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EEC265 – Principles Of Digital Communications

4 units – Fall Quarter

Lecture: 4 hours

Prerequisite: EEC 165, EEC 260, or consent of instructor

Grading: Letter, homework (50%) and quizzes (50%).

Catalog Description:

Introduction to digital communications. Coding for analog sources. Characterization of signals and systems. Modulation and demodulation for the additive Gaussian channel. Digital signaling over bandwidth constrained linear filter channels and over fading multipath channels. Spread spectrum signals.

Expanded Course Description:

  1. Coding for Analog Sources
    1. Pulse amplitude modulation
    2. Differential pulse amplitude modulation
    3. Delta modulation
    4. Linear predictive coding
    5. Vector quantization
  2. Characterization of Signals and Systems
    1. Bandpass signals and systems
    2. Orthogonal expansions for finite energy signals
    3. Linear, memoryless modulation methods (PAM, PSK, QAM)
    4. Nonlinear modulation methods with memory (CPM, CPFSK, MSK, GMSK)
    5. Baseband signals
    6. Spectral characteristics
  3. Modulation and Demodulation for the Additive Gaussian Channel
    1. Characterization of signal waveforms
    2. Optimum demodulation for completely known signals and probabilities of error
    3. Optimum demodulation for signals with random phase and probabilities of error
    4. Carrier and symbol synchronization
  4. Digital Signaling over Bandwidth Constrained Linear Filter Channels
    1. Characterization of band-limited channels
    2. Signal design for band-limited channels and partial response signals
    3. Optimum demodulation for intersymbol interference and additive Gaussian noise
    4. Linear equalization
    5. Decision-feedback equalization
    6. Maximum-likelihood sequence estimation and the Viterbi algorithm
    7. Recursive least-squares algorithms for adaptive equalization and the Kalman algorithm
    8. Echo cancellation
  5. Digital Signaling over Fading Multipath Channels (optional)
    1. Characterization of fading multipath channels
    2. Diversity techniques
  6. Spread Spectrum Signals for Digital Communications (optional)
    1. Direct sequence spread spectrum signals
    2. Frequency-hopped spread spectrum signals


  1. Digital Communications, J. G. Proakis, McGraw-Hill, 1995

Instructors: Abdel-Ghaffar, Gardner, Levy


Last revised: September 1995