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Introduction – Chapter 1 CENG 5931 - Wireless Communications Textbook: Wireless Communications and Networks 2 nd Edition by William Stallings CourseSmart Textbook Option Wireless Communications & Networks by William Stallings eText ISBN-10: 0-13-186316-9  

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introduction chapter 1

Introduction – Chapter 1

CENG 5931 - Wireless Communications

Textbook: Wireless Communications and Networks2nd Edition

by William Stallings

coursesmart textbook option
CourseSmart Textbook Option

Wireless Communications & Networks by William Stallings

  • eText ISBN-10: 0-13-186316-9  
  • eText ISBN-13: 978-0-13-186316-3 

CourseSmart is a choice for students looking to save money. As an alternative to purchasing the print textbook, students can subscribe (180 days) to an online version (requires Internet connection) or purchase a download version (no Internet connection required) to the same content online ($64.50) and save as compared to the list price of the print text.

wireless comes of age
Wireless Comes of Age
  • Guglielmo Marconi invented the wireless telegraph in 1896
    • Communication by encoding alphanumeric characters in analog signal – continuous wave (CW)
    • Sent telegraphic signals across the Atlantic Ocean
    • “It is dangerous to put limits on Wireless” - Guglielmo Marconi, 1932
  • Communications satellites launched in 1960s
  • Advances in wireless technology
    • Radio, television, mobile telephone, communication satellites – initially RF based analog systems in the VHF/UHF spectrum
  • More recently
    • Satellite communications, wireless networking, cellular technology – digital RF in the microwave spectrum
broadband wireless technology
Broadband Wireless Technology
  • Higher data rates obtainable with broadband wireless technology
    • Graphics, video, audio
  • Shares same advantages of all wireless services: convenience and reduced cost
    • Service can be deployed faster than fixed service
    • No cost of cable plant
    • Service is mobile, deployed almost anywhere
  • Ubiquitous Computing (Mark Weiser/Xerox Parc) – “ The most profound technologies are those that disappear. They weave themselves into the fabric of everyday life until they are indistinguishable from it.”
limitations and difficulties of wireless
Limitations and Difficulties of Wireless
  • Mobility brings unique challenges of its own
  • Limitations from political and technical difficulties may inhibit wireless technologies (but doubtful today)
  • Lack of an industry-wide standard, which should be a concern to the global community (but the global economy will mandate a solution)
  • Device limitations
    • e.g., small LCD on a mobile telephone
    • e.g., browsers of most mobile wireless devices use wireless markup language (WML) instead of HTML
  • Security – Achilles heel of the technology
  • RF Effects – long term effects on humans? Environment?
why this course
Why This Course?
  • A very hot technology
  • Wireless is convenient and less expensive, low deployment costs, great for countries without a wired infrastructure
  • Already an integral part of business and our lifestyle
  • Eventually everything will be wireless
  • A communications technique that will become fully integrated with our bodies in terms of our clothes and maybe even our brain!
  • Data rates are improving significantly faster than anticipated and in time will no longer be a limitation, especially when wireless data rates reach the processing bandwidth of the human eye
why not this course
Why Not This Course?
  • If it heats up quickly, it will also cool down just as fast (low specific heat)
  • Course time limitations limit development of a fundamental set of ‘knowledge’ tools. Limited hands-on opportunities.
  • Design, test and deployment is computer aided (as is everything today) and is very dynamic with new tools being introduced every day.
  • RF design is somewhat of a black art and not a large career field
  • Government is under pressure to open more spectrum for wireless applications (recent 108 MHz of analog TV channel spectrum, AT&T problems) – all leading to a very dynamic landscape.
  • What are the real job qualifications? Just about every engineering job will touch wireless communications in some manner.
  • Conclusions - Flexibility is the keynote of life. No substitute for experience.
a typical tool wireless communication system design with matlab and simulink
A Typical Tool:Wireless Communication System Design with MATLAB and Simulink
  • MathWorks algorithm development and system-level engineering tools: MATLAB and Simulink
  • Designing and testing the architecture and behavior of wireless devices early in the design process to reduce overall development time, cost, and risk
  • Lyrtech Signal Processing used for their SignalWAVe DSP/FPGA development hardware, a rapid-prototyping system with TI DSP and Xilinx FPGA. With Simulink, Xilinx System Generator for DSP and TI Code Composer Studio, SignalWAVe supports co-simulation, real-time processing, and hardware-in-the-loop
  • Design of wireless standards: 802.11a/b/g/n, WiMAX, Bluetooth
  • Design features include: Baseband DSP and RF equivalents, Behavioral analog/mixed-signal, MAC/Link layer
part one background
Part One: Background
  • Provides preview and context for rest of book
  • Covers basic topics in Chapters 1 thru 4
    • Data Communications
    • TCP/IP
  • Chapter 1 is the Introduction
chapter 2 transmission fundamentals
Chapter 2: Transmission Fundamentals
  • Basic overview of transmission topics
  • Data communications concepts
    • Includes techniques of analog and digital data transmission
  • Channel capacity
  • Transmission media
  • Multiplexing
chapter 3 communication networks
Chapter 3: Communication Networks
  • Comparison of basic communication network technologies
    • Circuit switching
    • Packet switching
    • Frame relay
    • ATM
chapter 4 protocols and the tcp ip protocol suite
Chapter 4: Protocols and the TCP/IP Protocol Suite
  • Protocol architecture
  • Overview of TCP/IP
  • Open systems interconnection (OSI) reference model
  • Internetworking
part two wireless communication technology
Part Two: Wireless Communication Technology
  • True start of the course
  • Underlying technology of wireless transmission
  • Encoding of analog and digital data for wireless transmission
chapter 5 antennas and propagation
Chapter 5: Antennas and Propagation
  • Principles of radio and microwave
    • Antennas: radiation patterns, performance
    • Wireless transmission modes (propagation)
    • The harsh wireless environment: attenuation, fading, noise, absorption, multipath, data errors, interference
    • Compensation mechanisms (how computers can save the day)
chapter 6 signal encoding techniques
Chapter 6: Signal Encoding Techniques
  • Wireless transmission
    • Analog and digital data
    • Analog and digital signals
  • The large number of ways can you modulate a signal in the digital realm to convey information/data
chapter 7 spread spectrum
Chapter 7: Spread Spectrum
  • Advantages/Disadvantages
  • Frequency hopping (FHSS)
  • Direct sequence spread spectrum (DSSS)
  • Code division multiple access (CDMA)
chapter 8 coding and error control
Chapter 8: Coding and Error Control
  • Using redundancy for error detection and correction
  • Forward error correction (FEC)
  • Automatic repeat request (ARQ) techniques
part three wireless networking
Part Three: Wireless Networking
  • Examines major types of networks
    • Satellite-based networks
    • Cellular networks
    • Cordless systems
    • Fixed wireless access schemes
  • Use of mobile IP and Wireless Access Protocol (WAP) to provide Internet and Web access
  • WML – Wireless Markup Language
chapter 9 satellite communications
Chapter 9: Satellite Communications
  • Quick run through of the material
  • Geostationary satellites (GEOS)
  • Medium-earth orbiting satellites (MEOS)
  • Low-earth orbiting satellites (LEOS)
  • Capacity allocation
chapter 10 cellular wireless networks
Chapter 10: Cellular Wireless Networks
  • Cellular wireless network design issues
  • First generation analog (traditional mobile telephony service)
  • Second generation digital cellular networks
    • Time-division multiple access (TDMA)
    • Code-division multiple access (CDMA)
  • 3G and 4G networks (G = generation)
  • How fast can it change? Sales hype? Speed is always the # 1 requirement.
  • In wireless networks, the crux has been that smaller is better (outside of the box thinking)
chapter 11 cordless systems and wireless local loop
Chapter 11: Cordless Systems and Wireless Local Loop
  • Quick run through of Chapter material
  • Cordless systems
  • Wireless local loop (WLL)
    • Sometimes called radio in the loop (RITL) or fixed wireless access (FWA)
chapter 12 mobile ip and wireless access protocol
Chapter 12: Mobile IP and Wireless Access Protocol
  • IP protocol modifications to accommodate wireless access to Internet
  • Wireless Application Protocol (WAP)
    • Provides mobile users access to telephony and information services including Internet and Web
    • Includes wireless phones, pagers and personal digital assistants (PDAs)
part four wireless local area networks
Part Four: Wireless Local Area Networks
  • Chapters 13 through 15
  • Examines underlying wireless LAN technology
  • Examines standardized approaches to local wireless networking
chapter 13 wireless lan technology
Chapter 13: Wireless LAN Technology
  • Overview of LANs and wireless LAN technology and applications
  • Transmission techniques of wireless LANs
    • Spread spectrum
    • Narrowband microwave
    • Infrared
chapter 14 wi fi and the ieee 802 11 wireless lan standard
Chapter 14: Wi-Fi and the IEEE 802.11 Wireless LAN Standard
  • Wireless LAN standards defined by IEEE 802.11 committees
    • 802.11a – office LANs, up to 54 Mbps, 5 GHz
    • 802.11b – home LANs, up to 11 Mbps, 2.4 Ghz still the king because of deployed resources
    • 802.11g – 2.4 GHz, today’s high speed standard
    • 802.11n – 2.4/5 GHz multiple channels
    • Trend is toward equipment that does 802.11 a/b/g/n
    • Wi-Fi Protected Access (WPA, WPA2/AES) – improvement on the 802.11 security issues from WEP (Wired Equivalent Privacy) algorithm (64/128 bits)
chapter 15 bluetooth and 802 15
Chapter 15: Bluetooth and 802.15
  • Bluetooth is an open specification for wireless communication and networking
    • Personal computers
    • Mobile phones
    • Other wireless devices
  • Consortium of companies under writing the cost of development and deployment
  • 802.15.3 – very high data rates for the short range electronic device interconnection
internet and web resources
Internet and Web Resources
  • Web page for this book
    • web sites. Listed by textbook chapter, errata sheet (make sure you select Errata-Wireless2e folder. Also textbook figures, tables, slides, internet mailing list, other wireless course sites.
  • Computer Science Student Support Site
    • Good review topics, queuing theory, CS cheat sheet
  • Newsgroups/Newsletters/Outside Resources
    • Network Computing Mobile Observer
    • Refresher on electromagnetism (physics), the tutorials at
useful web sites from stallings
Useful Web Sites from Stallings

Chapter 1 – Introduction

  • IT World's Wireless: Provides a wide range of information on wireless technology, mostly from a management perspective.
  • Wireless Developer Network: News, tutorials, and discussions on wireless topics
  • Office of Spectrum Managment: responsible for managing the Federal Government's use of the radio frequency spectrum." There are many informative features on this Web site, including documents, links, and a frequency allocation chart.