Investigation of a modulation method and signal processing techniques for digital data transmission in HF channels.

Author

Michael Ray Campbell

Abstract

"This thesis presents a method of improving the performance of digital communication systems operating in environments typical of the high-frequency (HF) band. The HF channel is a compound error event channel in that it contains random errors due to additive white Gaussian noise (AWGN) plus burst-type errors due to effects such as impulse noise and tone interference. A method of signal design using the time-frequency plane is utilized. This facilitates design of signal sets that may be blanked in time and frequency, thus reducing the effects of the nonGaussian interference. Several signal designs are presented and compared in t􀁗rms of peak-to-RMS ratios, flat noiselike spectrum, and good correlation properties. Also introduced are mathematical analysis techniques that may be used to compare signal designs.

Performance comparisons of the blanking algorithms are obtained using a computer simulation with appropriate models of the channel and receiver. Following the blanking in the receiver a correlation detector is used. The receiver processing (blanking and correlation) is done in the frequency domain through the use of the FFT (Fast Fourier Transform) algorithm. The effects of various design parameters on receiver performance are also shown in the results"-- Abstract, p. ii

Advisor(s)

Ziemer, Rodger E.

Committee Member(s)

Carlson, Gordon E.
Trimble, S. Y.

Department(s)

Electrical and Computer Engineering

Degree Name

M.S. in Electrical Engineering

Publisher

University of Missouri--Rolla

Publication Date

1975

Pagination

x, 127 pages

Note about bibliography

Includes bibliographical references (pages 94-97)

Rights

© 1975 Michael Ray Campbell, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Thesis Number

T 4078

Print OCLC #

5984949

Recommended Citation

Campbell, Michael Ray, "Investigation of a modulation method and signal processing techniques for digital data transmission in HF channels." (1975). Masters Theses. 3007.
https://scholarsmine.mst.edu/masters_theses/3007