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 17 of 17 for “"GNSS receiver"”.
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Improving High Sensitivity GNSS Receiver Performance in Multipath Environments for Vehicular Applications
Generally, standalone GNSS receiver architectures cannot provide a position accuracy suitable for use in vehicular applications in urban canyon scenarios. Specifically, GNSS signals are affected by the surrounding objects, such as high buildings, trees, etc., which will introduce multipath errors. …
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Design and Simulation of a Planar Crossed-Dipole Global Navigation Satellite System (GNSS) Antenna in the L1 Frequency Band
… cross-dipole Global Navigation Satellite System (GNSS) receiver antenna to operate in GNSS L1 frequency band with multipath mitigation performance. First, a crossed-half-wavelength dipole antenna was designed to resonate centered at 1.6 GHz, and then various configurations were investigated and …
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Dense, sonar-based reconstruction of underwater scenes
… differential global navigation satellite system (GNSS) receiver with an accurate attitude and heading reference system-to instrument the pose of a mapping sensor such as a multibeam sonar.
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Performance analysis of assisted-GNSS receivers
… of Global Navigation Satellite System (GNSS) receivers that use assistance data provided by cellular networks. A typical example of such a receiver is a mobile phone including a Global Positioning System (GPS) receiver. Using assistance data such as an accurate estimate of the GPS system …
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Development of a Data Collection System for Tightly Integrated GNSS, IMU, Radar, and LiDAR Navigation
… can safely rely on multiple sensors including GNSS, IMU, Radar and LiDAR to navigate with high accuracy, integrity, continuity, and availability in complex urban environments. Many existing data sets, collected with multi-sensor platforms, focus on validating different variations of visual …
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GNSS-based Spacecraft Formation Flying Simulation and Ionospheric Remote Sensing Applications
The Global Navigation Satellite System (GNSS) is significantly advantageous to absolute and relative navigation for spacecraft formation flying. Ionospheric remote sensing, such as Total Electron Content (TEC) measurements or ionospheric irregularity studies are important potential Low Earth Orbit …
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Implementation of Real-Time Software Receiver for Gps or Glonass L1 Signals
A 12 channel real-time GPS L1 C/A-code software receiver has been implemented on a Desktop with 1.84GHz Intel CPU. The software receiver has the capability to acquire new satellites coming in, keep tracking of satellites in view and give a user solution accuracy of 30 meters. This study also …
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UAV-based investigations into the hydrology and dynamics of the Greenland Ice Sheet
… ground-based Global Navigation Satellite System (GNSS) measurements, which can provide continuous and accurate point measurements, or through satellite remote sensing, which can provide regional-scale observations but at coarse temporal resolutions. This thesis investigates the potential of …
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Precise Point Positioning – The evolution of an alternative GNSS positioning solution
… available Global Navigation Satellite System (GNSS) orbit and clock correction products to perform point positioning using a single GNSS receiver. Over the last 20 years, the New South Wales (NSW) state government has invested in Continuously Operating Reference Station (CORS) infrastructure, …
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Dense, sonar-based reconstruction of underwater scenes
… differential global navigation satellite system (GNSS) receiver with an accurate attitude and heading reference system—to instrument the pose of a mapping sensor such as a multibeam sonar. For underwater platforms, the rapid attenuation of electromagnetic signals in water precludes the use of GNSS …
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Contributions to a Context-Aware High Sensitivity GNSS Software Receiver
GNSS have established themselves as the dominant positioning technology to provide location and navigation solutions with high reliability and accuracy with low-cost portable user devices. However, receiver performance can be significantly affected by operational environments. High attenuation and …
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GNSS-based Hardware-in-the-loop Simulation of Spacecraft Formation Flight: An Incubator for Future Multi-scale Ionospheric Space Weather Studies
… based on Global-Navigation-Satellite-Systems (GNSS) have been developed to support GNSS-based SFF mission design, however, none of these testbeds has been directly applied to ionospheric space weather studies. The Virginia Tech Formation Flying Testbed (VTFFTB), a GNSS-based HIL simulation …
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The Global Navigation System Scope (GNSScope): a toolbox for the end-to-end modelling simulation and analysis of GNSS
… to as the Global Navigation System Scope (GNSScope) Toolbox, offering a complete, fully reconfigurable platform for the end-to-end modeling, simulation and analysis of satellite navigation signals and systems, covering the signal acquisition, tracking, and range processing operations that …
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Real-time kinematic software using robust Kalman filter and dual-frequency GPS signals for high precision positioning
… developed algorithm, data from Novatel and NRG-GNSS receiver have been intensively analyzed and processed. With static and dynamic short baseline real-time data, this new developed RTK software presents robust real-time centimeter to millimeter solution precision and fast and reliable ambiguity …
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GPS multi-receiver direct position estimation for aerial applications
… and landing. In this regard, we propose Multi-Receiver Direct Position Estimation (MR-DPE), which operates a network of DPE receivers to enhance GPS measurement certainty in degraded signal environments. A DPE receiver directly estimates navigation solutions in the PVT domain with a …
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Study and implementation of simplistic spoofing countermeasures for smartphones and unmanned aerial vehicles
L'abstract è presente nell'allegato / the abstract is in the attachment
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Study and Design of Bayesian Methods for GNSS in Challenging Environments
L'abstract è presente nell'allegato / the abstract is in the attachment