Vehicle multi-radar relative phase interferometry alignment systems and methods

A method for alignment of a plurality of radar devices of a vehicle, the method comprising:

• providing a plurality of alignment devices configured to transmit or reflect radar waves towards the vehicle for receipt by the plurality of radar devices;
• commanding, by a controller, one of the plurality of alignment devices to perform a base alignment routine of one of the plurality of radar devices to obtain a base alignment;
• receiving, by the controller via the plurality of radar devices, reflected radar waves;
• determining, by the controller, actual phase differences between the reflected radar waves;
• and
• based on the determined actual phase differences between the reflected radar waves, the base alignment, and predetermined alignments of a remainder of the plurality of radar devices, generating and outputting, by the controller, instructions for adjusting the alignment of at least some of the remainder of the plurality of radar devices.