公开(公告)号：US20210364644A1

公开(公告)日：2021-11-25

申请号：US17313434

申请日：2021-05-06

Applicant: STMicroelectronics S.r.l.

Inventor： Domenico Di Grazia ,  Fabio Pisoni

IPC: G01S19/21 ,  G01S19/01

Abstract: An embodiment method comprises receiving a satellite signal in a tracking channel, generating a set of replicas of a pseudo random noise sequence, comprising a punctual replica and a plurality of replicas that are different in time with respect to the punctual replica over a given time spacing, correlating the received signal with each replica to obtain amplitude correlation values, monitoring the tracking channel to detect a spoofed signal by generating a further plurality of replicas of the pseudo random noise sequence having a respective time spacing greater than the given time spacing, correlating the received signal of the tracking channel with each further replica to obtain further amplitude correlation values, calculating a shape anomaly factor based on the further correlation amplitude values, verifying the shape anomaly factor is greater than a given shape anomaly threshold, and signaling detection of a spoofed signal on the tracking channel.

公开(公告)号：US10802156B2

公开(公告)日：2020-10-13

申请号：US15980221

申请日：2018-05-15

Applicant: STMicroelectronics S.r.l.

Inventor： Domenico Digrazia ,  Fabio Pisoni

IPC: G01S19/23 ,  G01S19/29

Abstract: A Global Navigation Satellite System (GNSS) receiver includes a Temperature Compensated Crystal Oscillator (TCCO) circuit. A micro jump of the TCCO circuit is detected by monitoring wide band phase values and carrier to noise ratio estimate values for each tracking channel of the tracking modules for the GNSS receiver. In response to a detected micro-jump, a frequency correction is calculated and applied to numerically controlled oscillators of phase/frequency lock loop circuits within tracking modules.

公开(公告)号：US11640003B2

公开(公告)日：2023-05-02

申请号：US17313434

申请日：2021-05-06

Applicant: STMicroelectronics S.r.l.

Inventor： Domenico Di Grazia ,  Fabio Pisoni

IPC: G01S19/21 ,  G01S19/37 ,  H04K3/00

Abstract: An embodiment method comprises receiving a satellite signal in a tracking channel, generating a set of replicas of a pseudo random noise sequence, comprising a punctual replica and a plurality of replicas that are different in time with respect to the punctual replica over a given time spacing, correlating the received signal with each replica to obtain amplitude correlation values, monitoring the tracking channel to detect a spoofed signal by generating a further plurality of replicas of the pseudo random noise sequence having a respective time spacing greater than the given time spacing, correlating the received signal of the tracking channel with each further replica to obtain further amplitude correlation values, calculating a shape anomaly factor based on the further correlation amplitude values, verifying the shape anomaly factor is greater than a given shape anomaly threshold, and signaling detection of a spoofed signal on the tracking channel.

公开(公告)号：US12222426B2

公开(公告)日：2025-02-11

申请号：US17953869

申请日：2022-09-27

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Domenico Di Grazia ,  Fabio Pisoni

IPC: G01S19/21

Abstract: A satellite tracking channel has a frequency loop tracking a carrier frequency of a satellite signal. A first indication of a spoofed signals is generated based on a determined satellite signal noise floor value associated with the satellite tracking channel and a tracking channel signal noise threshold associated with the satellite tracking channel. A second indication of a spoofed signal is generated based on a determining satellite tracking phase noise associated with the satellite tracking channel and a tracking channel phase noise threshold associated with the satellite tracking channel. Reception of a spoofed signal on the satellite tracking channel is detected based on the generated first indication of a spoofed signal and the generated second indication of the spoofed signal.