Patent ID: 11921201
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 6:
7. A signal processing method comprising:
transmitting a transmission wave a position of which changes in a first direction and which spreads in a second direction orthogonal to the first direction;
acquiring observation data received;
generating a matrix of the observation data in the first direction and the second direction, as a reception signal matrix, with a value of a position in the reception signal matrix depending on a signal strength;
specifying a range in the first direction in an imaging matrix;
setting a sparse vector including a second component of the specified range, the imaging matrix having a number of divisions in the first direction of the imaging matrix greater than a number of divisions in the first direction of the reception signal matrix, and the imaging matrix having a same number of divisions in the second direction as the reception signal matrix;
performing reconstruction processing using the reception signal matrix and the sparse vector to calculate a component of the sparse vector; and
synthesizing the sparse vector being a result of the range processing and the reconstruction processing while moving the range, to generate the imaging matrix.