ENB 7060 Telecommunications B

Dr. Mohab A. Mangoud Associate Professor of Wireless Communications

University of Bahrain, College of Engineering, Department of Electrical and Electronics Engineering,

P.O. Box 32038, Isa Town,Kingdom of Bahrain Office: +973 17876033/6261 Mobile +973 36728218 Fax: + 973 17680924 Email : mangoud@eng.uob.bh

URL: http://userspages.uob.edu.bh/mangoud

Week 1

Introduction to Digital Communication Systems

Week 1

Introduction to Digital

Communication Systems

Modern Telecommunications Systems

VoIP (VoLTE) and high

definition videos streaming

Wireless Cloud Computing

Telemedicine Virtual Clinics smart grid technologies

The Evolution Of mobile phone networks enables new applications

Google unveils 'Project Glass' virtual-reality glasses.. Wireless AR

Course information

Practical information

– Grading

– Course material

– Schedule

Scope of the course ENB7060 Telecom B

By: Dr.Mohab Mangoud

Instructor Information

Office location: 14-224

Office hours: after 1:30pm (M-W)

Email: mangoud@eng.uob.bh

website:

http://userspages.uob.edu.bh/mangoud

My Research interests:

Wireless communications, Spread-spectrum, smart antennas, Space-time coding and MIMO systems, Antenna Design, Optimization techniques for Electromagnetics.

By: Dr.Mohab Mangoud

Textbook and Course webpage and Software

Require textbooks:

1) Simon Haykin, Communication Systems, 4th edition, John Wiley and Sons, Inc.

2) Digital Communication Systems using MATLAB® and Simulink®

http://astro.temple.edu/~silage/digitalcommMS.htm

• Course Homepage:

http://userspages.uob.edu.bh/mangoud/ENB7060.html

Material accessible from : News, Lecture slides (pdf), Laboratory syllabus (Lab), Set of exercises and assignments.

Require Software: MATLAB: http://www.mathworks.com/ with communications and DSP toolboxes. Both m files programming and simulink models will be used for the simulation of digital communication systems.

By: Dr.Mohab Mangoud

Lab , Project, and Exam

Lab (software+Matlab assignments) 60%

Project 20%

Final exam 20%

By: Dr.Mohab Mangoud

ENB7060

The course is aiming at introducing fundamental issues in designing a (digital) communication system

1. Baseband Pulse modulation

2. Passband Digital Transmission and Digital Modulation techniques

3. Spread-Spectrum and multicarrier and multichannel Modulation

4. Error correcting codes

5. Examples of modern telecommunication systems

By: Dr.Mohab Mangoud

Motivations

Understand the core concept of modern telecom systems

– Satellite Communications,

– Mobile Communications,

– Wireless Communications,

– Computer networks,

– Optical Communications.

– Smart Grids

– Telecommunication: Internet boom at the end of last decade

– Wireless Communication: next boom?

WIMAX-4G (Smart mobile phone)-

VANET (mobile Ad-hoc networks)

By: Dr.Mohab Mangoud

Internet Broadband access

Wire line solutions

1 Multilink dial-up

2 Integrated Services Digital Network (ISDN)

3 Leased lines

4 Cable Internet access

5 Digital subscriber line (DSL, ADSL, SDSL, and VDSL)

6 DSL Rings

7 Fiber to the home

8 Power-line Internet

9 ATM and Frame Relay

Wireless broadband access

1 Mobile broadband

2. Wi-Fi

3 WiMAX

4 Wireless ISP

5 Satellite broadband

6 Local Multipoint Distribution Service

Wire lines data rates

Generation Frequency Definition throughput Technology

1G

(1981-1996)

800-900 MHz

(BW = 30 kHz)

Analog (FM) Voice 14.4 Kbps (peak) AMPS, NMT, TACS

ETACS

2G

(1996-2000)

900/1800 MHz

850/1900 MHz

(BW = 200KH)

Digital

Narrowband

Circuit Switching Data

Voice

Messaging (SMS)

9.6 / 14 Kbps GSM/DCS - 1900

TDMA(IS-136)

CDMA (IS95- CDMA-

one)

2.5G, 2.75G Packet Switching Data

WAP +MMS 56 kbit/s up to 115 kbit/s GPRS, EDGE

3G

(2001-2010)

(wideband-

Global)

2GHz +

1920 -

2170MHz

(BW=5MHz)

Digital

Broadband

Packet Switching Data

(High speed data

Multimedia)

3.1 Mbps (Peak)

500-700 Kbps

CDMA2000

(Verizon, Sprint)

UMTS, WCDMA

(AT&T, T-Mobile+

Europe )

3.5G

3.75G

>2 Mbps 14.4 Mbps (peak)

1-3 Mbps

42 Mbps (peak)& 28 Mbps

2x2 MIMO 672 Mbps

HSPA: HSDPA, HSUPA

HSPA+

4G

(2012+)

(Broadband)

5G=Gigabit

LTE (3GPP)

LTE-A

(3GPP2)

Digital

Broadband

All IP (voice+data)

Very High

Throughput

100-300 Mbps (peak)

100 -1000 Mbps (peak)

3-5 Mbps

LTE (WCDMA)

Mobile WIMAX,

IEEE802.16 (d,e,m)

UBM (IP networks)

3.9

Spectral Allocation in US controlled by FCC (commercial) or OSM (defense)

In Europe, ETSI

FCC auctions spectral blocks for set applications.

Some spectrum set aside for universal use

Worldwide spectrum controlled by ITU-R (International Telecommunication

Union Radio communication Sector)

Spectrum Regulations

ELFEH

F

SH

FUHF

VH

FHFMFLFVLF

Voice

Frequency

30

Hz

30

GHz

3

GHz

300

MHz

30

MHz

3

MHz

300

kHz

30

kHz

3

kHz

300

Hz

300

GHz

2.4

GHz

TV

UHFGSM ISM

960

MHz

890

MHz

812

MHz

470

MHz

Note: The Industrial, Scientific and Medical (ISM) radio bands were

originally reserved internationally for non-commercial use of RF

electromagnetic fields for industrial, scientific and medical purposes.

Bluetooth and IEEE 802.11b : 2.45 GHz band (wavelength =12.2 cm)

–Standard for 5.2 GHz NII band (300 MHz)

–Unlicensed National Information Infrastructure (U-NII) band , USA

Spectrum Allocation

Very Crowded RF spectrum

Part II

Analog or Digital

Common Misunderstanding: Any transmitted signals are ANALOG. NO DIGITAL SIGNAL CAN BE TRANSMITTED

Analog Message: continuous in amplitude and over time

– AM, FM for voice sound

– Traditional TV for analog video

– First generation cellular phone (analog mode)

– Record player

Digital message: 0 or 1, or discrete value

– VCD, DVD

– 2G/3G cellular phone

– Data on your disk

– Your grade

Digital age: why digital communication will prevail

Digital versus analog

Advantages of digital communications:

– Regenerator receiver

– Different kinds of digital signal are treated identically.

Data

Voice

Media

Propagation distance

Original

pulse

Regenerated

pulse

A bit is a bit!

Why digital communications?

Any noise introduces distortion to an analog signal. Since a digital receiver need only distinguish between two waveforms it is possible to exactly recover digital information.

Many signal processing techniques are available to improve system performance: source coding, channel (error-correction) coding, equalization, encryption

Digital ICs are inexpensive to manufacture. A single chip can be mass produced at low cost, no mater how complex

Digital communications allows integration of voice, video, and data on a single system (ISDN)

Digital communications systems provide a better tradeoff of bandwidth efficiency and energy efficiency than analog