Doctor of Social Work / This doctoral thesis presents the findings of a qualitative research project which examines the impact of university study on a group of twenty female and male mature-age students at the University of Newcastle, Australia, who have entered university via a non-traditional pathway. The students who are the subject of this thesis are in the second to final years of their undergraduate degree programs and have all faced significant hurdles in gaining university entrance and persevering with their studies. The majority have come from lower socio-economic backgrounds with little, if any, family history of higher education and little positive experience of prior study. Postmodern feminist theory has primarily informed this research, using a narrative method to gather the data, analyse the results and present the findings. This thesis describes the experiences of the twenty individuals, derived from their individual narratives. As such, it gives voice to their stories: their triumphs and achievements as well as their struggles. It examines the gender issues that are at work in the shaping of their experiences, including the ways in which gender affected the type and extent of help and support on which they could rely. It highlights the transformative nature of these experiences for each of the students in this cohort, as well as potentially the next generation, and makes some tentative connections between these individual experiences and the experiences of the wider mature-age university student population. The narratives that individuals tell are socially and culturally located. Hence it is likely that the experiences of these twenty students may reflect, at least to some extent, the experiences of other mature-age students within a similar culture. The findings of this research also highlight the important role that higher education institutions can play, not only in widening access to higher education, but also in encouraging and assisting students, from a diverse range of backgrounds, to participate fully in higher education and achieve their goals.

The introduction of cellular wireless systems in the 1980s has resulted in a huge demand for personal communication services. This demand has made larger capacity systems necessary. This has been partially satisfied by the introduction of second generation digital systems. New third generation systems are now under going standardisation and will require even more efficient utilisation of the spectrum if the high bandwidth features and larger capacity are to become a reality. Motivated by these growing requirements we discuss methods of achieving large improvements in spectral efficiency and performance. Multiple-user communications over a channel can only be achieved with some form of diversity. In this work we point out that the efficient utilisation of the dimensions of space, time, and frequency will ultimately maximise the system capacity of a multiple-user system. We apply our receiver techniques solely to the base-station design where capacity limitations are currently present. We note however, that some of these techniques could also be applied at the mobile terminal receiver. We primarily focus our attention on the direct-sequence code-division multiple-access (DS/CDMA) channel, since this channel is inherently interference limited by other users in the cell of interest. We exploit a new powerful channel coding technique named " turbo coding" for its iterative decoding approach. We show how we can substitute the inner convolutional code of a turbo code encoder with the CDMA channel. By " iterative detection/decoding" or " turbo equalisation" at the receiver we achieve performance results which show the interference from other users to approach complete removal. We develop and analyse a new, low complexity, iterative interference canceller/decoder. This receiver has complexity per user linear with the memory of the channel and independent of the number of users in the system. We extend this receiver to more realistic channels that are asynchronous and include multi-path, and include spatial diversity by using an antenna array at the receiver. The CDMA channel we study exclusively uses randomly generated spreading codes. With this channel model we still achieve single user performance (no interference from other users) with a 10logL gain from L antenna elements and a gain of up to 10logP from P multi-path components. With any new receiver design, sensitivity to channel parameter errors is of paramount interest. We find that the sensitivity of our receiver is low with respect to the parameter errors induced. This is as we desire for a realisable receiver design. Finally we investigate the application of this new iterative interference canceller/decoder receiver to a number of other interference channels. These include the intersymbol interference (ISI) channel, partial response signalling (PRS), and continuous phase modulation (CPM). For these channels excellent performance improvement is generally achieved by the utilisation of the iterative interference canceller/decoder solution. / Thesis (PhD)--University of South Australia, 1999

Thesis (Ph. D.)--University of Hawaii at Manoa, 2005. / Includes bibliographical references (leaves 84-89).

Zugl.: Saarbrücken, Univ., Diss., 2007

Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1994. / Vita. Abstract. Includes bibliographical references (leaves 87-91). Also available via the Internet.

Project (M.Eng.) - Simon Fraser University, 2004. / Theses (School of Engineering Science) / Simon Fraser University.

Thesis (M. Phil.)--University of Hong Kong, 2000. / Includes bibliographical references (leaves 116-121).

Thesis (Ph. D.)--University of Hong Kong, 2000. / Includes bibliographical references (leaves 108-114).

Thesis (M. Phil.)--University of Hong Kong, 1998. / Includes bibliographical references (leaf 92-96).

Thesis (M. Phil.)--University of Hong Kong, 2000. / Includes bibliographical references (leaves 58-63).