Methods and apparatus for velocity detection in MIMO radar including velocity ambiguity resolution

A method comprising:

• receiving, by a receiver, chirps;
• estimating a phase shift (φd) in a virtual array vector S of signals based on the received chirps;
• correcting phases of each element of virtual array vector S using φd to generate a corrected virtual array vector Sc;
• performing a Fourier transform on the corrected virtual array vector Sc to generate a corrected virtual array spectrum;
• and
• analyzing the corrected virtual array spectrum to detect a signature that indicates that an object corresponding to the detected signature has an absolute velocity greater than a maximum velocity.

A radar system comprising:

• a receiver configured to receive chirps;
• a processor coupled to the receiver and configured to:
• estimate a phase shift (φd) in a virtual array vector S of signals based on the received chirps;
• correct phases of each element of virtual array vector S using φd to generate a corrected virtual array vector Sc;
• perform a Fourier transform on the corrected virtual array vector Sc to generate a corrected virtual array spectrum;
• and
• analyze the corrected virtual array spectrum to detect a signature that indicates that an object corresponding to the detected signature has an absolute velocity greater than a maximum velocity.