Publications de Aleksandar Jovanovic

Advanced Tracking Algorithm Designs for New Galileo Signals and Security Protection and Mitigation

EPFL2014

Multi-test Detection and Protection Algorithm Against Spoofing Attacks on GNSS Receivers

Pierre-André Farine, Aleksandar Jovanovic, Cyril Botteron

The vulnerability against interference, spoofing, and jamming of GNSS receivers is considered nowadays a major security concern. This security threat is exacerbated with the existing market availability of GPS jamming and spoofing equipment sold at reasona ...

2014

Method to secure gnss based locations in a device having gnss receiver

Aleksandar Jovanovic, Panagiotis Papadimitratos

A method to detect at a GNSS receiver whether the received GNSS signals and navigation messages are the product of an attack. If there is evidence, as provided by the method described here, that the received signals and messages originate from adversarial ...

2012

Two-Step Galileo E1 CBOC Tracking Algorithm:When Reliability and Robustness Are Keys!

Pierre-André Farine, Aleksandar Jovanovic, Cyril Botteron

The majority of 3G mobile phones have an integrated GPS chip enabling them to calculate a navigation solution. But to deliver continuous and accurate location information, the satellite tracking process has to be stable and reliable. This is still challeng ...

2012

Dual Channel Optimization of Tracking Schemes for E1 CBOC Signal

Pierre-André Farine, Aleksandar Jovanovic, Youssef Tawk, Cyril Botteron

New generation of satellite navigation signals, such as AltBOC (Alternative Binary Offset Keying), CBOC (Composite Binary Offset Keying) and TMBOC (Time Multiplex Binary Offset Keying) bring enhancements in the tracking process, such as more signal power, ...

IEEE2011

Analysis of Galileo E5 and E5ab code tracking

Pierre-André Farine, Aleksandar Jovanovic, Youssef Tawk, Cyril Botteron

The world of global navigation satellite systems has been enhanced with several new or improved signals in space aiming to optimize accuracy, reliability, navigation solution, and interoperability between different constellations. However, such development ...

Springer-Verlag2011

A New FFT-Based Algorithm for Secondary Code Acquisition for Galileo Signals

Pierre-André Farine, Aleksandar Jovanovic, Youssef Tawk, Cyril Botteron, Jérôme Leclère

The innovative spreading codes used to modulate the new Galileo signals creates new challenges for receiver designers. It is well known in GNSS systems that longer integration times are needed to obtain a better sensitivity. However, the existence of the n ...

IEEE2011

Implementation and Optimization of a Galileo E1 Two-Step Tracking Algorithm using Data/Pilot Combining and Extended Integration Time

Pierre-André Farine, Aleksandar Jovanovic, Youssef Tawk, Cyril Botteron

This paper brings additional light on the previously proposed two-step tracking algorithm for E1 CBOC tracking. More specifically, assessment of the different DLL and PLL tracking loop architectures are analyzed, taking into consideration coherent and non- ...

Inst Navigation2011

Multipath Mitigation Techniques for CBOC, TMBOC and AltBOC Signals using Advanced Correlators Architectures

Pierre-André Farine, Aleksandar Jovanovic, Youssef Tawk, Cyril Botteron

Multipath mitigation in urban canyons and indoor environments is an open issue for the reception of GNSS signals for high precision applications, as the presence of multipath components can lead to signal fading and ranging errors. New families of navigati ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2010

Acquisition Performance of Galileo E5a Signal

Pierre-André Farine, Aleksandar Jovanovic, Youssef Tawk, Cyril Botteron

The introduction of new modulations on the global navigation satellite systems brings potential improvements for ground positioning. Clever receiver designs taking advantage of the characteristics of the new signals will be able to achieve better accuracy, ...

2010

Universal-SBAS: A worldwide multimodal standard

Pierre-André Farine, Aleksandar Jovanovic, Youssef Tawk, Cyril Botteron

This paper describes a generalisation of the aeronautical GNSS Space Based Augmentation System (SBAS) air interface, in a true worldwide multimodal standard named Universal S-BAS. Examples of usages of this multifrequency future standard are presented in t ...

2010

Requirements and Analysis for a Robust E1 Galileo Tracking Algorithm in the Scope of the GAMMA-A Project

Pierre-André Farine, Aleksandar Jovanovic, Youssef Tawk, Cyril Botteron

FP7 GAMMA-A project is a European project with the objective to develop a 3-frequency GPS/Galileo receiver concept for automotive mass-market applications. This receiver shall build on the excellent properties of the new and modernized wide-band Galileo an ...

Inst Navigation, 815 15Th Th St Nw, Ste 832, Washington, Dc 20005 Usa2010

Performance Comparison of Different Correlation Techniques for the AltBOC Modulation in Multipath Environments

Pierre-André Farine, Aleksandar Jovanovic, Youssef Tawk, Cyril Botteron

In this paper, different correlation techniques (narrow correlator, double delta correlator and subcarrier processing) that can be applied to the new Galileo alternate binary offset carrier AltBOC(15,10) modulation are discussed with respect to their funct ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2010

Implementation and Robustness Analysis of the Two-Step CBOC Tracking Algorithm in the scope of the GAMMA-A Project

Pierre-André Farine, Aleksandar Jovanovic, Youssef Tawk, Cyril Botteron

Numerous mobile applications and services require that devices are aware of their location. Global Navigation Satellite Systems (GNSS) are the predominant enabling technology. But in order to deliver continuous and accurate location information provided by ...

2010

Forward Error Correction for Multipath Media Streaming

Pascal Frossard, Dan Jurca, Aleksandar Jovanovic

We address the problem of joint optimal rate allocation and scheduling between media source rate and error protection rate in scalable streaming applications over lossy multipath networks. Starting from a distortion representation of the received media inf ...

Institute of Electrical and Electronics Engineers2009

Contribution to the Worldwide multimodal SBAS standard

Pierre-André Farine, Aleksandar Jovanovic, Youssef Tawk, Cyril Botteron

Several studies have been done or have been started in order to extend the current aeronautical Space Based Augmentation System (SBAS) DO-229D Minimum Operational Performance Specification (MOPS) SBAS standard mainly defined by the Radio Technical ComiteeC ...

2009

Analysis and Performance of Tracking Schemes for the Galileo MBOC signal

Pierre-André Farine, Aleksandar Jovanovic, Cyril Botteron

2009

Global Navigation Satellite Systems (GNSS) - Attacks and Countermeasures

Aleksandar Jovanovic, Panagiotis Papadimitratos

Increasing numbers of mobile computing devices, user-portable, or embedded in vehicles, cargo containers, or the physical space, need to be aware of their location in order to provide a wide range of commercial services. Most often, mobile devices obtain t ...

2008

Protection and Fundamental Vulnerability of Global Navigation Satellite Systems (GNSS)

Aleksandar Jovanovic, Panagiotis Papadimitratos

An increasing number of mobile applications and services require that devices are aware of their location. Global navigation satellite systems (GNSS) are the predominant enabling technology. But location information provided by commercial GNSS is not secur ...

2008