Digital transmission: Spectrally efficient techniques (1984)
Type of ContentTheses / Dissertations
Thesis DisciplineElectrical Engineering
Degree NameDoctor of Philosophy
PublisherUniversity of Canterbury. Electrical Engineering
AuthorsHenderson, Brian Gordonshow all
Spectrally efficient methods of digital transmission are studied, with particular emphasis on vestigial sideband (VSB) signalling. A general overview of digital transmission techniques gives a basis for more detailed studies into the areas of interest. Alternative methods of generating and detecting VSB are covered, offering possible ways of simplifying system implementation. A method of synchronizing VSB is proposed and analysed, giving a simple solution to the synchronization problem. VSB, as a spectrally efficient signalling format, is shown to be suitable for transmission over nonlinear channels; its performance comparing favourably with alternative systems. A new method of attaining spectrally efficient transmission is analysed. This combines VSB and quadrature modulation to obtain a signal with double the spectral efficiency of VSB. With suitable decoding this increased spectral efficiency is obtained at the expense of only a small sacrifice in power efficiency.