Essays about: "thesis of satellite signals"

Showing result 1 - 5 of 34 essays containing the words thesis of satellite signals.

1. 1. Robust Aircraft Positioning using Signals of Opportunity with Direction of Arrival

   University essay from Linköpings universitet/Reglerteknik

   Author : Erik Axelsson; Sebastian Fagerstedt; [2023]
   Keywords : Simultaneous localisation and mapping; direction of arrival; signals of opportunity; extended Kalman filter; positioning;

   Abstract : This thesis considers the problem of using signals of opportunity (SOO) with known direction of arrival (DOA) for aircraft positioning. SOO is a collective name for a wide range of signals not intended for navigation but which can be intercepted by the radar warning system on an aircraft. READ MORE

3. 2. Guardrail detection for landmark-based localization

   University essay from Uppsala universitet/Avdelningen för systemteknik

   Author : Nils Gumaelius; [2022]
   Keywords : computer vision; LiDAR; object detection; localization; landmark-based localization; guardrail detection; dbscan; autonomous driving;

   Abstract : A requirement for safe autonomous driving is to have an accurate global localization of the ego vehicle. Methods based on Global Navigation Satellite System (GNSS) are the most common but are not precise enough in areas without good satellite signals. Instead, methods likelandmark-based localization (LBL) can be used. READ MORE

4. 3. Indoor 5G Positioning using Multipath Measurements

   University essay from Linköpings universitet/Institutionen för systemteknik

   Author : Andreas Lidström; Martin Andersson; [2022]
   Keywords : Multipath Propagation; 5G Networks; Target Tracking; Sensor Fusion; Positioning; Particle Filter; Kalman Filter;

   Abstract : Positioning with high precision and reliability is considered as an important feature of new wireless radio networks such as 5G. In areas where satellite positioning is not available or is not reliable enough, 5G can work as an alternative. An example is inside factories where autonomous vehicles might need to be positioned in complex environments. READ MORE

5. 4. The Effect of Distortions Induced by Adaptive Antenna Arrays in GNSS Applications

   University essay from Linköpings universitet/Kommunikationssystem; Linköpings universitet/Tekniska fakulteten

   Author : Emma Beskow; [2022]
   Keywords : GNSS; GPS; Jamming; Beamforming; Adaptive antenna arrays; Frequency response distortions;

   Abstract : Global Navigation Satellite Systems (GNSS) are vital tools for accurate navigation and timing for both civil and military use. Due to the low power of the GNSS signals, these systems are sensitive to interference attacks. For wideband GNSS jamming, adaptive antenna arrays are commonly used to suppress interference. READ MORE

6. 5. Behind the early warning: Improving impact-based forecasting of riverine floods in Malawi using passive microwave remote sensing

   University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Author : Lone Mokkenstorm; [2021]
   Keywords : Physical Geography; Ecosystem Analysis; Early Warning; Riverine Floods; Humanitarian Work; Impact-based Forecasting; Malawi; Earth and Environmental Sciences;

   Abstract : This thesis investigates whether freely available, coarse-resolution, Passive Microwave Remote Sensing (PMRS) data (37 GHz) can be effectively used for early warning systems for floods in Malawi. The Shire River Basin in Chikwawa and the smaller-scale North Rukuru River Basin in Karonga were studied using two alternative, ratio-based satellite indices that make use of the signal difference between wet and dry pixel cells: The m index and the rcmc index. READ MORE