communication theory
DESCRIPTION
LecturesTRANSCRIPT
Signal Processing for Communication
Modern Communication Theory
Dr. ir. Muhammad Nasir
Department of Electrical EngineeringThe University of Lahore
October 9, 2015
Introductory Lecture
1
2
Focus
This course focuses on three major topics
Wireless Communication
Communication Theory
Channel Coding
GoalThe goal of this course is to provide a broad understanding of wireless com-munication theory. In this course, we discuss the broad overview of com-munication theory and presents some error correcting techniques for reliabletransmission.
Dr. ir. Muhammad Nasir (UOL) Modern Communication Theory October 9, 2015 2 / 18
3
Focus
This course focuses on three major topics
Wireless Communication
Communication Theory
Channel Coding
GoalThe goal of this course is to provide a broad understanding of wireless com-munication theory. In this course, we discuss the broad overview of com-munication theory and presents some error correcting techniques for reliabletransmission.
Dr. ir. Muhammad Nasir (UOL) Modern Communication Theory October 9, 2015 2 / 18
4
Focus
This course focuses on three major topics
Wireless Communication
Communication Theory
Channel Coding
GoalThe goal of this course is to provide a broad understanding of wireless com-munication theory. In this course, we discuss the broad overview of com-munication theory and presents some error correcting techniques for reliabletransmission.
Dr. ir. Muhammad Nasir (UOL) Modern Communication Theory October 9, 2015 2 / 18
5
Focus
This course focuses on three major topics
Wireless Communication
Communication Theory
Channel Coding
GoalThe goal of this course is to provide a broad understanding of wireless com-munication theory. In this course, we discuss the broad overview of com-munication theory and presents some error correcting techniques for reliabletransmission.
Dr. ir. Muhammad Nasir (UOL) Modern Communication Theory October 9, 2015 2 / 18
6
Focus
This course focuses on three major topics
Wireless Communication
Communication Theory
Channel Coding
GoalThe goal of this course is to provide a broad understanding of wireless com-munication theory. In this course, we discuss the broad overview of com-munication theory and presents some error correcting techniques for reliabletransmission.
Dr. ir. Muhammad Nasir (UOL) Modern Communication Theory October 9, 2015 2 / 18
7
Objectives
Get some thoeratical knowledge about the system design and analysis ofbasic communication system.
Learn about the working and relationship of wireless communication, sig-nal processing and coding techniques.
Learn how to design and analyse the system over different parameters.
Learn about the representation of system and signal through probabilisticmeaning.
Testing of communication system for different schemes.
Dr. ir. Muhammad Nasir (UOL) Modern Communication Theory October 9, 2015 3 / 18
8
Information
Course Demonstrator: Dr. ir. Muhammad NasirOffice: —Email: [email protected]
Pre-Requisites: Signals and Systems, Probability theory and Linear algebra
Course Material:
Digital Communications (J.G. Proakis)
Principles of Digital Communication (R. G. Gallager)
Error Correcting Codes (S. Johnson)
Dr. ir. Muhammad Nasir (UOL) Modern Communication Theory October 9, 2015 4 / 18
9
Grading
Assignments + Quizzes = 20%
mid-term exam = 25%
Class presentation + Review Paper = 25%
Final = 30%
Dr. ir. Muhammad Nasir (UOL) Modern Communication Theory October 9, 2015 5 / 18
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Time Table
We follow the following time table for classes.
Schedule
Time Day Room05.30 – 08.30 Friday –
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Dr. ir. Muhammad Nasir (UOL) Modern Communication Theory October 9, 2015 6 / 18
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Course Contents
Wireless CommunicationIntroduction, Radio environment for WLAN applications, Review of freespace radio propagation, Link budget analysis, Coverage area, outageprobability, Review of basics modultaion properties and techniques, Di-rect sequence spread spectrum, FHSS, OFDM, Diversity and Rake re-ceiver.
Communication TheoryIntroduction, Random processes, Source coding techniques, Huffmancodes, Digital modulation methods, Optimum receivers for AWGN chan-nels, Maximum likelihood and MAP detectors, BER performance, Infor-mation Theory, Mutual information and channel capacity.
Channel CodingIntroduction, Mathematical basics, Block codes, Iterative decoding, LDPCcodes.
Dr. ir. Muhammad Nasir (UOL) Modern Communication Theory October 9, 2015 7 / 18
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Goal and Approach of Course
Introduction to the field of wireless communication and channel coding
Convey major issues and show solutions
Not an exhaustive or encyclopaedic treatment of the field of basic theory
Specialized follow-on courses to cover the field
Dr. ir. Muhammad Nasir (UOL) Modern Communication Theory October 9, 2015 8 / 18
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Why Wireless
No wires needed
“Last mile” to “last meter’ access to infrastructure
Mobility
No infrastructure present: Ad-Hoc networks
Mobility Aspects
Users can comm “anytime’ anywhere with “anyone”
Device can be connected from anywhere to the network
Complete network can move
Dr. ir. Muhammad Nasir (UOL) Modern Communication Theory October 9, 2015 9 / 18
14
Why Wireless
No wires needed
“Last mile” to “last meter’ access to infrastructure
Mobility
No infrastructure present: Ad-Hoc networks
Mobility Aspects
Users can comm “anytime’ anywhere with “anyone”
Device can be connected from anywhere to the network
Complete network can move
Dr. ir. Muhammad Nasir (UOL) Modern Communication Theory October 9, 2015 9 / 18
15
Why Wireless
No wires needed
“Last mile” to “last meter’ access to infrastructure
Mobility
No infrastructure present: Ad-Hoc networks
Mobility Aspects
Users can comm “anytime’ anywhere with “anyone”
Device can be connected from anywhere to the network
Complete network can move
Dr. ir. Muhammad Nasir (UOL) Modern Communication Theory October 9, 2015 9 / 18
16
Why Wireless
No wires needed
“Last mile” to “last meter’ access to infrastructure
Mobility
No infrastructure present: Ad-Hoc networks
Mobility Aspects
Users can comm “anytime’ anywhere with “anyone”
Device can be connected from anywhere to the network
Complete network can move
Dr. ir. Muhammad Nasir (UOL) Modern Communication Theory October 9, 2015 9 / 18
17
Why Wireless
No wires needed
“Last mile” to “last meter’ access to infrastructure
Mobility
No infrastructure present: Ad-Hoc networks
Mobility Aspects
Users can comm “anytime’ anywhere with “anyone”
Device can be connected from anywhere to the network
Complete network can move
Dr. ir. Muhammad Nasir (UOL) Modern Communication Theory October 9, 2015 9 / 18
18
Why Wireless
No wires needed
“Last mile” to “last meter’ access to infrastructure
Mobility
No infrastructure present: Ad-Hoc networks
Mobility Aspects
Users can comm “anytime’ anywhere with “anyone”
Device can be connected from anywhere to the network
Complete network can move
Dr. ir. Muhammad Nasir (UOL) Modern Communication Theory October 9, 2015 9 / 18
19
Why Wireless
No wires needed
“Last mile” to “last meter’ access to infrastructure
Mobility
No infrastructure present: Ad-Hoc networks
Mobility Aspects
Users can comm “anytime’ anywhere with “anyone”
Device can be connected from anywhere to the network
Complete network can move
Dr. ir. Muhammad Nasir (UOL) Modern Communication Theory October 9, 2015 9 / 18
20
Why Wireless
No wires needed
“Last mile” to “last meter’ access to infrastructure
Mobility
No infrastructure present: Ad-Hoc networks
Mobility Aspects
Users can comm “anytime’ anywhere with “anyone”
Device can be connected from anywhere to the network
Complete network can move
Dr. ir. Muhammad Nasir (UOL) Modern Communication Theory October 9, 2015 9 / 18
21
Wireless in the future networked world
Dr. ir. Muhammad Nasir (UOL) Modern Communication Theory October 9, 2015 10 / 18
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Applications-I
Vehicles
Transmission of news, road conditions, weather, musicPersonal communications using GPS, GPRS, UMTS, WiMaxPosition via GPSLocal ad-hoc network with vehicle close-by to prevent accidentInter-vehicle communication (to avoid collision)In vehicle communication (WLAN, IEEE 802.15)
Emergencies
Early transmission of patient data to hospital (current status, firstdiagnosis)Replacement of fixed infrastructure in case of earthquakes,hurricanes, fire etc.
Dr. ir. Muhammad Nasir (UOL) Modern Communication Theory October 9, 2015 11 / 18
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Typical Applications; Road Traffic
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Mobile and wireless services-always best connected
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Applications-II
Travelling Salesman
Direct access to customer files stored in a central locationConsistent databases for all agentsMobile office
Sensor Network
Weather, earth activities, temperature, pollution etc.
Entertainment, Education
Outdoor internet access,
Ad-Hoc networksIntelligent travel guide with op-to-date info.
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Mobile Devices
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Effect of Device Portability
Power Consumption
Limited computing power, Low quality displays, smaller disks due tolimited battery capacity
Loss of data
Higher probability, has to be included in advance into the design(defect, theft)
Limited user interfaces
Compromise between size of fingers and portability integration ofcharacter/voice recognition, abstract symbols
Limited memory
Dr. ir. Muhammad Nasir (UOL) Modern Communication Theory October 9, 2015 16 / 18
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Area of Research in Communication
Wireless Communication
Transmission quality (bandwidth, error rate, delay)Modulation, Coding, InterferenceMedia access, regulations
Mobility
Location dependent servicesLocation transparencyQuality of service support (delay, jitter, security)
Portability
Power consumptionLimited computing power, size of display, usability
Wireless Sensor Network
Dr. ir. Muhammad Nasir (UOL) Modern Communication Theory October 9, 2015 17 / 18
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Hybrid FSO/RF Communication System
Dr. ir. Muhammad Nasir (UOL) Modern Communication Theory October 9, 2015 18 / 18