Systems and methods for localizing a radar sensor

A computer-implemented method of localizing a radar sensor, the method comprising:

• obtaining a first radar scan of a first environment of the radar sensor, wherein the first radar scan comprises a set of power-range spectra, including a first power-range spectrum;
• extracting a first set of landmarks, including a first landmark, from the first radar scan, wherein the first landmark is defined by a range and an azimuth;
• computing a respective first set of descriptors, including a first descriptor, of the first set of landmarks, wherein the first descriptor defines the first landmark by respective relative ranges and azimuths in relation to at least one landmark included in the first set of landmarks;
• accessing at least one reference set of landmarks of respective environments and computing at least one respective reference set of descriptors, where each of the at least one respective reference set of descriptors corresponds to one of the at least one reference set of landmarks;
• matching the first set of descriptors to a corresponding first reference set of descriptors from the at least one respective reference set of descriptors;
• and
• localizing a first location of the radar sensor using a first result of the matching;
• wherein the method further comprises:
• projecting the first descriptor to a first projected descriptor, wherein the first descriptor has a dimensionality N and the first projected descriptor has a dimensionality M, wherein M≠N;
• and
• wherein matching the first set of descriptors to the corresponding first reference set of descriptors comprises matching a first set of projected descriptors, including the first projected descriptor, to the corresponding first reference set of descriptors.