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Due to the large amount of different new applications based on GNSS systems, the issue of interference monitoring is becoming an increasing concern in the satellite navigation community. Threats for GNSS can be classified as unintentional interference, jamming and spoofing. Among them, spoofing is more deceitful because the target receiver might not be able to detect the attack and consequently generate...
In this paper, the difference in performance between using a matched filter and an integrate and dump filter to implement a correlator in a GPS receiver is studied; in case of infinite and of limited bandwidth; and in case of infinite and of finite sampling frequency. Obviously, the matched filter outperforms the much easier to implement integrate and dump filter on accuracy of synchronization and...
“Peers-based aiding GNSS” refers to collaborative systems composed by GNSS receivers that exchange aiding data in order to improve their performance. One of the main issues related to this type of systems is the time synchronization between receivers. The required precision of the synchronization depends on the type of data the receivers exchange. This paper presents a new technique devoted to solve...
It was shown that the Vector Delay Lock Loop (VDLL) enhances the robustness of a GNSS receiver by exploiting the spatial correlation of the received signals. But due to the periodicity of the carrier, the VDLL only operates on the codephase and the carrier-frequency. In contrast to the VDLL, the Joint Tracking receiver manages to sustain the carrier-phase lock even in fast-changing, difficult environments...
This paper proposes a joint acquisition strategy of Global Navigation Satellite Systems (GNSS) satellites to reduce the number of correlations required in the acquisition process. The proposed method generates a local satellite signal replica, which contains the sum of two or more satellite codes, and performs a grid search with this augmented local replica. The grid is then analyzed with a test statistic...
The MBOC Galileo Reference Receiver is a newly designed prototype for GNSSs SIS demodulation on E5, E6 and L1 bands. The receiver, with more than one-hundred channels, is developed in a modular and reconfigurable fashion and is targeted to upgraded Ground Reference Stations. New features include specific processing of MBOC modulations and a novel proprietary technique for Giove PRS tracking. The receiver...
The aim of this paper is to present an acquisition strategy for Global Navigation Satellite System (GNSS) signals exploiting aiding information provided by GNSS receivers in a Peer-to-Peer (P2P) positioning system. This work sheds light on the benefits of sharing information regarding the received satellite signal power: the Carrier-to-Noise density ratio (C/N0) estimated by aiding peers relatively...
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