Systems and methods for providing anti-spoofing capability to a global navigation satellite system receiver

An apparatus comprising a first global navigation satellite system (GNSS) receiver, the apparatus comprising:

• a first acquisition and tracking circuit comprising at least a matched filter,
• the first acquisition and tracking circuit configured to track a plurality downconverted signals;
• a processor configured to determine:
• which of the plurality of downconverted signals are based on authentic GNSS signals, and
• which of the plurality of downconverted signals are based on spoofed GNSS signals;
• a beamformer at least partially controlled by the processor, wherein the beamformer is configured to generate a plurality of dithered antenna patterns;
• at least a second acquisition and tracking circuit configured to receive one or more groups of signals corresponding to the plurality of dithered antenna patterns;
• and
• GNSS signal replicators configured to generate replicas of authentic GNSS signals using timing settings used by at least the first acquisition and tracking circuit and the second acquisition and tracking circuit.

An apparatus comprising a first global navigation satellite system (GNSS) receiver, the apparatus comprising:

• a first acquisition and tracking circuit comprising at least a matched filter, the first acquisition and tracking circuit configured to track a plurality downconverted signals;
• a processor configured to determine:
• which of the plurality of downconverted signals are based on authentic GNSS signals, and
• which of the plurality of downconverted signals are based on spoofed GNSS signals;
• and
• a beamformer at least partially controlled by the processor, wherein the beamformer is configured to output a group of signals corresponding to a first antenna pattern, wherein the group of signals is provided as an input to the first acquisition and tracking circuit;
• and
• wherein the processor is configured to utilize the first acquisition and tracking circuit to determine whether a particular downconverted signal is based on an authentic GNSS signal or on a spoofed GNSS signal.

A method for providing anti-spoofing capability, the method comprising:

• acquiring and tracking multiple downconverted signals using a first acquisition and tracking circuit;
• determining:
• which of the multiple downconverted signals are based on authentic GNSS signals, and
• which of the multiple downconverted signals are based on spoofed GNSS signals;
• using a beamformer, generating at least:
• a first output with a first group of signals corresponding to a first dithered antenna pattern, and
• wherein the first group of signals is provided as an input to the first acquisition and tracking circuit;
• and
• using at least a second acquisition and tracking circuit to determine whether a particular downconverted signal is based on an authentic GNSS signal or on a spoofed GNSS signal.

A method for providing anti-spoofing capability from a first global navigation satellite system (GNSS) receiver to a second GNSS receiver, the method comprising:

• acquiring and tracking multiple downconverted signals using a first acquisition and tracking circuit;
• determining:
• which of the multiple downconverted signals are based on authentic GNSS signals, and
• which of the multiple downconverted signals are based on spoofed GNSS signals;
• wherein the GNSS comprises a global positioning system (GPS), and
• wherein the multiple downconverted signals comprise at least a first downconverted authentic signal and a second downconverted spoofed signal,
• independently tracking the first downconverted authentic signal and the second downconverted spoofed signal,
• wherein the first downconverted authentic signal and the second downconverted spoofed signal have different timing offsets.

A method for providing anti-spoofing capability from a first global navigation satellite system (GNSS) receiver to a second GNSS receiver, the method comprising:

• acquiring and tracking multiple downconverted signals;
• determining which of the multiple downconverted signals are based on authentic GNSS signals and which of the multiple downconverted signals are based on spoofed GNSS signals;
• using a beamformer, generating multiple outputs corresponding to multiple antenna patterns;
• receiving groups of signals corresponding to the multiple antenna patterns;
• and
• generating replicas of authentic GNSS signals based on timing settings used to acquire and track the multiple downconverted signals.

A method for providing anti-spoofing capability from a first global navigation satellite system (GNSS) receiver to a second GNSS receiver, the method comprising:

• acquiring and tracking multiple downconverted signals;
• determining which of the acquired multiple downconverted signals are based on authentic GNSS signals and which of the multiple downconverted signals are based on spoofed GNSS signals;
• generating replicas of authentic GNSS signals based on timing settings used in acquiring and tracking the multiple downconverted signals that are based on authentic GNSS signals;
• and
• using a beamformer, generating at least an output with a group of signals, wherein the output corresponds to a first antenna pattern, wherein the group of signals is provided as an input to the first group of acquisition and tracking functions, wherein the first group of acquisition and tracking functions are used by the processor to determine whether a particular downconverted signal is based on an authentic GNSS signal or on a spoofed GNSS signal.