Patent ID: 11892535
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  Y | IPC G

Claim 0:
1. A signal processing apparatus configured to perform signal processing on a Doppler spectrum derived from a reception signal of a reflected wave of pulsed transmission waves repeatedly transmitted into a space, the signal processing apparatus comprising circuitry configured as:
a topographic echo estimator to estimate a topographic echo from the Doppler spectrum;
a candidate point extractor to extract a plurality of adjacent candidate points of a target echo, the target echo being obtained from the Doppler spectrum after removing the estimated topographic echo, a candidate point being a point where electric power is higher than a predetermined noise level;
a determination unit to determine a relation between the positions of candidate points and a plurality of removed points of a spectrum of the topographic echo estimated by the topographic echo estimator and removed from the Doppler spectrum;
an interpolation point extractor to extract as an interpolation point, a point where a spectrum of the target echo is missing by removal of the spectrum of the topographic echo, based on the relation between the positions of the candidate points and the removed points on a frequency axis; and
a target echo reconstruction unit to reconstruct the spectrum of the target echo at a position of the interpolation point.