ECE 4600 Communication Systems Dr. Bradley J. Bazuin Associate Professor Department of Electrical and Computer Engineering College of Engineering and Applied Sciences
Course Topics Course Introduction and Overview Review of selected topics from Fourier transforms, linear systems, convolution and filtering. (ABET a,k) Amplitude Modulation, Signal, Spectrum and Circuits. (ABET a-g,j,k) Phase and Frequency Modulation, Signals, Spectrum, Circuits, Bessel Functions, Phase-locked loops. (ABET a-g,j,k) Noise in analog modulation (ABET a-g,j,k) Digital Communications, Amplitude Shift Keying, Phase Shift Keying, Optimum Receiver, Decision Regions. (ABET a-g,j,k) Noise in digital communications (ABET a-g,j,k) Selected advance topics from Information theory, Channel Coding, or Coded Modulation (ABET a-g,j,k) ECE 4600 2
Course Objectives To give students the ability to analyze analog and digital communication systems performance, and design subsystems and circuits. To provide communications fundamentals required for careers related to communications. To provide communications fundamentals required for more advanced communications training. You are ready for ECE6640 Digital Comm.. ECE 4600 3
Final Exam Monday, 14 December, 10:15 AM Open Book, Open Notes 2009: 8 questions, 80 points 2008: 8 questions, 80 points 2007: 8 questions, 80 points 2006: 9 (1 free-bee) questions, 90 points Comprehensive Study past exams and new material ECE 4600 4
Exam Content Fourier Transforms Transmission Loss, Cascaded Gains and Cascaded Noise Figures Sketching signal waveforms: AM, PM, FM, ASK, PSK, FSK In time, in phase, in frequency Modulation type equations, modulators, demodulators Signal Baseband and Bandpass Bandwidths: AM, PM, FM, ASK, PSK, FSK Filters: LPF and BPF Band edge attenuation, stopband attenuation, transition band Digital Modulation Bit-error-rates, Probability of error, etc. SNR to Eb/No, Q-function BER Optimal Digital Modulation Detection, Filters/Correlators, and Thresholds ECE 4600 5
Exposed to Real world communication system engineering concepts, problems, and design approaches. signals in time and frequency, transmitters and receivers (idealized block diagrams), signal propagation (including path loss, receiver gain and noise figure), receiver operating characteristics (including receiver sensitivity, dynamic range, SNR and Eb/No), signal bandwidths (baseband and RF bandpass), and filters (passband, transition bands, stop band, and simple design). ECE 4600 6
Take-Home Final Due today, 11 December by 5 PM Waveform File is on the web site for problem #1 ECE 4600 7
Spectrum Close Up Sequenctial FFTs of the ModSig Waveform 0-20 Power (db) -40-60 -80-100 -120 0 2 4 6 8 10 ECE 4600 Fs = 11,025 12 10 4 Frequency (Hz) Fis = 264,600 8
Textbook/Materials A. Bruce Carlson, P.B. Crilly, J.C. Rutledge, Communication Systems, 4th ed., McGraw-Hill, 2002. ISBN: 0-07-011127-8 MATLAB, Student Edition MATLAB Signal Processing Toolbox The MATH Works, MATLAB ($99) and Signal Processing Toolbox ($29) http://www.mathworks.com/ LTSpice/SwitcherCAD III Linear Technology http://www.linear.com/company/software.jsp ECE 4600 9
Course/Text Overview Chapter 1: Introduction (1 Lecture) 1.1 Elements and Limitations of Communications Systems 1.2 Modulation and Coding 1.3 Historical Perspective and Societal Impact 1.4 Prospectus Chapter 2: Signals and Spectra (2 Lectures) 2.1 Line Spectra and Fourier Series 2.2 Fourier Transforms and Continuous Spectra (2.1) 2.3 Time and Frequency Relations (2.2) 2.4 Convolution (2.3) 2.5 Impulses and Transforms in the Limit (2.4) ECE 4600 10
Course/Text Overview (2) Chapter 3: Signal Transmission and Filtering (3.5 Lectures) 3.1 Response of LTI Systems (2.4) 3.2 Signal Distortion in Transmission (3.1) 3.3 Transmission Loss and Decibels (3.2) 3.4 Filters and Filtering (3.3) 3.5 Quadrature Filters and Hilbert Transforms (3.4) 3.6 Correlation and Spectral Density (3.3) Chapter 4: Linear CW Modulation (2.5 Lectures) Exam #1 4.1 Bandpass Signals and Systems (3.4) 4.2 Double-Sideband Amplitude Modulation (4.1) 4.3 Modulators and Transmitters (4.2) 4.4 Suppressed-Sideband Amplitude Modulation (3.5, 4.3) 4.5 Frequency Conversion and Demodulation (4.4) ECE 4600 11
Course/Text Overview (3) Chapter 5: Exponential CW Modulation (4 Lectures) 5.1 Phase and Frequency Modulation (4.3) 5.2 Transmission Bandwidth and Distortion (5.1) 5.3 Generation and Detection of FM and PM (4.5, 5.2) 5.4 Interference (5.3) Chapter 6: Sampling and Pulse Modulation (2 Lectures) 6.1 Sampling Theory and Practice (4.2) 6.2 Pulse-Amplitude Modulation (6.1) 6.3 Pulse-Time Modulation (6.2) ECE 4600 12
Course/Text Overview (4) Chapter 7: Analog Communication Systems (4 Lectures) Exam #2 7.1 Receivers for CW Modulation (5.3) 7.2 Multiplexing Systems (5.3, 6.1) 7.3 Phase-Lock Loops (7.1) 7.4 Television Systems (7.1) ECE 4600 13
Course/Text Overview (5) Chapter 8: Probability and Random Variables (1 Lecture) ECE 3800 Review Material 8.1 Probability and Sample Space 8.2 Random Variables and Probability Functions (8.1) 8.3 Statistical Averages (2.3, 8.2) 8.4 Probability Models (8.3) Chapter 9: Random Signals and Noise (1 Lecture) ECE 3800 Review Material Incorporated Previously 9.1 Random Processes (3.6, 8.4) 9.2 Random Signals (9.1) 9.3 Noise (9.2) 9.4 Baseband Signal Transmission with Noise (9.3) 9.5 Baseband Pulse Transmission with Noise (9.4) ECE 4600 14
Course/Text Overview (6) Chapter 10: Noise in Analog Modulation Systems (3 Lectures) 10.1 Bandpass Noise (4.4, 9.2) 10.2 Linear CW Modulation with Noise (10.2) 10.3 Exponential CW Modulation with Noise (5.3, 10.2) 10.4 Comparison of CW Modulation Systems (9.4, 10.3) 10.5 Phase-Lock Loop Noise Performance (7.3, 10.1) 10.6 Analog Pulse Modulation with Noise (6.3, 9.5) Chapter 11: Baseband Digital Transmission (3 Lectures) 11.1 Digital Signals and Systems (9.1) 11.2 Noise and Errors (9.4, 11.1) 11.3 Bandlimited Digital PAM Systems (11.2) 11.4 Synchronization Techniques (11.2) ECE 4600 15
Course/Text Overview (7) Not Covered Chapter 12: Digitization Techniques for Analog Messages and Networks 12.1 Pulse-Code Modulation (6.2, 11.1) 12.2 PCM with Noise (11.2, 12.1) 12.3 Delta Modulation and Predictive Coding (12.2) 12.4 Digital Audio Recording (12.3) 12.5 Digital Multiplexing (12.1) 12.6 Computer Networks (12.5) Chapter 13: Channel Coding and Encryption 13.1 Error Detection and Correction (11.2) 13.2 Linear Block Codes (13.1) 13.3 Convolutional Codes (13.2) 13.4 Data Encryption (13.1) ECE 4600 16
Course/Text Overview (8) Chapter 14: Bandpass Digital Transmission (4 Lectures) 14.1 Digital CW Modulation (4.5, 5.1, 11.1) 14.2 Coherent Binary Systems (11.2, 14.1) 14.3 Noncoherent Binary Systems (14.2) 14.4 Quadrature-Carrier and M-ary Systems (14.2) 14.5 Trellis-Coded Modulation Chapter 15: Spread Spectrum Systems (1 Lectures, as time permits) 15.1 Direct Sequence Spread Spectrum (14.2) 15.2 Frequency Hop Spread Spectrum (15.1) 15.3 Coding (15.1) 15.4 Synchronization (7.3) 15.5 Wireless Telephone Systems (15.1) ECE 4600 17