Dual antenna interference localization using phase difference measurements

A non-transitory computer-readable medium comprising instructions that, when executed by one or more processors, cause the one or more processors to perform operations for localizing an interference signal relative to a global navigation satellite system (GNSS) receiver, the operations comprising:

• collecting, at a first time, a first phase difference measurement using a first antenna and a second antenna of the GNSS receiver and a first angle measurement using an inertial sensor of the GNSS receiver;
• collecting, at a second time after the first time and after the GNSS receiver has been at least partially moved or rotated, a second phase difference measurement using the first antenna and the second antenna and a second angle measurement using the inertial sensor;
• computing an angle offset between the first angle measurement and second angle measurement;
• searching a phase difference map using the first phase difference measurement, the second phase difference measurement, and the angle offset to identify a compatible set of phase differences in the phase difference map, the phase difference map including a plurality of phase differences indexed by vertical and/or horizontal angles, wherein the compatible set of phase differences are separated in the phase difference map by the angle offset;
• and
• estimating, based on the compatible set of phase differences, an angle of arrival of the interference signal relative to the GNSS receiver.

A system comprising:

• one or more processors;
• and
• a computer-readable medium comprising instructions that, when executed by the one or more processors, cause the one or more processors to perform operations for localizing an interference signal relative to a global navigation satellite system (GNSS) receiver, the operations comprising:
• collecting, at a first time, a first phase difference measurement using a first antenna and a second antenna of the GNSS receiver and a first angle measurement using an inertial sensor of the GNSS receiver;
• collecting, at a second time after the first time and after the GNSS receiver has been at least partially moved or rotated, a second phase difference measurement using the first antenna and the second antenna and a second angle measurement using the inertial sensor;
• computing an angle offset between the first angle measurement and second angle measurement;
• searching a phase difference map using the first phase difference measurement, the second phase difference measurement, and the angle offset to identify a compatible set of phase differences in the phase difference map, the phase difference map including a plurality of phase differences indexed by vertical and/or horizontal angles, wherein the compatible set of phase differences are separated in the phase difference map by the angle offset;
• and
• estimating, based on the compatible set of phase differences, an angle of arrival of the interference signal relative to the GNSS receiver.