 (FALL 2012) I- Audio Transmission of a Single Tone In this part you will modulate a low-frequency audio tone via AM, and transmit it with a carrier also in the audio range. 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 informationChapter-15. Communication systems -1 mark Questions
Chapter-15 Communication systems -1 mark Questions 1) What are the three main units of a Communication System? 2) What is meant by Bandwidth of transmission? 3) What is a transducer? Give an example. 4)
More informationINTRODUCTION TO TRANSCEIVER DESIGN ECE3103 ADVANCED TELECOMMUNICATION SYSTEMS
INTRODUCTION TO TRANSCEIVER DESIGN ECE3103 ADVANCED TELECOMMUNICATION SYSTEMS FUNCTIONS OF A TRANSMITTER The basic functions of a transmitter are: a) up-conversion: move signal to desired RF carrier frequency.
More informationAmplitude Modulation. Amplitude Modulation. Amplitude Modulation. Amplitude Modulation. A. Introduction. A. Introduction
1. In AM modulation we impart the information of a message signal m(t) on to a sinusoidal carrier c(t). This results in the translation of the message signal to a new frequency range. The motivation for
More informationThe Communications Channel (Ch.11):
ECE-5 Phil Schniter February 5, 8 The Communications Channel (Ch.): The eects o signal propagation are usually modeled as: ECE-5 Phil Schniter February 5, 8 Filtering due to Multipath Propagation: The
More informationM(f) = 0. Linear modulation: linear relationship between the modulated signal and the message signal (ex: AM, DSB-SC, SSB, VSB).
4 Analog modulation 4.1 Modulation formats The message waveform is represented by a low-pass real signal mt) such that Mf) = 0 f W where W is the message bandwidth. mt) is called the modulating signal.
More information6. 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 informationAN INTRODUCTION OF ANALOG AND DIGITAL MODULATION TECHNIQUES IN COMMUNICATION SYSTEM
AN INTRODUCTION OF ANALOG AND DIGITAL MODULATION TECHNIQUES IN COMMUNICATION SYSTEM Rashmi Pandey Vedica Institute of Technology, Bhopal Department of Electronics & Communication rashmipandey07@rediffmail.com
More informationKeywords Internet, LabVIEW, Smart Classroom-cum-Laboratory, Teaching and Learning process of communication.
Volume 4, Issue 10, October 2014 ISSN: 2277 128X International Journal of Advanced Research in Computer Science and Software Engineering Research Paper Available online at: www.ijarcsse.com Smart Classroom-cum-Laboratory
More informationENSC327 Communications Systems 4. Double Sideband Modulation. School of Engineering Science Simon Fraser University
ENSC327 Communiations Systems 4. Double Sideband Modulation Shool of Engineering Siene Simon Fraser University 1 Outline Required Bakground DSB: Modulator Spetrum Coherent Demodulator: Three methods Quadrature-arrier
More informationV. CHANDRA SEKAR Professor and Head Department of Electronics and Communication Engineering SASTRA University, Kumbakonam
V. CHANDRA SEKAR Professor and Head Department of Electronics and Communication Engineering SASTRA University, Kumbakonam 1 Contents Preface v 1. Introduction 1 1.1 What is Communication? 1 1.2 Modulation
More informationANALOG COMMUNICATIONS. BY P.Swetha, Assistant Professor (Units 1, 2 & 5) K.D.K.Ajay, Assistant Professor (Units 3 & 4)
ANALOG COMMUNICATIONS BY P.Swetha, Assistant Professor (Units 1, 2 & 5) K.D.K.Ajay, Assistant Professor (Units 3 & 4) (R15A0409) ANALOG COMMUNICATIONS Course Objectives: Objective of the course is to:
More informationSuperheterodyne Receiver Tutorial
1 of 6 Superheterodyne Receiver Tutorial J P Silver E-mail: john@rfic.co.uk 1 ABSTRACT This paper discusses the basic design concepts of the Superheterodyne receiver in both single and double conversion
More informationtwo computers. 2- Providing a channel between them for transmitting and receiving the signals through it.
1. Introduction: Communication is the process of transmitting the messages that carrying information, where the two computers can be communicated with each other if the two conditions are available: 1-
More informationObjectives. 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 informationDigital 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 informationA Complete Set of Experiments for Communication Classes
A Complete Set of Experiments for Communication Classes Firas Hassan Ohio Northern University, Ada, OH 45810 f-hassan@onu.edu Abstract In this paper, a set of module based hands-on experiments that cover
More informationAmplitude Modulation
Amplitude Modulation Manasvi Grover Electronics and Communications Department Northern India Engineering College, New Delhi, India Maninder Bir Singh Gulshan Electronics and Communications Department Northern
More informationSOME FEATURES OF SIGNAL DEMODULATION RESULTING FROM THE PRACTICAL IMPLEMENTATION OF A DIRECT CONVERSION RADIO RECEIVER
Philips J. Res. 41, 219-231, 1986 R1l27 SOME FEATURES OF SIGNAL DEMODULATION RESULTING FROM THE PRACTICAL IMPLEMENTATION OF A DIRECT CONVERSION RADIO RECEIVER by R. A. BROWN, R. J. DEWEY and C. J. COLLIER
More informationUNIT 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 informationIntroduction to Receivers
Introduction to Receivers Purpose: translate RF signals to baseband Shift frequency Amplify Filter Demodulate Why is this a challenge? Interference Large dynamic range required Many receivers must be capable
More information