-
Article
Open AccessMachine learning based LOS/NLOS classifier and robust estimator for GNSS shadow matching
Global Navigation Satellites Systems (GNSS) is frequently used for positioning services in various applications, e.g., pedestrian and vehicular navigation. However, it is well-known that GNSS positioning perfo...
-
Chapter and Conference Paper
A Fuzzy Logic-Based Weighting Model for GNSS Measurements from a Smartphone
GNSS navigation is critical in unfavourable scenarios, where the solution can be degraded by errors such as multipath reflections and weak geometries caused by obstacles surrounding the receiver. Nonetheless, ...
-
Chapter
A Machine Learning Approach for Walker Identification Using Smartphone Sensors
Nowadays, smartphones equipped with MEMS sensors like accelerometers, gyroscopes, and magnetometers. In this work we exploited this kind of sensors to provide advanced information about the bringing the sm...
-
Article
PANG-NAV: a tool for processing GNSS measurements in SPP, including RAIM functionality
Global Navigation Satellite Systems (GNSSs) are theoretically able to provide accurate, three-dimensional, and continuous positioning to an unlimited number of users. An important shortcoming of GNSS is the la...
-
Article
A resampling strategy based on bootstrap to reduce the effect of large blunders in GPS absolute positioning
In the absence of obstacles, a GPS device is generally able to provide continuous and accurate estimates of position, while in urban scenarios buildings can generate multipath and echo-only phenomena that seve...
-
Article
Time-differenced carrier phases technique for precise GNSS velocity estimation
Classically, a stand-alone GNSS receiver estimates its velocity by forming the approximate derivative of consecutive user positions or more often by using the Doppler observable. The first method is very inac...
-
Article
Open AccessA Galileo IOV assessment: measurement and position domain
The European GNSS, Galileo, is currently in its in-orbit validation (IOV) phase where four satellites are finally available for computing the user position. In this phase, the analysis of the measurements and...
-
Article
Real-Time Receiver Clock Jump Detection for Code Absolute Positioning with Kalman Filter
In global navigation satellite systems (GNSS) navigation the receiver and satellite clocks play a key role. The receivers are usually equipped with inaccurate quartz clocks, which experiment large drift relati...
-
Chapter and Conference Paper
Roll and Pitch Estimation Using Visual Horizon Recognition
In guidance and automated control system, especially for unmanned vehicle, attitude determination is an important element. Generally this parameter is provided by sensors like INS (Inertial Navigation Systems)...
-
Article
Assessment of NeQuick ionospheric model for Galileo single-frequency users
The ionosphere is the main error source in GNSS measurements and in extreme cases can degrade the positioning significantly, with errors exceeding 100 m; therefore, modelling and predicting of this type of err...
-
Article
A stochastic sigma model for GLONASS satellite pseudorange
The GLONASS (Global Navigation Satellite System) is a satellite positioning system able to provide various numbers of air, marine, and any other type of users with all-weather three-dimensional positioning, ve...
