1. Copyright 2011 Saeed M. Khan as to this presentation. 1 Introduction to a Wireless Communication System Dr. Saeed M. Khan

2. Copyright 2011 Saeed M. Khan as to this presentation. 2 Discussion Points Motivation A Basic Communication System A Wireless Communication System Cellular/Personal Communication Service (PCS) Summary

3. Motivation Personal Interest in an exciting growth industry (cellular/PCS) Careers in this industry are for many disciplines however electronics majors occupies a special place--- Printed circuit board (PCB) design Programming hardware (microprocessors, programmable devices, memory) Radio frequency electronics Copyright 2011 Saeed M. Khan as to this presentation. 3

4. Motivation(Growth and Investment 2011) Results of the survey also showed 70% of the companies, technology and non-technology businesses included, are currently leveraging or are planning to leverage mobile applications for their business, and many companies are planning major internal investments in new technologies including new laptops, mobile devices, mobile applications, and custom software. SOURCE: http://www.iltechpartner.org/tech-job-growth-anticipated- 2011 Copyright 2011 Saeed M. Khan as to this presentation. 4

5. Motivation (some speculation about the future): Continued convergence of technologies and applications Explosive innovation that take advantage of 3G and 4G technologies SOME CURRENT DAY APPLICATIONS WITH 3G CONTACTS, TASKS, CALENDER CALCULATORS, CAMERAS EMAIL INTERNET Play games TEXT TV GPS MP3 Copyright 2011 Saeed M. Khan as to this presentation. 5

6. 6 A Basic Communication System SourceTransmitterReceiverDestination Channel Source of information e.g. voice, video, data, etc. Generally takes information converts to a signal that can be transmitted through the channel. Wired, wireless, Fiber Optic Converts electrical signal back to information. Receiver of information e.g. voice, video, data, etc.

7. Copyright 2011 Saeed M. Khan as to this presentation. 7 A Wireless Communication System SourceTransmitterReceiverDestination Channel Transmits information through antennas after modulation (e.g. AM, FM, CDMA, etc.) Wireless (air, free-space) Receives signal and demodulates into information

8. Copyright 2011 Saeed M. Khan as to this presentation. 8 Cellular/PCS Network Radio Tower Transmit/Receive traffic in the same cell Connect to Mobile Telephone Switching Network (MTSO) MTSO Connects to the PSTN (Public Telephone Switching Network) PSTN Connects to the WORLD FIGURE TAKEN FROM SITE BELOW http://freenet.msp.mn.us/people/brose/papers/pcs.html#_Toc38 9511468

9. Summary and Concluding Remarks PCS systems are a growth sector of the economy Lots of room for innovation Electronic engineers play a key role in this industry Please remember to take the associated assignment (you can look up information in the accompanying power point file) Thursday we look at a critical technology in cellular/PCS communication Copyright 2011 Saeed M. Khan as to this presentation. 9