Patent ID: 11860318
Assignee: CARPATCHIOT B.V.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A method for estimating a full signal X from a subset B of the full signal X, the method comprising:
a transmitter comprising one or more transmitting elements for emitting ultrasound excitation pressure waves into a propagation medium containing non-uniformities capable of reflecting said excitation pressure waves,
and a receiver for receiving the full signal X, wherein the receiver comprises one or more receiver elements, receiving a plurality of randomly sampled multichannel radio-frequency or in-phase and quadrature signals acquired from the propagation medium

modelling the full signal X as a matrix comprising a plurality of vector signals, each vector signal corresponding to the full signal X incident on a corresponding receiver element, wherein each vector signal comprises a plurality of samples representing the full signal X sampled from a corresponding receiver element, wherein each sample comprises a weighted sum of complex sinusoids, wherein the full signal X is expressed as a matrix product of a first matrix Y and a second matrix D;
updating the second matrix D based on an objective function, wherein the objective function is configured to estimate the second matrix D based on the plurality of randomly sampled signals, to produce an updated second matrix D1;
determining a convergence parameter in dependence upon the evaluated objective function; and
modifying the updated second matrix D1 in dependence upon the convergence parameter, and outputting the estimated full signal X.