ECE 54400 - Digital Communications

Course Details

Lecture Hours: 3 Credits: 3

Counts as:

  • EE Elective
  • CMPE Selective - Special Content

Normally Offered:

Each Fall


On-campus and online


ECE 44000

Requisites by Topic:

Analysis and design of analog and digital communication systems

Catalog Description:

Introduction to digital communication systems and spread spectrum communications. Topics include analog message digitization, signal space representation of digital signals, binary and M-ary signaling methods, detection of binary and M-ary signals, comparison of digital communication systems in terms of signal energy and signal bandwidth requirements. The principal types of spread spectrum systems are analyzed and compared. Application of spread spectrum to multiple access systems and to secure communication systems is discussed.

Required Text(s):

  1. Introduction to Digital Communications , Michael B. Pursley , Prentice Hall , 2005 , ISBN No. 0-201-18493-1

Recommended Text(s):

  1. Digital Communications , 5th Edition , Proakis, J. G.; Salehi, M. , McGraw-Hill Publishing Company, , 2007 , ISBN No. 0-07-295716-6

Lecture Outline:

Lectures Topic
6 1. Fundamentals A. Channel Models (1) B. Narrowband Gaussian Noise Repr. (1) C. Matched Filters and Correlators (2) D. Message Digitization
7 2. Detection of Binary Signals A. Baseband Signal Detection (1) B. Detection of Nonwhite Noise (1) C. Effects of Timing Errors (1) D. Intersymbol Interference (1) E. Phase-Shift Keying (PSK) (1) F. Differential PSK (1) G. Frequency-Shift Keying (FSK) (1)
3 3. M-ary Signal Detection A. Signal Space Representation (2) B. Coherent Detection of M-ary Signals (1) C. Union Bound for Orthogonal Signals (1) D. Detection of Nonorthogonal Signals (3) E. Biorthogonal F. Simplex G. Polyphase H. Quadiphase (QPSK) I. Offset QPSK J. Differential QPSK K. Noncoherent Detection of M-ary Signals (1) L. Amplitude Shift Keying (ASK) M. Amplitude and Phase Shift Keying (APSK)
3 4. Comparison of Digital Communication Systems A. Theoretical Limits of Performance (1) B. Bandwidth Expansion Factory (1) C. Energy and Bandwidth Comparison (1)
4 5. Fundamentals of Spread Spectrum A. General Concepts (1) B. Direct Sequence Spread Spectrum (1) C. Frequency Hopping Spread Spectrum (1) D. Hybrid Spreading Methods (1)
5 6. Analysis of Direct Sequence Systems A. Properties of PN Sequences (1) B. Partial Correlation (1) C. Direct Sequence Performance (1) D. Interference Rejection and Antijam (1) E. Interception (1)
3 7. Analysis of Frequency Hop Systems A. Frequency Hopping Patterns (1) B. Frequency Hopping Performance (1) C. Interference Rejection and Antijam (1)
3 8. Applications of Spread Spectrum A. Multiple Access (1) B. Jam Resistance (1) C. Low Probability of Intercept (1)

Assessment Method:

Homework and exams. (3/2022)