METHOD FOR PROCESSING SIGNALS ACQUIRED BY ECHO SOUNDING, AND CORRESPONDING COMPUTER PROGRAM AND ECHO SOUNDING DEVICE

摘要

This method (200) for processing ultrasonic signals comprises the following steps: controlling (202) a plurality of emission transducers for L successive emissions of ultrasonic waves; controlling (202) N receiving transducers to receive simultaneously and for a predetermined time, for each successive transmission, N measurement signals; obtaining (204) a matrix (K (t)) of ultrasonic temporal signals of size Lx N, each coefficient K i, j (t) of this matrix representing the measurement signal received by the j-th reception transducer due to at the i-th emission. It further comprises a step (208, 210, 212, 214, 216) of denoise of the matrix (K (t)) of the time signals by elimination (214) of a portion of the singular values and associated singular vectors derived from a singular value decomposition (210) of a matrix (K (?)) of frequency signals obtained by transformation (208) of this matrix (K (t)) of time signals, and by reconstitution (216) of a matrix denoised (Kf (t)) of time signals from singular values and singular vectors not eliminated.