Thesis (Ph.D.)--University of Adelaide, Dept. of Electrical and Electronic Engineering, 2000? / Bibliography: leaves 203-219.

Thesis (M.S.)--University of Texas at El Paso, 2009. / Title from title screen. Vita. CD-ROM. Includes bibliographical references. Also available online.

Thesis (Ph. D.)--Rutgers University, 2007. / "Graduate Program in Electrical and Computer Engineering." Includes bibliographical references (p. 97-99).

Thesis (M.Eng.) - Carleton University, 2001. / Includes bibliographical references (p. 81-84). Also available in electronic format on the Internet.

Thesis (Ph. D.)--University of Notre Dame, 2005. / Thesis directed by Philip E. Mirowski for the Department of Economics. "December 2005." Includes bibliographical references (leaves 152-165).

In the design of the third generation of multi-media wireless networks, we are primarily concerned with the greatly varying information source rates, the quality requirements of various traffic types, the characteristics of the wireless environment, as well as the complexity and cost. Code Division Multiple Access (CDMA) cellular system is one of the most important candidates for supporting the future universal communications services. The objective of this research is to improve the capacity and the quality of service (QOS), as well as to reduce the complexity of cellular CDMA with integrated services, through improving or optimizing the design of system level operations. To facilitate the system performance and capacity evaluation, the multi-cell multi-user interference is analyzed through a new approach. The area averaged probability density function (PDF) of interference power from one active user is evaluated. The Gamma distribution is proposed for modelling the area averaged PDF of the interference power. An efficient method for evaluating system performance is developed. Differing from the Gaussian approximation, this method is very effective and accurate for both a large number and a small number of users. In this research, differing from the distance membership determination, the statistical effect of handoff is considered. The effects of soft handoff operation on multi-cell multi-user interference are analyzed. Membership statistics which are determined by soft handoff are investigated. A simple binomial model is proposed for modelling the distribution of the number of users belonging to a base station. Considering the call arrival statistics, user membership statistics and a finite number of channels available at a base station, we evaluate the call blocking/dropping rate. The minimum number of channels required at a base-station, which ensures a specified quality of service at a given capacity requirement, is determined. System capacity is further evaluated considering both outage probability limited by interference and call blocking/dropping rate limited by finite number of channels. A pilot assisted channel allocation method is proposed to minimize the number of channels required at a base station. Based on the analysis of a CDMA cellular system with a single traffic type, the design issues in developing a multi-media wireless networks are further discussed. The capacity of a CDMA cellular system with high quality requirements and mixed stream and packet types of traffic is assessed. The impact of the choice of a line rate (bit transmission rate through channel) on the system capacity is investigated. It is also shown that the power allocated to different types of traffic can be optimized to achieve maximum capacity. The optimum power allocation suggests that the power assignments to different traffic types are mainly determined by their quality requirements. / Graduate

In the past, the design of PC algorithms for CDMA systems has remained at the physical layer to compensate for slow and fast channel impairments (known as fast PC and slow PC). The TDMA/FDMA manages inter-cell interference at the beginning of the radio planning process. In SS technology, real time adaptive PC and power management algorithms would need to work coherently to ensure reliable multi-media services, and the need for this real-time hybrid structure of PC and power management has only been shown recently. The emphasis in this dissertation is therefore on the design of a QoS-based PC structure in W-CDMA applications, the ultimate goal being to evaluate the new QoS-based PC structure by means of a Monte Carlo computer simulation; a multi-user, multimedia W-CDMA simulation package. Before the design of the QoS-based PC structure, this dissertation examines and proposes a new power-sensitive model that addresses factors affecting the W-CDMA system capacity. Consequently, PC problems are put into a framework for various optimization criteria. Finally the design of a QoS-based PC structure by means of Monte Carlo computer simulation is described and evaluate. The first problem is closely related to the fact that W-CDMA is a design of a power management network architecture. The power management can co-exist in every layer of operation with different specific time scale and optimization objectives. The solution to this problem is therefore to introduce a general and mathematically tractable power-sensitive model to identify factors that influence the capacity of W-CDMA cellular systems and then articulate the general power sensitive model to form a PC framework aimed at finding a common systematic treatment for different schools of thought on PC algorithms. This dissertation proves the benefits of layered PC operation for guaranteed QoS transmission and also shows that this research coincides with and extend the literature on PC management by categorizing PC algorithms according to various optimization objectives and time scales. The second problem is to evaluate the new QoS-based PC structure in a channel coded and RAKE combining uplink UMTSIUTRA cellular environment using the Monte Carlo simulation package. The UMTS radio channel models are described in terms of frequency-selective Rayleigh fading: Indoor-Office, Outdoor and Pedestrian and Vehicular environments. The package is simulated in Matlab. The influence of the number of multipath components, of Doppler Spread, the number of received antenna, the coding scheme and multi-access interference are discussed in the dissertation. The performance evaluation criteria for utility-based PC structures are Bit-Error-Rate (BER) performance (robustness), outage performance (tracking ability) and rate of convergence. The first test shows that the new proposed unbalanced step-size closed-loop FPC schemes can provide better SINR tracking ability and better BER performance than conventional balanced step-size PC schemes. The unbalanced FPCs have better PC error distribution in all scenarios. The second test shows that the proposed BER-prediction distributed OPC schemes can provide better BER tracking ability. This scheme converges iteratively to an optimal SINR level under current network settings with no excessive interference to other active users. / Dissertation (M Eng (Electronics))--University of Pretoria, 2006. / Electrical, Electronic and Computer Engineering / Unrestricted

Zhao Fei. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2003. / Includes bibliographical references (leaves 87-89). / Abstracts in English and Chinese. / Chapter 1. --- Introduction --- p.1 / Chapter 1.1 --- Multirate Scheme --- p.2 / Chapter 1.1.1 --- VSF Scheme --- p.3 / Chapter 1.1.2 --- Multicode Scheme --- p.5 / Chapter 1.2 --- Multicode CDMA System --- p.7 / Chapter 1.2.1 --- System Model --- p.7 / Chapter 1.2.2 --- Envelope Variation of Multicode Signal --- p.9 / Chapter 1.2.3 --- Drawback of Multicode Scheme --- p.11 / Chapter 1.3 --- Organization of the Thesis --- p.13 / Chapter 2. --- Related Work on Minimization of PAP of Multicode CDMA --- p.15 / Chapter 2.1 --- Constant Amplitude Coding --- p.16 / Chapter 2.2 --- Multidimensional Multicode Scheme --- p.22 / Chapter 2.3 --- Precoding for Multicode Scheme --- p.25 / Chapter 2.4 --- Summary --- p.26 / Chapter 3. --- Multicode CDMA System with Constant Amplitude Transmission --- p.27 / Chapter 3.1 --- System Model --- p.28 / Chapter 3.2 --- Selection of Hadamard Code Sequences --- p.31 / Chapter 3.3 --- The Optimal Receiver for the Multicode System --- p.37 / Chapter 3.3.1 --- The Maximum-Likelihood Sequence Detector --- p.38 / Chapter 3.3.2 --- Maximum A Posteriori Probability Detector --- p.41 / Chapter 4. --- Multicode CDMA System Combined with Error-Correcting Codes --- p.45 / Chapter 4.1 --- Hamming Codes --- p.46 / Chapter 4.2 --- Gallager's Codes --- p.48 / Chapter 4.2.1 --- Encoding of Gallager's Codes --- p.48 / Chapter 4.2.2 --- Multicode Scheme combined with Gallager's Code --- p.52 / Chapter 4.2.3 --- Iterative Decoding of the Multicode Scheme --- p.55 / Chapter 4.3 --- Zigzag Codes --- p.59 / Chapter 4.4 --- Simulation Results and Discussion --- p.62 / Chapter 5. --- Multicode CDMA System with Bounded PAP Transmission --- p.68 / Chapter 5.1 --- Quantized Multicode Scheme --- p.69 / Chapter 5.1.1 --- System Model --- p.69 / Chapter 5.1.2 --- Interference of Code Channels --- p.71 / Chapter 5.2 --- Parallel Multicode Scheme --- p.74 / Chapter 5.2.1 --- System Model --- p.74 / Chapter 5.2.2 --- Selection of Hadamard Code Sequences --- p.75 / Chapter 6. --- Conclusions and Future Work --- p.82 / Chapter 6.1 --- Conclusions --- p.82 / Chapter 6.2 --- Future Work --- p.84 / Bibliography --- p.87

Thesis (Ph. D.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2008. / Laskar, Joy, Committee Chair ; Cressler, John, Committee Member ; Kornegay, Kevin, Committee Member ; Tentzeris, Emmanouil, Committee Member ; Lee, Chang-Ho, Committee Member.

Mobile commerce, due to its inherent characteristics of mobility and reachability in enhancing personalized services provides an excellent means for life insurers to exploit such avenue in their service offerings. The objective of this study was to determine whether mobile commerce can be used to improve the services of life insurance post-sale activities. This objective was achieved with the relevant literature and empirical study. To accomplish the objective of this treatise, a triangulated research approach was selected and a multiple-case study consisting of four cases was conducted. The four cases selected comprised of leading insurers with large market share in the life insurance market in South-Africa. The primary data were collected through questionnaire and face-to-face interviews with selected respondents. The main finding shows that the respondents had a positive view about mobile commerce and its application in their companies. This was demonstrated by 80 percent of respondents who agreed that mobile commerce was more of an opportunity rather than a challenge or even a threat for the life insurance market. The results also indicate that customer relationship management, mobile messaging services and field service automation functions were used by all the insurers; although minor discrepancies were observed due to the efficiency of each firms IT infrastructure. The Internet was found to assist in the collection of more precise data, to increase service performing abilities. Some of the major obstacles that were found to hinder the deployment of mobile commerce in the industry were security concerns, low and infrequent internet usage and performance by supporting industries. Cumbersome and inefficient legacy systems were declared as the greatest technological weakness particularly by respondents from case 1 and 2. Conversely, hardware and network infrastructure, lack of software packages, lack of technical expertise and the fear of disintermediation was rated low in hindering the deployment of mobile commerce. However, according to the findings the key benefits derived from engaging in increased mobile commerce activities include enhancing customer contact and service, more transparency and speed of claims management, increasing client retention and policy extension rates hence increasing overall company profit.