Digital Communication SystemsDigital... · 2019-11-06 · Introduction to Digital Communication,...
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10/15/2009 1:07 PM Institute for Electronics, signal Processing and Communication (IESK) http://iesk.et.uni-magdeburg.de Otto-von-Guericke Uni-Magdeburg 1 Digital Communication Systems Prof. Dr. A.S. Omar [email protected] Engr. Tariq J. S. Khanzada K[email protected] , K[email protected] FET,IESK, Unversity of Magdeburg , Germany International Master Studies in Electrical Engineering and Information Technology http://www.iesk.uni- magdeburg.de/hf_technik/hauptmenue/mitarbeiter_hf/prof__omar.html Omar http://www.iesk.uni-magdeburg.de/en/microwave_eng_-p- 1903/Hauptmen%C3%BC/Mitarbeiter+HF/tariq_j__s__khanzada.html Khanzada 10/15/2009 1:07 PM Institute for Electronics, signal Processing and Communication (IESK) http://iesk.et.uni-magdeburg.de Otto-von-Guericke Uni-Magdeburg 2 • Objectives • Contents • Course Details • Communication Systems & Basic Concepts • Introduction to OFDM and its concept Outline
Transcript of Digital Communication SystemsDigital... · 2019-11-06 · Introduction to Digital Communication,...
10/15/2009 1:07 PM
Institute for Electronics, signal Processing and Com
munication (IESK
)http://iesk.et.uni-m
agdeburg.de
Otto-von-Guericke
Uni-Magdeburg
1
Digital Communication Systems
Prof. Dr. A.S. Omar [email protected]. Tariq J. S. Khanzada [email protected], [email protected]
FET,IESK,
Unversity of Magdeburg , Germany
International Master Studies in
Electrical Engineering and Information Technology
http://www.iesk.uni-magdeburg.de/hf_technik/hauptmenue/mitarbeiter_hf/prof__omar.html Omar
http://www.iesk.uni-magdeburg.de/en/microwave_eng_-p-1903/Hauptmen%C3%BC/Mitarbeiter+HF/tariq_j__s__khanzada.html Khanzada
10/15/2009 1:07 PM
Institute for Electronics, signal Processing and Com
munication (IESK
)http://iesk.et.uni-m
agdeburg.de
Otto-von-Guericke
Uni-Magdeburg
2
• Objectives
• Contents
• Course Details
• Communication Systems & Basic Concepts
• Introduction to OFDM and its concept
Outline
6.Channel Capacity and Coding
7.Widedand Techniques,
Spread Spectrum
Communication
10/15/2009 1:07 PM
Institute for Electronics, signal Processing and Com
munication (IESK
)http://iesk.et.uni-m
agdeburg.de
Otto-von-Guericke
Uni-Magdeburg
3
In order to comprehend learning
• Digitize and Code Information Signals
• Transmit Digital Signals over different types of Channels
• De-noise and Decode received Digital Signals
• Characterize Communication Channels
Objectives
10/15/2009 1:07 PM
Institute for Electronics, signal Processing and Com
munication (IESK
)http://iesk.et.uni-m
agdeburg.de
Otto-von-Guericke
Uni-Magdeburg
4
Contents
•Sampling and Source Coding
•Base-Band Techniques (DM, ADM, PCM, DPCM)
•Pass-Band Techniques (ASK, PSK, FSK, QAM, MSK, GMSK)
•Wideband Techniques (SS-DS, SS-FH, CDMA, WCDMA, OFDM)
•Noise Reduction Techniques
•Terrestrial, Mobile and Satellite Communication Networks
10/15/2009 1:07 PM
Institute for Electronics, signal Processing and Com
munication (IESK
)http://iesk.et.uni-m
agdeburg.de
Otto-von-Guericke
Uni-Magdeburg
5
Teaching Lecture and exercises
Prerequisites Bachelor in Electrical Engineering or related studiesProbability and Random Processes
Weight Compulsory module for the Master Course “Electrical Engineering and Information Technology”
Exam Written test at the end of the course
Credit points 4 Credit points = 120 h (42 h time of attendance and 78 h autonomous work)
Work load 2 hours/week - lecture1 hours/week - exercises
Autonomous work Post processing of lectures,Preparation of exercises and exam
Responsibly Lectures Prof. Dr. A.S. Omar [email protected] M. Eng. Tariq J.S. Khanzada [email protected]
Location & Time Lectures (Every Tuesday 9:15-10:45 Building 22a, Room 04)Exercises (Every Alternate Thursday 9:15-10:45 Building 05,
Room 313)
Course Details
10/15/2009 1:07 PM
Institute for Electronics, signal Processing and Com
munication (IESK
)http://iesk.et.uni-m
agdeburg.de
Otto-von-Guericke
Uni-Magdeburg
6
Textbook
Digital Communication, 4th Ed.
John Proakis, MCGraw Hill 2000
Textbook website www.mhhe.com/engcs/electrical/proakis
Additional Books
Introduction to Digital Communication,
Rodger E. Zeimer and Roger L. Peterson,
Second Edition, Prentice Hall, 2001.
Communication Systems (4th ed.), A. B. Carlson
Digital Communications, by Bernard Sklar,
Second Edition, Prentice Hall, 2001
Communication Systems , Simon Haykin, 4th Ed.
Wiley, 2001, ISBN 0-471-17869-1
Useful literature Textbook
10/15/2009 1:07 PM
Institute for Electronics, signal Processing and Com
munication (IESK
)http://iesk.et.uni-m
agdeburg.de
Otto-von-Guericke
Uni-Magdeburg
7
Excercises & Resources
Exercises Theoritical problems about the topics covered in lectures
Implementation of concepts in programming language of the choice
Recommonded tool Matlab, C++, Java
Some Learning Web Resources
http://www.mathworks.com/moler/intro.pdfhttp://www.mathworks.com/access/helpdesk/help/techdoc/matlab.htmlhttp://jdsp.asu.edu/jdsp.html
www.complextoreal.com
10/15/2009 1:07 PM
Institute for Electronics, signal Processing and Com
munication (IESK
)http://iesk.et.uni-m
agdeburg.de
Otto-von-Guericke
Uni-Magdeburg
8
Device transfer information from one location (time) to another location (time)
Digital: Smoke, Morse Code Telegraph
Analog: Commercial Radio, TV
Digital: Data, Computer, HDTV
Communication
Nutzer
Text Box
Note: I have taken some slides below form the standard course books referred above and their author's literature: Khanzada
Nutzer
Text Box
10/15/2009 1:07 PM
Institute for Electronics, signal Processing and Com
munication (IESK
)http://iesk.et.uni-m
agdeburg.de
Otto-von-Guericke
Uni-Magdeburg
9
Communication Systems
Systems communicate in order to share information.
To communicate means to pass information from one place to another.
It is more convenient to convert information into a signal. Your concern
as a communication engineer is with the transmission and reception of
these signals.
10/15/2009 1:07 PM
Institute for Electronics, signal Processing and Com
munication (IESK
)http://iesk.et.uni-m
agdeburg.de
Otto-von-Guericke
Uni-Magdeburg
10
Components of Communication System
Channel(distortion)
TransmitterSource Receiver Destination
Noise
Block diagram of Communication System
10/15/2009 1:07 PM
Institute for Electronics, signal Processing and Com
munication (IESK
)http://iesk.et.uni-m
agdeburg.de
Otto-von-Guericke
Uni-Magdeburg
11
• Point to Point: Telephone, Fax
• Point to Multipoint: Broadcast (Radio, TV)
• Simplex: One Way
• Duplex: Two Ways
Types of Communication Systems
10/15/2009 1:07 PM
Institute for Electronics, signal Processing and Com
munication (IESK
)http://iesk.et.uni-m
agdeburg.de
Otto-von-Guericke
Uni-Magdeburg
12
Cost/Performance Trade Off
Cost PerformanceData Rate
Power Bit Error Probability
Transmission Range
Bandwidth Fault Tolerance
Adaptive to Environment
Complexity Security
Anti Jamming Capability
Low Probability of Interception
Design Consideration
Nutzer
Text Box
Note: I have taken thesse slides below form the standard course books referred above and their author's literature: Khanzada
Sampling
Freq. domain representation of Signals
Fourier Transform
Unit Impulse
Rectangular Pulse
Gate Funciton
Properties of the Fourier Transform
Linearity
Duality
Time Shifting
Scaling
Convolution
Convolution in time domain corresponds to the
multiplication in frequency domain & vice vera
a x1(t) + b x2(t) <=> a X1(f) + b X2(f)
Power Contents of a Signal
Autocorrelation Property
Sampling Property
sampled version of x(t)
information
source
information
sink
taken from
book by
SKLAR
TransmitRecieve
