US 11,733,350 B2
Object identification apparatus, object identification method, and object identification program
Daisuke Matsuo, Tokyo (JP); Akihiko Sugiyama, Tokyo (JP); Kazumine Ogura, Tokyo (JP); Shingo Yamanouchi, Tokyo (JP); and Masayuki Ariyoshi, Tokyo (JP)
Assigned to NEC CORPORATION, Tokyo (JP)
Appl. No. 16/963,971
Filed by NEC Corporation, Tokyo (JP)
PCT Filed Jan. 25, 2018, PCT No. PCT/JP2018/002360
§ 371(c)(1), (2) Date Jul. 22, 2020,
PCT Pub. No. WO2019/146055, PCT Pub. Date Aug. 1, 2019.
Prior Publication US 2021/0041532 A1, Feb. 11, 2021
Int. Cl. G01S 7/41 (2006.01); G01S 13/524 (2006.01); G01S 13/52 (2006.01); G01S 13/36 (2006.01)
CPC G01S 7/412 (2013.01) [G01S 13/524 (2013.01); G01S 13/36 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An object identification apparatus comprising:
a phase difference calculator that calculates phase difference information between a transmission signal and a reception signal obtained by reflecting, by surfaces of a moving object and a stationary object in a space, the transmission signal emitted to the space and receiving the reflected transmission signal;
a distance calculator that calculates distance information using the phase difference information;
a distance information separator that separates the distance information into moving object distance information as distance information about the moving object and stationary object distance information as distance information about the stationary object; and
an identifier that identifies the stationary object and the moving object based on the stationary object distance information and the moving object distance information, wherein
said phase difference calculator receives the reception signal at each of a plurality of reception positions, and calculates, as a plurality of pieces of phase difference information, pieces of phase difference information respectively corresponding to combinations of the transmission signal and the plurality of reception signals,
said distance calculator obtains pieces of distance information with respect to a plurality of directions using the plurality of pieces of phase difference information, and
said distance information separator separates the pieces of distance information with respect to the plurality of directions into pieces of moving object distance information with respect to the plurality of directions and pieces of stationary object distance information with respect to the plurality of directions, respectively.