US 12,032,053 B2
Angle measuring device, angle measuring method, and in-vehicle device
Yu Shimizu, Tokyo (JP); Satoshi Kageme, Tokyo (JP); and Kei Suwa, Tokyo (JP)
Assigned to MITSUBISHI ELECTRIC CORPORATION, Tokyo (JP)
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
Filed on Jun. 28, 2021, as Appl. No. 17/360,201.
Application 17/360,201 is a continuation of application No. PCT/JP2019/003423, filed on Jan. 31, 2019.
Prior Publication US 2021/0325524 A1, Oct. 21, 2021
Int. Cl. G01S 13/44 (2006.01); G01S 7/41 (2006.01)
CPC G01S 13/44 (2013.01) [G01S 7/41 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An angle measuring device comprising:
processing circuitry performing a process of:
when a first beam is radiated from a first transmission antenna and a second beam is radiated from a second transmission antenna, the second beam having an elevation angle in a radiation direction of which is different from an elevation angle in a radiation direction of the first beam,
extracting a first signal that includes a first reflection wave and does not include a second reflection wave as a first demodulated signal and a second signal that includes the second reflection wave and does not include the first reflection wave as a second demodulated signal from reception signals output from one or more reception antennas among a plurality of reception antennas, wherein
each of the plurality of reception antennas is arranged between the first transmission antenna and the second transmission antenna, and
each of the plurality of reception antennas outputs a reception signal including the first reflection wave, which is the first beam reflected by a target, and the second reflection wave, which is the second beam reflected by the target;
calculating an elevation of the target by performing monopulse angle measurement using a sum signal of the first demodulated signal and the second demodulated signal and a difference signal between the first demodulated signal and the second demodulated signal; and
calculating an azimuth of the target using reception signals output from the plurality of reception antennas, wherein
an installation position of the second transmission antenna in an azimuth direction is different from an installation position of the first transmission antenna in the azimuth direction.