Micaela Troglia Gamba

Istituto Superiore Mario Boella (ISMB) | ISMB · Research Division of Navigation Technologies (NavSAS)

Many GNSS applications have been experiencing some constantly growing needs in terms of security and reliability. To address some of them, both GPS and Galileo are proposing evolutions of their legacy civil signals, embedding features of authentication. This paper focuses on the Galileo Open Signal Navigation Message Authentication (OSNMA) and desc...

Navigation Satellite Systems is a cross cutting technology that is used in many fields of modern life. Precise determination of position, velocity and time is particularly important in road applications and related technological solutions, which enable considerable improvements in traffic management and monitoring. In Vietnam, public transport vehi...

With the fast growing diffusion of the real-time high accuracy applications based on the Global Navigation Satellite System (GNSS), the robustness of the GNSS receiver performance has become a compelling requirement. Disruptive effects can be induced to the signal processing stages of GNSS receivers due to the disturbances from Radio-Frequency Inte...

Adaptive notch filters (ANFs) have been widely investigated in literature for their low complexity and good performance, and used in many signal processing applications. More recently, they have been proven to be an effective solution against jamming interferences, considered more than ever a real threat to Global Navigation Satellite System signal...

This paper proposes an optimization of the characteristic parameters that define four architectures of adaptive notch filters, used to mitigate the effect of swept-frequency (chirp) jamming signals at the input of a GNSS receiver. The optimization is based on a performance metric computed at the acquisition stage of the receiver that represents a m...

In the past years, many techniques have been researched and developed to detect and identify the interference sources of Global Navigation Satellite System (GNSS) signals. In this paper, we utilize a simple and portable application to map interference sources in real-time. The results are promising and show the potential of the crowdsourcing for mo...

The hazardous effects of spoofing attacks on the global navigation satellite system (GNSS) receiver are well known. Technologies and algorithms to increase the awareness of GNSS receivers against such attacks become more important and necessary. We present the validation of two statistical spoofing detection methods, namely the Chi-square goodness...

Due to the low level of the received power and to the known signal structure, Global Navigation Satellite Systems (GNSS) civil signals might be vulnerable to different sources of interference. Among them, the spoofing attacks are considered ones of the most deceptive, since their scope is controlling the output of the victim receiver. This paper pr...

Global Navigation Satellite Systems (GNSS) broadcast signals for positioning and navigation, which can be also employed for remote sensing applications. Indeed, the satellites of any GNSS can be seen as synchronized sources of electromagnetic radiation, and specific processing of the signals reflected back from the ground can be used to estimate th...

Nowadays, Unmanned Aerial Vehicles (UAVs) platform are widely employed in a broad range of applications: from environmental monitoring and precise agriculture to humanitarian localization and rescue and prevention of events such as floods, fires, landslides. On the other hand, Global Navigation Satellite System Reflectometry (GNSS-R) is an emerging...

GNSS receivers take advantage from the software defined radio approach because they can use the intrinsic flexibility to evolve toward new satellite positioning systems and applications. For this type of implementation the use of embedded platforms is particularly interesting, due to the associated portability and low cost. This paper describes the...

The GNSS signals can be exploited for remote sensing purposes. In the past decade, lots of experiments have been conducted in the field of GNSS reflectometry, with the focus on the estimate of different parameters. Different methods have been presented to analyze the estimation errors, but a comprehensive analysis is still not trivial. In [1], as i...

In modern communications, the flexibility is a key point in the implementation of receivers because it eases the development of new products and the introduction of new features in already existing ones. In the silicon-based products the extra-cost associated to the introduction of a new functionality is mainly due to the development process rather...

This paper presents the theoretical development and analysis of a novel DLL discriminator robust to multipath errors, called the Combination of Squared Correlators (CSC). The CSC discriminator features a simple implementation based on four (complex) static correlators per channel, without falling into the wide family of patented architectures.In th...

The hazardous effect of a spoofing attack to a Global Navigation Satellite System (GNSS) receiver is well known. This is particularly dangerous for safety critical applications, such as in the aeronautical and maritime fields, with a potential cascade of detrimental effects on the on-board equipment. This paper presents the validation of two statis...

The Software Defined Radio (SDR) technology, applied to the reception of Global Navigation Satellite Signals (GNSS), allows the implementation of a positioning device with a high flexibility level. The advantage is twofold: not only the GNSS SDR receiver can be easily updated during its operational life, but it becomes an outstanding tool in protot...

In this paper the preliminary design of a Global Navigation Satellite System (GNSS) receiver with scatterometric capabilities is presented. The aim is to exploit the reflected GNSS signals to retrieve information about the soil characteristics. The receiver prototype is specifically designed to be small and lightweight, to be mounted on board an Un...

In recent years, research activities in the field of Satellite Navigation have boosted worldwide. At the same time, it has become evident that few educational opportunities in the field were available for students and there was a need to develop dedicated tools for hands-on sessions. To partially answer this need, the NavSAS Group has developed N-F...

The disruptive effect of the interference in Global Navigation Satellite System (GNSS) receivers is well known. Jammers and spoofing attacks, in addition to time-varying environment effects, such as fading and multipath, can induce distortions on the correlation function resulting in a degraded positioning accuracy. Furthermore, improved performanc...

The extremely low power of Global Navigation Satellite System (GNSS) signals makes them vulnerable to disturbances and interference from external sources. These induce distortions on the correlation function that reflect upon a degraded pseudoranges measurement and poor positioning accuracy. On the other hand, the wide spread use of GNSS receivers...

Multiple Input Multiple Output (MIMO) systems are recognized as a key enabling technology in high performance wireless communications. However the complexity of high throughput MIMO detectors poses a serious implementation issue. Among known MIMO detectors, Sphere Decoder Algorithm (SDA) has emerged to reduce the processing complexity, with respect...

In the field of satellite navigation technologies, and in particular for Safety-of-Life (SoL) applications, great attention is given to rejection of interference. In particular, continuous wave (CW) signals represent one of the most common types of interference. A properly designed adaptive notch filter should be employed in order to remove it. Suc...

The disruptive effects of multipath around the receiver antenna are well known and proved by a very wide GNSS literature. In addition, multipath robustness is one of the first signal characteristics taken into account in the process of signals definition. The rejection of the multipath effects becomes an even more sensitive issue in Safety-of-Life...

Multiple-input-multiple-output (MIMO) systems are recognised as a key enabling technology in high-performance wireless communications; however, the implementation of high-throughput MIMO detectors still is a critical task. Among known MIMO detectors, sphere decoder algorithm (SDA) is capable of optimal performance with acceptable processing complex...

Iterative Soft-Input Soft-Output (SISO) detection and channel decoding offer significant improvement in error-rate performance for a reduced signal-to-noise ratio. With Multiple-Input Multiple-Output (MIMO) technology being part of many wireless system standards, several low-complexity suboptimal detection algorithms have been proposed. In this pap...

Multiple input multiple output (MIMO) systems are recognized as a key enabling technology in high performance wireless communications. Among known MIMO detectors, the sphere decoding algorithm (SDA) is capable of optimal performance with a reduced computational complexity, compared to a maximum likelihood (ML) detector. However the hardware impleme...