Doctoral Dissertations

Abstract

The power and bandwidth efficiency of multi-h continuous- phase modulation (CPM) schemes in practical environments are considered. Specific impairments considered are transmitter filtering, amplitude limiting, and receiver symbol timing, phase error, and decision depth sensitivities. A coherent receiver model is employed which uses the Viterbi algorithm (VA) to perform maximum likelihood sequence estimation. For (2/4,3/4), ll (3/8,4/8) and (4/8,5/8) linear phase codes, a signal-to noise ratio (SNR) power gain of 1.85 dB, 1.9 dB, and 2.4 dB at a bit error rate (BER) of 10-5 over differentially coded minimum-shift keyed (MSK) modulation are obtained, respectively. With transmitter filtering the (3/8,4/8) linear phase code to a 99% radio-frequency bandwidth of 1.02, as opposed to a 99% bandwidth of 1.2 for the unfiltered case, a decrease in the SNR gain of only 0.29 dB is experienced with the envelope deviation of the transmitted signal due to filtering being only 0.5 dB. When amplitude limiting follows this filtering configuration, the BER degradation increases to 0.47 dB. The degradations caused by band limiting can be minimized by increasing the VA decision depth. Minimum Euclidean distance bounding results show that degradation due to receiver symbol timing and phase error can also be reduced by increasing the decision depth"-- Abstract, p. ii

Advisor(s)

Ziemer, Rodger E.

Committee Member(s)

Carlson, Gordon E.
Stuller, John A.
Cunningham, David R.
Haddock, Glen

Department(s)

Electrical and Computer Engineering

Degree Name

Ph. D. in Electrical Engineering

Publisher

University of Missouri--Rolla

Publication Date

Fall 1983

Pagination

xi, 202 pages

Note about bibliography

Includes bibliographical references (pages 129-132)

Rights

© 1983 Mark Alan Wickert, All rights reserved.

Document Type

Dissertation - Open Access

File Type

text

Language

English

Thesis Number

T 4857

Print OCLC #

11311884

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