High-Level Wireless Digital Communications for Program and Engineering Managers Course Sampler

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This two-day course is designed to provide an overall view of wireless communications including commercial and military applications for Program Managers, Engineering Managers, and others that do not have a technical engineering background and who are looking to understand Wireless Communications at a high level to be more effecting in dealing with customers, staff, and those working on these programs. It is also an excellent refresher course for those engineers that want to be more involved with Digital Communications in their careers. This is a very informative class at a high level so managers that are involved or going to be involved with Wireless Communications can understand at a high level what the engineers and programs are developing. It includes high level descriptions, enough detail to understand the concepts with little math or analysis involved. This is focus towards spread spectrum systems, which is nearly all of communications today. It covers a wide range of data link communication techniques, including tradeoffs of cost reduction and size reduction methods using a budget to determine what is needed for the wireless system. Thus the student gains a firm understanding of the processes needed to effectively understand wireless data link communication systems which is vital to their jobs. You will gain an intuitive understanding from all of the experiences of the Instructor who has been working with communications for over 25 years.
This seminar has been taught to a number of Program Managers and other Managers at other companies with excellent feedback by those who took the class.
Students will receive a copy of the instructor's textbook, Transceiver and Systems Design for Digital Communications, 3rd Edition.

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High-Level Wireless Digital Communications for Program and Engineering Managers Course Sampler

  1. 1. High-Level Wireless Digital Communicationsfor Program and Engineering Managers Instructor: Scott R. Bullock
  2. 2. www.ATIcourses.comBoost Your Skills 349 Berkshire Drive Riva, Maryland 21140with On-Site Courses Telephone 1-888-501-2100 / (410) 965-8805Tailored to Your Needs Fax (410) 956-5785 Email: ATI@ATIcourses.comThe Applied Technology Institute specializes in training programs for technical professionals. Our courses keep youcurrent in the state-of-the-art technology that is essential to keep your company on the cutting edge in today’s highlycompetitive marketplace. Since 1984, ATI has earned the trust of training departments nationwide, and has presentedon-site training at the major Navy, Air Force and NASA centers, and for a large number of contractors. Our trainingincreases effectiveness and productivity. Learn from the proven best.For a Free On-Site Quote Visit Us At: http://www.ATIcourses.com/free_onsite_quote.aspFor Our Current Public Course Schedule Go To: http://www.ATIcourses.com/schedule.htm
  3. 3. Link Budget • Link - Connects the Transmitter to the Receiver • Budget - Allocation of Power and Noise through the Link • Tracks Signal & Noise Levels from Tx PA to Rx Detector (LNA) – Power Output (PA), Tx Losses, Channel Losses, Rx Losses – Signal/Noise at Receiver’s Detector – Required S/N (or Eb/No for BER) • Used in Solving Tradeoffs – Size, cost, data rate, LPI/LPD, waveform, coding, etc. Rx Antenna Tx Antenna Power & Noise Through the Link Transmitter Receiver 1Bullock Engineering Research Copyright 2010
  4. 4. Digital vs. Analog Comms Digital System Digital 5V 5V PSK, FH, etc. A/D Mod Demod Sampler D/A 5V analog = Digital 101 LO LO Digital 101 = 5V analog Perfect Reconstruction of the Digital Waveform Assuming No Bit Errors Analog System AM/FM etc Mod Demod Analog LO LO Analog + Noise 2Bullock Engineering Research Copyright 2010
  5. 5. Digital Modulation Creates Frequency Waveform (Sinc) Time Domain t V Frequency Domain PdBm f 2/PW Null to Null Bandwidth 2 x Bit/Chip Rate Direct Sequence Digital Modulation Shifts the phase of the carrier frequency according to the data 3Bullock Engineering Research Copyright 2010
  6. 6. Spread Spectrum for Direct Sequence and Frequency Hop – Spread Spectrum uses more bandwidth than is required to send data Signal Signal Spread Spectrum PdBm Frequency Hop PdBm Spread Spectrum High Speed PN-code Narrowband f Narrowband f Signal Signal Wideband Wideband Spread Spectrum Spread SpectrumFaster pseudo-random code spreads the bandwidth Frequency hop spreads the bandwidth Higher the code rate, wider the bandwidth More frequencies, wider the bandwidth 4Bullock Engineering Research Copyright 2010
  7. 7. Multiple User Techniques System 1 System 2 System 3 Time Division Multiple Access (TDMA) V Users divided up in time slots. 1 2 3 1 2 3 time a. Time division multiple access . Code 1 System 1 Code Division Multiple Access (CDMA) Code 2 System 2 Users have different codes Code 3 System 3 b. Code division multiple access. f1 f2 f3 PdBm Frequency Division Multiple Access (FDMA) Users operate on different frequencies Frequency System 1 System 2 System 3 c. Frequency division multiple access. 5Bullock Engineering Research Copyright 2010
  8. 8. Power Control for Near/Far Problems Required in CDMA and other multiplexing schemes Reduce the effects of Near/Far problems Goal is to have equal power from users Used where process gain is inadequate for good separation of users 6Bullock Engineering Research Copyright 2010
  9. 9. Improvements To Eliminate Errors in QPSK –Increase Symbol S/N –Bit rate same –Provides twice the data rate –Decrease BW –Same BW –Decrease Noise –No Errors –No Errors 7Bullock Engineering Research Copyright 2010
  10. 10. Antenna Diversity Example Two or more antennas Automatic selection of best signal Theory:when one antenna is in a multipath null, the other is not Works very well with only two antennas Antennas separated a short distance to prevent both antennas from being in the null Lab example with 2.4 GHz wireless modem connection - Separation approximately 5” 8Bullock Engineering Research Copyright 2010
  11. 11. Adaptive Filter with Two Interfering Signals 9Bullock Engineering Research Copyright 2010
  12. 12. Differential GPS Differential Corrections between surveyed point vs GPS Offset from Surveyed point N Surveyed Point E W S Uses corrections for Accurate positioning 10Bullock Engineering Research Copyright 2010
  13. 13. GPS Landing Systems D8PSK LPI/Anti-jam Data Link Sends GPS Corrections 11 Relative GPS for moving platforms (Aircraft Carriers)Bullock Engineering Research Kinematic Carrier Phase Tracking KCPT for CATIII landing systems Copyright 2010
  14. 14. Satellite Two-Way Communications Coherent Quadrature Phase Shift Keying (QPSK) 12Bullock Engineering Research Copyright 2010
  15. 15. MIMO, MISO, SIMO Monitor & Control MIMO Transmitter Increased Data Rate Receiver or Robustness MISO – Transmitter Antenna Diversity Transmitter Multipath, Noise, Jammer Mitigation Receiver SIMO – Receiver Antenna Diversity Transmitter Multipath, Noise, Jammer Mitigation Receiver 13Bullock Engineering Research Copyright 2010
  16. 16. Beam Positioning of AESAs to Mitigate Multipath Reflection/Multipath AESA Position Difference Amp Null Position Mitigates Multipath Distance 14Bullock Engineering Research Copyright 2010
  17. 17. To learn more please attend this ATI course Please post your comments and questions to our blog: http://www.aticourses.com/blog/ Sign-up for ATIs monthly Course Schedule Updates :http://www.aticourses.com/email_signup_page.html

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