Accession Number:

ADA064363

Title:

Analysis of Modern Digital Modulation Techniques.

Descriptive Note:

Master's thesis,

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s):

Report Date:

1978-12-15

Pagination or Media Count:

100.0

Abstract:

Offset Quadriphase Shift Keyed OQPSK modulation, Minimum Shift Keyed MSK modulation and Sinusoidal Frequency Shift Keyed SFSK modulation are analyzed and compared within this report. First, OQPSK, MSK and SFSK are examined both graphically and mathematically, and compared to the fundamental modulation techniques of FSK, PSK and QPSK. Second, a common mathematical framework unifying the three modulation techniques is developed. Third, the theoretical spectral properties of each are calculated. The spectral properties include the autocorrelation function, power spectral density, spectral occupancy, spectral shape and roll off characteristics. Next, the practical spectral properties of the three modulation techniques are developed using a realistic bandlimited, nonlinear channel. Finally, simulated and measured performance of OQPSK and MSK are given and compared using probability of error as the figure of merit. Author

Subject Categories:

  • Cybernetics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE