Human Detection and Identification in a Setting Using Millimiter-Wave Radar

A system comprising:

• a processor configured to be coupled to a millimeter-wave radar sensor circuit, the processor configured to:
• receive from the millimeter-wave radar sensor circuit a first set of data and a second set of data;
• identify first initial targets based on the first set of data;
• select a first angle based on the first set of data;
• perform a Fractional Fourier Transform (FrFT) on the first set of data based on the first initial targets using the first angle;
• identify first targets by comparing peaks of the FrFT of the first set of data with a first threshold;
• select a second angle based on the second set of data, wherein the second angle is different from the first angle;
• identify second initial targets based on the second set of data;
• perform a FrFT on the second set of data based on the second initial targets using the second angle;
• identify second targets by comparing peaks of the FrFT of the second set of data with the first threshold;
• track identified targets based on the identified first and second targets;
• and
• compare the tracked identified targets with reference track signatures to detect humans.

A millimeter-wave radar comprising:

• a millimeter-wave radar sensor circuit configured to:
• continuously transmit a plurality of chirps towards objects of a scene to produce echo signals,
• receive a first echo signal using the millimeter-wave radar to produce a first set of data, and
• after receiving the first echo signal, receive a second echo signal to produce a second set of data;
• and
• a processor configured to:
• select a first angle based on the first set of data,
• perform a Fractional Fourier Transform (FrFT) on the first set of data using the first angle,
• identify first targets by comparing peaks of the FrFT of the first set of data with a first threshold,
• select a second angle based on the second set of data, wherein the second angle is different from the first angle,
• perform a FrFT on the second set of data using the second angle,
• identify second targets by comparing peaks of the FrFT of the second set of data with the first threshold,
• track identified targets based on the identified first and second targets, and
• compare the tracked identified targets with reference track signatures to detect humans.