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 60 for “"gps receiver"”.
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Precision orbit determination from GPS receiver navigation solutions
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1996.
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GPS receiver tracking loop optimization using l1 theory
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1994.
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Spoofing GPS receiver clock offset of phasor measurement units
… the feasibility of a spoofing attack on the GPS receiver of a phasor measurement unit (PMU). We formulate the attack as an optimization problem where the objective is to maximize the difference between the time offset of the PMU's receiver clock before and after the attack. Since the PMU uses …
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Signal Acquisition and Tracking for a Software Gps Receiver
Global Positioning System (GPS) is a satellite-based navigation system that has been used widely both in civilian and military for positioning, navigation, timing and other position related applications. The hardware-based GPS receivers provide the least user flexibility. Thus, it is necessary to …
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Flexible control and interprocess communication on the Rogue GPS receiver
Thesis (S.B. and M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1999.
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Adaptive modeling of GPS receiver clock for integrity monitoring during precision approaches
… that exploits an overlooked resource: the receiver clock. Conventional GPS positioning requires the estimation of four parameters. In addition to three position components, the receiver clock offset from GPS time must be found. Clock-aided positioning involves removing this fourth unknown …
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Development and analysis of a parallelized direct position estimation-based GPS receiver implementation
… Global Navigation Satellite System (GNSS) receivers can achieve more accurate localization than their two-step counterparts. However, numerical solutions to DPE equations and approximations made for those equations introduce new effects that can reduce the accuracy improvement that such a …
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Collaborative Localization Enhancement to the Global Positioning System using Inter-Receiver Range Measurements
… e.g. mobile phones, laptops, and handheld GPS receivers, has gained much interest due to the benefits it provides, including quicker emergency personnel dispatch, location-aided routing, as well as commercial revenue opportunities through location based services. GPS is the dominant …
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Development and Testing of A Space-borne GPS Signal Strength Sensor
The Global Positioning System (GPS) satellite signals provide not only traditional radionavigation service but inexpensive and convenient radio beacons for signal propagation studies on ionosphere and atmosphere. This thesis describes the development and testing of a specialized GPS sensor which …
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The use of onboard diagnostics to reduce emissions in automobiles
… locations. By placing a small OBD II scanner and GPS receiver into a fleet of vehicles, emissions from these vehicles can be monitored and mapped out to show the different emissions levels on different roads. Although the plan is to develop a cheaper OBD II scanner and GPS unit to place on a few …
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The impact of GPS velocity based flight control on flight instrumentation architecture
… obtained by a Global Positioning System (GPS) receiver to close the aircraft's flight control loop. A novel framework to synthesize attitude information from GPS velocity vector measurements is discussed. The framework combines the benefits of high-quality GPS velocity measurements with a …
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Development and Demonstration of a In-Vehicle Lane Departure and Advanced Curve Speed Warning System
… can influence their performance. Other LDWS use GPS receiver with access to lane-level resolution digital maps to system's efficiency but make the overall system more complex and expensive. On the other hand, ADWS use road-level information which includes road curvature, speed-limit, position. …
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An Evaluation of a Low-Cost UAV Approach to Noxious Weed Mapping
… walk the perimeter of each patch with a handheld GPS receiver. This is the method used at Camp Williams, a National Guard Bureau training facility in Utah where this study was conducted. It was proposed that a low-cost Unmanned Aerial Vehicle (UAV) that made use of a hobbyist remote control …
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Development of Methodology for Achieving Reliable GPS Performance In 3G Handset Noisy Environments
… of Global Positioning System services (GPS) with cellular, other services and features in mobile handset, presents challenges to GPS performance. Particularly challenging is the over-the-air (OTA) interface to the GPS receiver that results from carriers like the Global System for Mobile …
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GNSS Signal Processing Techniques for Spoofing Resiliency
… uses a Controlled Reception Pattern Antenna and receiver in order to obtain direction of arrival estimates of all visible signals and their computed pseudoranges. Two contributions were produced for this method. The first contribution is an optimization of a DoA cost metric that use DoA estimates …
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Analysis of periodic behavior of GPS time series at Pacoima Dam, California
High precision GPS receiver can yield position measurements within millimeter level accuracy. This accuracy provides an opportunity to observe subtle changes such as crustal movements. In addition,it allows the monitoring of large structures such as dams for safety reason. A GPS system was …
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GIS and Satellite Visibility: Viewsheds from Space
The Global Positioning System (GPS) has recently become the significant mapping tool for millions of customers worldwide, providing its users with accurate terrestrial positions almost instantaneously. The functionality of a GPS receiver depends on the number of satellites to which it can establish …
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Real-Time Spatial Monitoring of Vehicle Vibration Data as a Model for TeleGeoMonitoring Systems
… Component, and (3) Data Analysis Component. A GPS receiver, laptop PC, data acquisition hardware, triaxial accelerometer, and client software make up the Data Acquisition Component. The Data Transfer Component consists of a wireless data network and a data server. The Data Analysis Component …
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GPS augmentation using digital spatial data
… methods and techniques which are used to augment GPS using a variety of digital spatial data. It is well known that the use of GPS can be severely compromised by various error sources such as signal obstructions, multipath and poor satellite geometry etc., especially in highly built-up areas. In …
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Investigation of Nonlinear Control Strategies Using GPS Simulator And Spacecraft Attitude Control Simulator
… The results of a Global Positioning System (GPS) hardware-in-the-loop simulation of two spacecraft flying in formation are presented. The simulations involve a chief spacecraft in a low Earth orbit (LEO), while a deputy spacecraft maintains an orbit position relative to the chief spacecraft. …
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