Thesis (M.A.) - Carleton University, 2007. / Includes bibliographical references (p. 147-155). Also available in electronic format on the Internet.

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

Thesis (M.Ed.(Curriculum Studies))--University of Pretoria, 2006. / Summary in English. Includes bibliographical references. Available on the Internet via the World Wide Web.

Thesis (B.Psy.Sc.(Hons.)) - University of Queensland, 2006. / Includes bibliography.

Thesis (MTech (Information Technology))--Cape Peninsula University of Technology, 2009 / The objective of this research project was to provide an answer to the question: 'Which access channel is the most appropriate for mobile applications?' This question is posed by providers of mobile banking services and providers of mobile banking applications alike.

The conventional single-user correlation receiver is not optimized for use with a multiple-access channel shared by users transmitting asynchronously independent data streams by modulating a set of assigned signal waveforms with low mutual cross-correlations. Furthermore, the performance is severely degraded as the number of users in a radio-network with fixed bandwidth grows or as the relative powers of the interfering signals become large, as in the "near-far" problem. The optimum multiuser detector based on a dynamic programming algorithm has substantially better performance, but has a variable decoding delay and is computationally intensive due to the NP-hardness of the problem of computing the most likely sequence of symbols from the sufficient statistics and signal cross-correlations. Interest has grown in suboptimal demodulation schemes which exhibit a low order of complexity to ensure their practical implementation, but not exhibiting the impairment of the conventional single-user detector. The multistage detection strategy for coherent demodulation in asynchronous code-division multiple-access systems is such a suboptimal detection scheme based on successive estimation and removal of the multiple-access interference, and requires a computational complexity per symbol which is linear in the number of users, in contrast to the exponential complexity of the optimum demodulator. This project presents simulation results for the performance of a multistage detector for varying number of interfering users, and different combinations of desired user versus interfering users' signal energies. It is shown that the performance approaches that of communIcations as the interfering signals become stronger. The near-far problem is therefore alleviated. Results also indicate that one stage in the receiver is required to reject interference from users at each of the various power levels. This receiver could be modified for use in practical CDMA systems by designing a multistage receiver which forms successive estimates of the channel state in addition to the interference. / Master of Science

Thesis (Ph.D.)--University of Melbourne, Dept. of Information Systems, 2010. / Typescript. Includes bibliographical references.

Thesis (M.B.A.)--University of Hong Kong, 1985.

Thesis (M.B.A.)--University of Hong Kong, 1999. / Includes bibliographical references (leaf viii).

The aim of this study was to determine which land line telephone and/or mobile/cellular telephone will enable an individual with a cochlear implant to achieve the best speech discrimination scores. Objective measurements and the subjective experience of the individual were used. The literature review provided an overview on the telephone abilities of individuals fitted with cochlear implants. In this study three factors, the quality of the telephone, the speaker's voice and different speech-coding strategies, were discussed and examined, in order to explore and explain the technical difficulties commonly experienced by this population regarding the successful use of a telephone. Data regarding various telephones and the influence different voice-types has on the telecommunication abilities were obtained through the execution of the methodology. Telephone abilities on five different telephones were assessed. Ten participants, four females and six males, fitted with the ESPrit 22, ESPrit 24 and ESPrit 3G Nucleus cochlear implants were used. The Central Institute for the Deaf (CID) open-set sentences were used and data was statistically analysed using a split plot design. Significant differences between different types of telephones were found. The results also suggested that different voice types have an impact on these individual's ability to use a telephone independently. Possible reasons such as different coding strategies, technical interference and quality of voices were discussed. Recommendations for developing rehabilitation programs, to obtain successful telephone competence for these individuals, were made and discussed. The study aimed to empower technologists working in this field to actively take note of the need for development and continuous research regarding various telephones. These telephones should enable more individuals fitted with cochlear implants to receive the maximum speech discrimination with the minimum interference. The findings of this study should encourage future research regarding this topic. A more extensive range of telephones should be used and compared to the findings in this study. / Dissertation (M (Communication Pathology))--University of Pretoria, 2006. / Speech-Language Pathology and Audiology / Unrestricted