1. Synchronization in Digital Communication By: Bader Al-Kandari and Josh Mason Advisors: Dr. Thomas L. Stewart, Dr. In Soo Ahn

2. The purpose of this project is the development of a Quadrature Amplitude Modulation (QAM) signal communication system. MATLAB/Simulink simulation environment, Code Composer Studio Software (CCS) and two TI DSP boards are used to develop and to implement the design.

3. Project Proposal Contents  QAM Overview  Functional Description  Transmitter/Receiver Block Diagrams  Equipment/Standards/Patents  Preliminary Results  Schedule of Remaining Work  Questions?

4. QAM Overview  Quadrature Amplitude Modulation  Sine (Quadrature) and Cosine (In- Phase) Carriers  2-D plane with In-phase and Quadrature Axis

5. QAM Overview  4-QAM Data Constellation

6. QAM Overview  Higher order QAM - 16-QAM

7. Functional Description

8.  Inputs TransmitterTransmitter  Signals from a function generator  Stored Data ReceiverReceiver  QAM signal  Stored Data

9. Functional Description  Outputs TransmitterTransmitter  QAM signal ReceiverReceiver  Recovered Data  Matlab/Simulink Data Acquisition

10. Functional Description  Modes of Operation Transmitter – Real Time Modulation Receiver – Real Time Demodulation

11. Transmitter Block Diagram

12.  Filters lower bandwidth requirements  Digital Carriers – Sampling effect  Adaptable for stored data inputs

13. Receiver Block Diagram

14.  Phase Distortion ChannelChannel  90 degree distortion = data error every time Digital Carrier – Sampling effectsDigital Carrier – Sampling effects  Independent of channel distortion 0.5 * X *[ cos(Wc – Wl)*t + cos(Wc + Wl)*t] + 0.5 * Y *[ sin(Wc – Wl)*t + sin(Wc + Wl)*t]

15. Equipment  Spectrum Digital TMS320C6713 DSK  Agilent 33220A Function Generator  Tektronix TDS 3012B 100MHz Oscilloscope

16. Software  Matlab/Simulink Data GenerationData Generation SimulationSimulation System DesignSystem Design  Code Composer Studio DSP Code CreationDSP Code Creation DSP InterfacingDSP Interfacing

17. TMS320C6713 DSK  TI c6713 DSP 225 MHz225 MHz  USB interface  AIC23 Audio Codec package 8 KHz, 32 KHz, 44.1 KHz, 48 KHz, and 96 KHz8 KHz, 32 KHz, 44.1 KHz, 48 KHz, and 96 KHz four 3.5 mm stereo audio jacksfour 3.5 mm stereo audio jacks

18. Patents/Standards  Many patents Analog, DSP, FPGAAnalog, DSP, FPGA  No Specific Standards ANSI/SCTE 07 2000ANSI/SCTE 07 2000  64-QAM, 256-QAM Digital Cable IEEE 802.11bIEEE 802.11b  PSK Wireless Networking

19. Preliminary Results  QAM Simulink Development 4-QAM Transmit/Receive4-QAM Transmit/Receive  DSP interfacing/testing Digital filteringDigital filtering  Analog source  Data Source

20. 4-QAM Simulink Testing  Simple Transmitter

21. 4-QAM Simulink Testing

25. DSP Filter Test  FIR Filter Fpass 8 KHzFpass 8 KHz Fstop 16 KHzFstop 16 KHz  8 KHz Square Wave Input  44.1 KHz Sampling Rate

26. DSP Filter Test

28. Schedule of Remaining Work PracticalTheoretical 12/1/2005Proposal PresentationProposal Presentation Winter BreakWork on WebsiteWork on Phase distortion 1/24/2006Fully Develop DSP I/O correction 1/31/2006w/ Matlab/Simulink 1/31/2006w/ Matlab/Simulink 2/7/2006Begin Documentation 2/7/2006Begin Documentation 2/14/2006Test/gather data ofFinalize 4-QAM 2/21/2006implemented 4-QAM 2/21/2006implemented 4-QAM 2/28/2006Documentation/TutorialFinish up any remaining 3/7/2006Workphase distortion problems 3/21/20068-QAM testing/data 3/21/20068-QAM testing/data 3/28/2006gatheringBegin work on 8-QAM 4/4/2006Documentation/Tutorialand 16-QAM 4/11/200616-QAM testing 4/11/200616-QAM testing 4/18/2006DocumentationDocumentation 4/25/2006PresentationPresentation 5/2/2006

29. Questions?