CPC G01S 7/354 (2013.01) [G01S 13/343 (2013.01); G01S 13/42 (2013.01); G01S 13/92 (2013.01); G01S 7/356 (2021.05)] | 20 Claims |
1. A circuit comprising:
a port adapted to be coupled to a receiver and configured to receive a plurality of chirps; and
a processor coupled to the port and configured to:
estimate a phase shift in a virtual array vector S of signals based on the plurality of chirps received by the port;
correct phases of each element of the virtual array vector S using the phase shift to generate a corrected virtual array vector Sc;
compute a correlation matrix for the corrected virtual array vector Sc;
compute a ratio of two eigenvalues of the correlation matrix;
compare the ratio to a threshold level; and
determine that more than one object is present in the corrected virtual array vector Sc in response to determining that the ratio is greater than the threshold level.
|