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.
Results
Showing 1 to 20 of 49 for “"Data communications"”.
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Polarization Division Multiplexing for Optical Data Communications
… parallel channels are ubiquitous in optical communications, with spatial division</p>multiplexing (separate physical paths) and wavelength division multiplexing (separate optical</p>wavelengths) being the most common forms. In this research work, we investigate the viability</p>of …
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Data communications via cable television networks : technical and policy considerations
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1983.
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Satellite Data Communications Link Requirements for a Proposed Flight Simulation System
… to investigate the requirements necessary for data and voice communication via satellite, linking Embry-Riddle Aeronautical University (ERAU) and other flight training facilities. The proposed research was conducted following a descriptive method of collecting information, generating and …
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Packet data communications over coded CDMA with hybrid type-II ARQ
… of turbo-coded CDNIA systems in packet data communication terminology. It is divided into three parts; (1) CDMA with hybrid FEC/ARQ in deterministic environment, (2) CDMA with hybrid FEC/ARQ in random access environment and (3) an implementation issue on turbo decoding. As a preliminary, …
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Emerging solution-processable light-emitting diodes for next-generation data communications
… that has gained substantial attention for data communications in recent years. This can be attributed to their advantageous characteristics, such as low cost, low power consumption and eye-safe properties. Additionally, high-speed LEDs are particularly attractive for Internet of Things …
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Ultrasound Data Communications for Ultra-low-power Wake-up in Sensor Nodes
… implemented on a commercial FPGA. An ultrasound data network consisting of three receivers and one transmitter was set up in a lecture hall. For a transmit power of 27 uW, less than 10 % of the wake-up packets, at 1 pkt/s, were missed at each of the three receivers. All the system blocks: …
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Analytical and simulation performance modelling of indoor infrared wireless data communications protocols
… cost, low power and short-range indoor wireless data communications. Low-cost optoelectronic components with an unregulated IR spectrum provide the potential for very high-speed wireless communication with good security. However IR links have a limited range and are susceptible to high noise …
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The Dual Use of Power Distribution Networks for Data Communications in High Speed Integrated Circuits
This thesis investigates a new data communication method in high speed integrated circuits using power distribution networks (PDNs). The conventional purpose of PDNs in integrated circuits (ICs) is to deliver power to internal nodes of an IC while meeting a level of power integrity. As the power …
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An analysis of alternative data communications networks for the Federal Aviation Administration's weather message switching center replacement
… and life cycle cost of commercially available data communication networks for the Federal Aviation Administration’s Weather Message Switching Center Replacement (WMSCR) were analyzed. Only existing commercial networks large enough to handle the WMSCR traffic load were considered. The …
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Design and modelling of clock and data recovery integrated circuit in 130 nm CMOS technology for 10 Gb/s serial data communications
… phase and frequency-locked loop based clock and data recovery (PFLL-CDR) integrated circuit, as well as the Verilog-A modeling of an asynchronous serial link based chip to chip communication system incorporating the proposed concept. The proposed design was implemented and fabricated using the …
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An investigation into a DSP implementation of partial response signaling for 4800 bits per second full-duplex data communications over M.1020 telephone lines
This thesis investigates high-speed digital transmission over a conditioned, voice-grade telephone circuit (M.1020), using a technique known as partial response signaling, or PRS. In particular, the case where 4800 bps, full-duplex transmission is required in a CCI'PT V. 22 type format is …
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Practical considerations in the design of cellular digital packet data (CDPD) equipment
Cellular Digital Packet Data (CDPD) is a new wireless packet data communications system which was developed by a consortium of U.S. cellular service providers to augment their voice communications systems. The main goal of the CDPD system design was to provide wireless packet data connectivity to …
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FPGA Prototyping Framework on ARROW SoCKit Board with Xillybus Interface and Standard FIFO
… board. The framework utilizes the Xillybus data transport interface to handle data communications between the on-board ARM processor and the FPGA. This thesis further presents the data communications interface requirements as well as a transmission time analysis for data transfer between the …
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Information Technology Implementation Decisions to Support the Kentucky Mesonet
… being developed across the commonwealth. Data communications, collection, processing, and delivery mechanisms play a critical role in such networks, and the World Meteorological Organization recognizes that “an observing system is not complete unless it is connected to other systems that …
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Performance analysis of VSAT networks
… the increasing demand for low-density voice and data communications. Spread Spectrum and single-channel-per-carrier (SCPC) transmission techniques work well for multiple access purposes while allowing the earth station antennas to remain small. Direct sequence code division multiple access …
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Fully Integrated Data and Power Transfer Systems with Galvanic Isolation
… addressed to the implementation of isolated data transfer and it is currently used for mass production. In this context, the principal purpose of my work was the investigation on a fully integrated dc-dc power converter with half-duplex data communications providing on chip galvanic isolation …
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The challenge of smooth transition from R&D business for innovation in a telecom company
… occurred in the 1990s: IP and wireless communications. Originally, IP was used only for data communications, but it has now evolved to include voice communications as VolP. This had a huge impact on telecom companies because IP has destroyed the legacy cost structure that was based on a …
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Reliable and secure information and communications systems for electrical utilities
… asset identification is considered. Restricting data flows is a solution for security issues in certain classes of applications and the data diode is an example of such an implementation. This has been demonstrated in a smart grid context using standardized phasor measurement data. To make this …
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Interface conversion between CCITT recommendations X.21 and V.24
… X.21 and V.24. The evolution of public data networks against the background of data communications using the telephone network is outlined. The DTE/DCE interface is identified as being of particular importance and is explained in terms of the ISO model for Open Systems interconnection …
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