US 12,461,236 B2
Electronic device, method for controlling electronic device, and program
Jun Kuroda, Kodaira (JP); Tooru Sahara, Yokohama (JP); Fangwei Tong, Machida (JP); and Takuya Homma, Yokohama (JP)
Assigned to KYOCERA Corporation, Kyoto (JP)
Appl. No. 18/004,177
Filed by KYOCERA Corporation, Kyoto (JP)
PCT Filed Jul. 6, 2021, PCT No. PCT/JP2021/025517
§ 371(c)(1), (2) Date Jan. 3, 2023,
PCT Pub. No. WO2022/024690, PCT Pub. Date Feb. 3, 2022.
Claims priority of application No. 2020-128614 (JP), filed on Jul. 29, 2020.
Prior Publication US 2023/0288557 A1, Sep. 14, 2023
Int. Cl. G01S 15/42 (2006.01); G01S 13/42 (2006.01)
CPC G01S 15/42 (2013.01) [G01S 13/42 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An electronic device comprising:
a transmission antenna configured to transmit a transmission wave;
a plurality of reception antennas configured to receive a reflected wave that is the transmission wave having been reflected; and
a signal processing unit configured to detect an object with a subspace method, based on a transmission signal transmitted as the transmission wave and a reception signal received as the reflected wave, wherein
the signal processing unit is configured to estimate a direction of arrival of the reflected wave, based on solutions of an algebraic equation Root-MUSIC Polynomial (hereinafter referred to as “RMP solutions”) in a Root-MUSIC method that satisfy a first requirement and a second requirement in terms of positions of the RMP solutions in a complex plane,
the first requirement being a requirement related to a distance between a unit circle and each of the RMP solutions in the complex plane,
the second requirement being a requirement related to a distance or an argument between at least two adjacent RMP solutions among the RMP solutions in the complex plane, and the second requirement is determined by calculating a difference between norms of the at least two adjacent RMP solutions or by calculating a difference between arguments of the at least two adjacent RMP solutions.