New pulse shapes for enhanced spectral efficiency in digital radio communications
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Authors
Nga, Chee Wei.
Subjects
Advisors
Kragh, Frank
Date of Issue
2007-09
Date
Publisher
Monterey California. Naval Postgraduate School
Language
Abstract
Linear modulation schemes such as phase shift keying (PSK) and quadrature amplitude modulation (QAM) are inherently spectrally efficient. This research seeks enhanced spectral efficiency by designing new spectrally efficient pulse shapes for such digital modulations. The pulses designed are of finite duration and exhibit zero intersymbol interference when received through an additive white Gaussian noise (AWGN) channel. It is shown that the resulting communications signals have optimal spectral roll-off while maintaining optimum bit error ratio performance when received via an AWGN channel. The bandwidths and power spectral densities of communications signals using these pulses are compared with traditional spectrally efficient communications signals.
Type
Thesis
Description
Series/Report No
Department
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
xii, 69 p. ;
Citation
Distribution Statement
Approved for public release; distribution is unlimited.