A Comparative Study of Quadrature Amplitude Modulation and Continuous Phase Modulation

Master's Thesis


Two modulation techniques are studied in this thesis, quadrature amplitude modulation (QAM) and continuous phase modulation (CPM). These modulation schemes in the presence of amplifier nonlinearity and hostile transmission environments are analyzed as a complete system using simulation to determine relative performance. A fair comparison of these two modulation techniques is carried out, demonstrating the tradeoffs between spectral efficiency and power efficiency of these two techniques.

This thesis also presents an idea of nonuniform QAM constellations, which can potentially improve bit-error-rate performance in the presence of phase noise. An optimal nonuniform QAM constellation is designed to be adaptive to the actual probability distribution of the received symbols. Both analytical results and simulation results show that nonuniform constellations are superior to uniform constellations in the presence of phase noise.


Attribute NameValues
  • etd-12102006-195114

Author Chi Z+D760hang
Advisor Yih-Fang Huang
Contributor Thomas Fuja, Committee Member
Contributor Yih-Fang Huang, Committee Co-Chair
Degree Level Master's Thesis
Degree Discipline Electrical Engineering
Degree Name MSEE
Defense Date
  • 2006-08-08

Submission Date 2006-12-10
  • United States of America

  • CPM

  • simulation

  • modulation

  • QAM

  • University of Notre Dame

  • English

Record Visibility and Access Public
Content License
  • All rights reserved

Departments and Units


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