Thesis (B.A.)--Haverford College, Dept. of Mathematics, 2004. / Includes bibliographical references.

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Thesis (Ph. D.)--Lehigh University, 2005. / Includes vita. Includes bibliographical references (leaves 237-240).

Thesis (M.Sc.)--City University of Hong Kong, 2000. / "Submitted in partial fulfilment of the requirements for the degree of Master of Science in materials technology and management from City University of Hong Kong." Title from title screen (viewed on Aug. 31, 2006) Includes bibliographical references.

In this thesis a UWB-based ranging scheme is designed, simulated, implemented and tested. This system was designed to address the problem of safely unloading cargo crates to ships in the open seas. UWB antennas are placed on the four corners of the cargo crate, providing the information needed to a ranging/positioning algorithm that estimates the orientation and distance of the ship's deck from the crate. Furthermore, the system is successfully tested in a 1/24 scale demonstration. In addition to the UWB ranging application, this thesis evaluates an already proposed modification to the traditional narrowband link budget based on the Friis transmission formula. The proposed modification replaces frequency-domain parameters with time-domain values to handle the wide bandwidth of UWB systems. The proposed approach is shown via measurements to be much more accurate than the traditional technique. / Master of Science

ITC/USA 2011 Conference Proceedings / The Forty-Seventh Annual International Telemetering Conference and Technical Exhibition / October 24-27, 2011 / Bally's Las Vegas, Las Vegas, Nevada / The National Aeronautics and Space Administration (NASA) Space Network (SN) consists of a Space Segment, composed of the Tracking and Data Relay Satellite (TDRS) fleet, and a Ground Segment that includes the White Sands Ground Terminal (WSGT), Second TDRS Ground Terminal (STGT) and the Guam Remote Ground Terminal (GRGT). Collectively, the SN Ground Segment is commonly referred to as the White Sands Complex (WSC). Traditional methods of latency and performance measurement across the component links of network have relied on the use of simplified test patterns and basic data formats that are often specific to the instruments providing the measurements. These tests do not often correlate to the operational data normally transferred through the network. This paper discusses an alternative approach to performance measurement within the Space Network. By embedding and extracting performance metrics directly within simulated data sets that closely resemble operational traffic, performance measurement can be combined with link verification and validation to provide a single, comprehensive set of test and measurement activities.

Hasta el 2012, con la digitalización de las señales de televisión por satélite, por cable y últimamente también de la televisión terrestre, se vienen presentando en el país requerimientos técnicos similares a los de países denominados desarrollados, con un dinamismo cada vez mayor que ha obligado la creación de empresas locales altamente especializadas en la implementación de Up Links para DTH, transmisiones deportivas con tecnología digital de última generación, inserción de nuevos canales en las grandes cabeceras CATV, la centralización de canales en las mismas, etc. El día a día de éste tipo de empresas es la configuración en planta y la instalación de complejos sistemas que incluyen encoders, multiplexers, amplificadores, decoders, módems, routers, antenas parabólicas con diámetros que van desde 1.2m hasta 9m. Los cálculos de enlace (link budget) son realizados ahora localmente sin depender ya de los cálculos de los operadores satelitales, para lo cual se emplean programas de computador avanzados y precisos.