US 12,253,578 B2
Signal vector derivation apparatus, method, program, and recording medium
Yuji Ogata, Miyagi (JP); and Tomonori Yanagida, Miyagi (JP)
Assigned to ADVANTEST CORPORATION, Tokyo (JP)
Appl. No. 18/272,888
Filed by ADVANTEST CORPORATION, Tokyo (JP)
PCT Filed Mar. 7, 2022, PCT No. PCT/JP2022/009613
§ 371(c)(1), (2) Date Jul. 18, 2023,
PCT Pub. No. WO2022/230365, PCT Pub. Date Nov. 3, 2022.
Claims priority of application No. 2021-074991 (JP), filed on Apr. 27, 2021.
Prior Publication US 2024/0094311 A1, Mar. 21, 2024
Int. Cl. G01R 33/02 (2006.01)
CPC G01R 33/0206 (2013.01) 15 Claims
OG exemplary drawing
 
1. A signal vector derivation apparatus for receiving measurement results from a plurality of sensors that receive signals each represented by a vector having a predetermined direction and measure triaxial components orthogonal to each other and for deriving the direction of the vector, the measurement results from the sensors each proportional to a sum of the triaxial components of the vector multiplied, respectively, by first coefficients, the signal vector derivation apparatus, comprising:
a spectrum deriving section arranged to derive a spectrum obtained based on the measurement results from the sensors and a sum of the first coefficients multiplied, respectively, by second coefficients, the spectrum having local maximum values within voxels in which signal sources that output the respective signals exist; and
a direction deriving section arranged to derive the direction of the vector based on the second coefficients used to obtain the spectrum.