A5075292110- GNSS positioning and interference
- Inertial Sensor and Navigation
- Radio Astronomy Observations and Technology
- Indoor and Outdoor Localization Technologies
- Wireless Communication Networks Research
- Astronomical Observations and Instrumentation
- Direction-of-Arrival Estimation Techniques
- Target Tracking and Data Fusion in Sensor Networks
- Antenna Design and Optimization
- Geophysics and Gravity Measurements
- Distributed and Parallel Computing Systems
- Advanced Wireless Communication Techniques
- Radar Systems and Signal Processing
- Vehicular Ad Hoc Networks (VANETs)
- Satellite Communication Systems
- Computational Physics and Python Applications
- Advanced Frequency and Time Standards
- Scientific Computing and Data Management
- Traffic Prediction and Management Techniques
- Advanced Computational Techniques and Applications
- Ionosphere and magnetosphere dynamics
- Advanced Photonic Communication Systems
- Bluetooth and Wireless Communication Technologies
- Aging, Health, and Disability
- Autonomous Vehicle Technology and Safety
Centre Tecnologic de Telecomunicacions de Catalunya
2013-2024
Universitat Politècnica de Catalunya
2017-2019
La Salle University
2017-2019
Institut polytechnique de Grenoble
2017-2019
U.S. Air Force Institute of Technology
2019
Technical University of Applied Sciences Würzburg-Schweinfurt
2019
National University of Sciences and Technology
2019
Fraunhofer Institute for Integrated Circuits
2019
Universität der Bundeswehr München
2019
Institute of Space Technology
2019
One of the main vulnerabilities GNSS receivers is their exposure to intentional or unintentional jamming signals, which could even cause service unavailability. Several alternatives counteract these effects were proposed in literature, being most promising those based on multiple antenna architectures. This specially case for high-grade used applications requiring reliability and robustness. article provides an overview possible receiver architectures encompassing arrays associated signal...
<h3>Abstract</h3> Taking the work conducted by global navigation satellite system (GNSS) software-defined radio (SDR) working group during last decade as a seed, this contribution summarizes, for first time, history of GNSS SDR development. This report highlights selected implementations and achievements that are available to public or influenced general development SDR. Aspects related standardization process intermediate-frequency sample data metadata discussed, an update Institute...
This work addresses the signal acquisition problem using an array of antennas in general framework Global Navigation Satellite Systems (GNSS) receivers. We propose a statistical approach, Neyman-Pearson (NP) detection theory and generalized likelihood ratio test (GLRT), to obtain new detector which is able mitigate temporally uncorrelated interferences even if unstructured moderately uncalibrated. The key feature assumption arbitrary unknown covariance noise matrix, attempts capture behavior...
Taking the work conducted by Global Navigation Satellite System (GNSS) Software Defined Radio (SDR) working group during last decade as a seed, this contribution summarizes for first time history of GNSS SDR development. It highlights selected implementations and achievements that are available to public or influenced general The relation standardization process Intermediate Frequency (IF) sample data metadata is discussed, recent update Institute (ION) standard recapitulated. focuses on...
This paper presents the design, proof-of-concept implementation, and preliminary performance assessment of an affordable real-time High-Sensitivity (HS) Global Navigation Satellite System (GNSS) receiver. Specifically tailored to capture track weak Galileo E1b/c signals, this receiver aims support research endeavors focused on advancing GNSS signal processing algorithms, particularly in scenarios characterized by pronounced attenuation. Leveraging System-on-Chip Field-Programmable Gate Array...
This paper presents an open source implementation of a GNSS software receiver that targets Galileo E1B and E1C signals. After discussing the signal structure general architecture proposed receiver, we provide detailed descriptions main processing algorithms involved in acquisition tracking such navigation Experimental results with signals broadcast by in-orbit satellites validate approach. The connection to external (that allows in-the-loop testing implemented popular commercial tools) is...
This paper addresses the signal acquisition problem in presence of interferences using antenna arrays general framework Global Navigation Satellite Systems receivers. We describe and compare two different approaches: first one is based on generalized likelihood ratio test (GLRT) detector directly applied array snapshots, second uses a digital beamformer as spatial filter to mitigate acquire output. show that array-based GLRT equivalent conventional output time reference beamformer. The...
The aim of this paper is to provide guidelines for developing high-quality, well-written GNSS software receivers. systematic application design patterns and programming methodologies speeds up the development process by providing tested, proven paradigms, improved code readability coders, receiver architects, users. This includes unit testing all modules, use a style stressing language-specific conventions. All these good practices result in fewer bugs, reduce reinvention-of-the-wheel, cut...
For many applications in Intelligent Transport Systems (ITS), the position and heading information of vehicles Vulnerable Road Users (VRU) cannot generally rely on performance Global Navigation Satellite System (GNSS) as a standalone technology. Even with use precise positioning techniques augmentation systems for GNSS, such Space-based Augmentation (SBAS) or Differential-GNSS, its availability still depends signal propagation conditions (e.g. multipath, unintentional intentional (jamming)...
The fact that most of high-accuracy positioning and distributed timing services, including safety-critical operations, rely on Global Navigation Satellite Systems (GNSS) has raised the concern possible denial-of-service situations. Complementary to time- frequency-domain mitigation techniques, it is well known antenna-array based receivers can benefit from spatial domain processing effectively mitigate unintentional intentional Radio Frequency Interferences (RFIs). In this work, we propose a...
Cooperative-Intelligent Transport Systems (C-ITS) are one of the flagships new coming automotive and communication industries. Mobility needs to be safer more efficient C-ITS key for this era. On hand, organizations like ETSI, IEEE, SAE, 3GPP or ISO developing standards technologies protocols and, on other, manufacturers operators deploying testing their first pilots. In paper, we present a pilot developed by group stakeholders, in which vehicles will alert drivers potential collisions with...
Spoofing is a major threat of GNSS-based positioning. Early detection spoofing signals paramount in counteracting its malicious effects. In this article, pre-correlation method presented based on the solid theory hypothesis testing. The assumes that legitimate signal being tracked, and thus synchronization parameters are known, when appears. Two versions detector presented, one assuming both uncorrelated another, more general, without assumptions. former computationally lighter, although...
This paper discusses the reproducibility of scientific experiments in which global navigation satellite system (GNSS) signals play a role. After analyzing factors that impact an experiment given context, this proposes methodology that, leveraging on software containerization technologies and best practices from professional development, ensures automated reproduction involving GNSS data software-defined receivers, including generation figures or tables research publication, while fostering...
This paper presents a novel beamformlng approach for Interference mitigation in Global Navigation Satellite Systems (GNSS) receivers. The proposed algorithm is based on recently developed beamformer but adapted to GNSS particularities, mainly the extremely low power of received signal (well below noise floor) and interest only line-of-sight component, as opposite communication systems where multi-path can be exploited increase signal-to-noise ratio. new requires estimations spatial signature...
The aim of this paper is to trigger a conversation about the assessment, definition metrics and testing procedures software-defined GNSS receivers. While evaluation traditional (i.e., built on application-specific integrated circuit technology) receivers now well-understood, enjoys both solid industry providing required equipment universally agreed figures merit, particularities radio technologies claim for more comprehensive approach. In order account such multi-faceted nature, authors...
Global navigation satellite system (GNSS) technology is evolving at a rapid pace. The advancement demands prototyping tools to conduct research on new and innovative signals systems. However, researchers need deal with the increasing complexity integration level of GNSS integrated circuits (IC), resulting in limited access modify or inspect any internal aspect receiver. To address these limitations, authors designed low-cost System-on-Chip Field-Programmable Gate Array (SoC-FPGA)...
This paper addresses both the efficiency and portability of a computer program in charge baseband signal processing GNSS receiver. Efficiency, this context, refers to optimizing speed memory requirements software Specifically, interest is focused on how fast receiver can process incoming stream raw samples and, particular, if up position fix be executed real-time (and many channels host executing application sustain parallel). achieved by applying concept parallelization at different...
The Galileo E6 band operates at a nonprimary frequency within the L-band. This presents challenging situations in vicinity of other, legitimate, radiolocation services. is case for Air Traffic Control (ATC) radar, which seen as an in-band–pulsed interference by GNSS receiver. paper provides detailed study impact such interference, well localization approaches. Particularly, describes ATC jamming event captured on permanent station, its effects real receiver, and how it was tracked to...
The presence of unintentional or intentional Radio Frequency Interference (RFI) signals in the Global Navigation Satellite Systems (GNSS) frequency bands is by far one main vulnerabilities every GNSS receiver. This known threat can cause severe positioning performance degradation and even a complete service unavailability. Complementary to time frequency-domain mitigation techniques, it well that antenna-array based receivers benefit from spatial domain processing. By exploiting diversity,...
This paper characterizes, with static and roving GNSS receivers in the context of precision agriculture research, hybrid ionospheric-geodetic model Wide-Area Real-Time Kinematics (WARTK), which computes broadcasts real-time corrections for high-precision positioning navigation within sparse receiver networks. research is motivated by potential benefits low-cost precise WARTK technique on mass-market applications such as agriculture. The results from two experiments summarized this work,...
One of the more challenging propagation conditions in Global Navigation Satellite Systems (GNSS), clearly affecting high-precision receivers and safety critical applications, is ionospheric scintillation. main disadvantages standard phase tracking architectures estimation vs mitigation tradeoff, that is, it impossible to distinguish between line-of-sight (LOS) contribution interest variations induced by ionosphere. A possible solution consider a state-space formulation problem, where...