Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 20 for “"cellular telephone"”.
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Minimizing the impact of model changeovers at a medium-mix high-volume cellular-telephone production line
Thesis (M.S.)--Massachusetts Institute of Technology, Sloan School of Management, 1996, and Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
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A framework for global business strategy planning for the wireless telecommunication carrier
Within 27 years from 1979 when the first analogue cellular telephone system was launched, the Wireless Telecommunication industry has evolved drastically. Its technology and service are now in third generation: 3G, and already moving forward to 4G. Within a few years, it will enable the exchange of …
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Performance analysis of CDMA systems in multipath channels
… have made CDMA especially attractive for cellular telephone systems and other wireless networks. This thesis project is divided into four tasks. The first objective is to implement a channel model incorporating multiple access interference and to verify the results. A method is used that …
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Error and erasure decoding for a CDPD system
Cellular digital packet data (CDPD) is a new service for wide-area data communication with wireless mobile users. CDPD system uses the existing infrastructure of the analog Advanced Mobile Phone Service (AMPS) cellular telephone network to transmit data with a channel hopping technique. The CDPD …
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Design and Implementation of an FPGA-based Adaptive filter Single-User Receiver
… The Code Division Multiple Access (CDMA) cellular system had been proposed for use as a new standard for cellular telephone systems. A great deal of research has been conducted to develop receiver structures useful for CDMA systems. Traditional receivers such as the correlation and RAKE …
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Performance of Hyperbolic Position Location Techniques for Code Division Multiple Access
… (FCC) recently adopted rules requiring cellular telephone, Personal Communication System (PCS) and Specialized Mobile Radio (SMR) licensees to provide two dimensional automatic location information (ALI) for a user requesting E-911 service. These wireless service providers will need to …
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Community and collaboration : new shared workplaces for evolving work practices
… it was the wireless Internetconnected laptop and cellular telephone that truly enabled work to be accomplished anywhere, from the daily train commute to the local coffee shop. New shared workplace typologies are broadening the spectrum of alternative workplaces and offer footloose workers a …
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Bit error rate simulation enhancement and outage prediction in mobile communication systems
This thesis presents enhancements made to software designed for simulating digital mobile radio communication systems. Internally generated two-ray Rayleigh fading channel models as well as imported spatially varying complex channel impulse responses can be utilized in simulations. Implementation …
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Bluetooth technology
… universal short-range radio link. For example, a cellular telephone and a portable computer equipped with the Bluetooth technology can interface without the need for cables. Further, they could interoperate with similarly equipped devices such as printers, fax machines, desktop computers and …
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Usability Evaluation of Notebook Computers and Cellular Telephones Among Users with Visual and Upper Extremity Disabilities
… appliances such as notebook computers and cellular telephones are becoming integral to the lives of many. These devices facilitate a variety of communication tasks, and are used for employment, education, and entertainment. Those with disabilities, however, have limited access to these …
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Wireless ATM Networks Medium Access Control with Adaptive Parallel Multiple Substream CDMA Air-inteface
… compared to the TDMA method as proven in the cellular telephone industry. The main reason behind the relatively broader support for the TDMA method is that the source bit rate is generally higher compared to the DS-CDMA method since the maximum data rate per mobile unit is limited by the …
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Low Profile Integrated GPS and Cellular Antenna
… antenna that operates at both the conventional cellular telephone band of 824 to 894 MHz and the civilian GPS L1 frequency of 1575 MHz. The combined antenna unit has a lateral diameter of less than 4 inches (10 cm) and its height is less than 2 inches (5 cm). The integrated unit is a hybrid …
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Auditory-Based Supplemental Information Processing Demand Effects on Driving Performance
… of questions designed to replicate the use of a cellular telephone while driving. The IVIS tasks consisted of two levels of information density (short-term memory load) and four element types (complexity levels) including listening, interpretation, planning, and computation. The effects of age, …
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Wavelet based design of digital multichannel communications systems
… effective communication systems. At present, the cellular telephone network is perhaps the most evident example of communication system that has had a great impact on the lives of ordinary people and, at the same time, is the subject of interest of many researchers both at academic and industrial …
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Data mining, fraud detection and mobile telecommunications: call pattern analysis with unsupervised neural networks
Huge amounts of data are being collected as a result of the increased use of mobile telecommunications. Insight into information and knowledge derived from these databases can give operators a competitive edge in terms of customer care and retention, marketing and fraud detection. One of the …
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Linearity and monotonicity of a 10-bit, 125 MHz, segmented current steering digital to analog converter
The purpose of this research is to determine the linearity and monotonicity of the THS5651IDW digital to analog converter (DAC), a prototype of the future Texas Instruments TLV5651, 10-bit, 125 MHz communication DAC. Testing was conducted at the Texas Instruments facility on Forest Lane, Dallas, …
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Factors influencing customer churn rate and retention in the mobile market
Dissertation submitted in compliance with the requirements for the Master's Degree in Technology: Business Administration, Durban University of Technology, Durban, South Africa, 2008.
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Capacity and Throughput Optimization in Multi-cell 3G WCDMA Networks
… in the computation of the traffic density in a cellular network, which can be used to optimize the placement of base stations and radio network controllers as well as to analyze the performance of resource management algorithms towards meeting the final goal: the calculation and maximization of …