US 12,422,538 B2
Efficient direction of arrival estimation using low rank approximation
Noam Arkind, Givatayim (IL)
Assigned to Arbe Robotics Ltd., (IL)
Appl. No. 18/030,277
Filed by Arbe Robotics Ltd., Tel Aviv (IL)
PCT Filed Nov. 9, 2021, PCT No. PCT/IL2021/051332
§ 371(c)(1), (2) Date Apr. 5, 2023,
PCT Pub. No. WO2022/097158, PCT Pub. Date May 12, 2022.
Claims priority of application No. 278587 (IL), filed on Nov. 9, 2020.
Prior Publication US 2023/0375690 A1, Nov. 23, 2023
Int. Cl. G01S 13/42 (2006.01); G01S 7/35 (2006.01); G01S 13/931 (2020.01)
CPC G01S 13/42 (2013.01) [G01S 7/356 (2021.05); G01S 13/931 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method of estimating direction of arrival (DOA) of a signal for use in a radar system, comprising:
receiving an antenna array response vector as input data;
element wise multiplying the input data by a number of sets of pre-coefficients to yield a first plurality of results;
performing a plurality of fast Fourier transform (FFT) operations on said plurality of first results to generate a second plurality of results, wherein said FFT operations are performed in a spatial domain over a channel space of the antenna array response;
element wise multiplying said second plurality of results by said number of sets of post-coefficients to yield a third plurality of results;
summing said third plurality of results to yield an approximate DOA estimation; and
wherein said number is a rank of said approximation.