公开(公告)号：US20150049791A1

公开(公告)日：2015-02-19

申请号：US14290449

申请日：2014-05-29

Applicant: STMicroelectronics S.r.l.

Inventor： Domenico Di Grazia

IPC: G01S19/30 ,  H04B1/709 ,  H04B1/7075

CPC classification number: G01S19/30 ,  G01S19/24 ,  H04B1/7075 ,  H04B1/709

Abstract: Acquiring a satellite signal, by, receiving a CDMA-modulated signal; generating a plurality of CDMA-type test signals comprising a reference test signal having a first chip duration, and a plurality of test signals delayed/anticipated of a corresponding time offset from the respective test reference signal, less than the chip duration; calculating correlations between the CDMA-modulated signal and the plurality of test signals for obtaining a plurality of correlation results; selecting, based on the correlation results, acquisition parameters associated to a candidate satellite signal; acquiring or rejecting the acquisition parameters selected based on the correlation results.

Abstract translation: 通过接收CDMA调制信号来获取卫星信号; 产生多个CDMA型测试信号，该测试信号包括具有第一芯片持续时间的参考测试信号以及延迟/预期与相应测试参考信号相对应的时间偏移的多个测试信号，小于所述芯片持续时间; 计算CDMA调制信号和多个测试信号之间的相关性，以获得多个相关结果; 基于相关结果选择与候选卫星信号相关联的采集参数; 获取或拒绝基于相关结果选择的获取参数。

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：US09297905B2

公开(公告)日：2016-03-29

申请号：US13719798

申请日：2012-12-19

Applicant: STMicroelectronics S.r.l.

Inventor： Domenico Di Grazia

IPC: G01S19/29 ,  G01S19/30

CPC classification number: G01S19/30 ,  G01S19/29

Abstract: A method of acquiring a satellite signal includes providing a CDMA-modulated signal, defining a first search frequency interval and a first reception sensitivity, and performing a first acquisition of the modulated signal according to the first sensitivity and the first frequency interval in order to provide an acquisition or failed acquisition result. In case of a failed acquisition, performing a second acquisition of the modulated signal as a function of a second search frequency interval, narrower than the first frequency interval, and a second reception sensitivity, greater than the first sensitivity and depending on a power of a side lobe of the modulated signal.

Abstract translation: 获取卫星信号的方法包括提供定义第一搜索频率间隔和第一接收灵敏度的CDMA调制信号，以及根据第一灵敏度和第一频率间隔执行调制信号的第一次采集，以便提供 收购或失败的收购结果。 在失败的获取的情况下，执行调制信号的第二次获取作为比第一频率间隔窄的第二搜索频率间隔的函数，以及大于第一灵敏度的第二接收灵敏度，并且取决于 调制信号的旁瓣。

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.

公开(公告)号：US09008155B2

公开(公告)日：2015-04-14

申请号：US14290449

申请日：2014-05-29

Applicant: STMicroelectronics S.r.l.

Inventor： Domenico Di Grazia

IPC: H04B1/00 ,  G01S19/30 ,  H04B1/7075 ,  H04B1/709

CPC classification number: G01S19/30 ,  G01S19/24 ,  H04B1/7075 ,  H04B1/709

Abstract: Acquiring a satellite signal, by, receiving a CDMA-modulated signal; generating a plurality of CDMA-type test signals comprising a reference test signal having a first chip duration, and a plurality of test signals delayed/anticipated of a corresponding time offset from the respective test reference signal, less than the chip duration; calculating correlations between the CDMA-modulated signal and the plurality of test signals for obtaining a plurality of correlation results; selecting, based on the correlation results, acquisition parameters associated to a candidate satellite signal; acquiring or rejecting the acquisition parameters selected based on the correlation results.

Abstract translation: 通过接收CDMA调制信号来获取卫星信号; 产生多个CDMA型测试信号，该测试信号包括具有第一芯片持续时间的参考测试信号以及延迟/预期与相应测试参考信号相对应的时间偏移的多个测试信号，小于所述芯片持续时间; 计算CDMA调制信号和多个测试信号之间的相关性，以获得多个相关结果; 基于相关结果选择与候选卫星信号相关联的采集参数; 获取或拒绝基于相关结果选择的获取参数。

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：US20130169480A1

公开(公告)日：2013-07-04

申请号：US13719798

申请日：2012-12-19

Applicant: STMicroelectronics S.r.l.

Inventor： Domenico Di Grazia

IPC: G01S19/30

CPC classification number: G01S19/30 ,  G01S19/29

Abstract: A method of acquiring a satellite signal includes providing a CDMA-modulated signal, defining a first search frequency interval and a first reception sensitivity, and performing a first acquisition of the modulated signal according to the first sensitivity and the first frequency interval in order to provide an acquisition or failed acquisition result. In case of a failed acquisition, performing a second acquisition of the modulated signal as a function of a second search frequency interval, narrower than the first frequency interval, and a second reception sensitivity, greater than the first sensitivity and depending on a power of a side lobe of the modulated signal.

Abstract translation: 获取卫星信号的方法包括提供定义第一搜索频率间隔和第一接收灵敏度的CDMA调制信号，以及根据第一灵敏度和第一频率间隔执行调制信号的第一次采集，以便提供 收购或失败的收购结果。 在失败的获取的情况下，执行调制信号的第二次获取作为比第一频率间隔窄的第二搜索频率间隔的函数，以及大于第一灵敏度的第二接收灵敏度，并且取决于 调制信号的旁瓣。