A method for determining a velocity of objects in a medium comprises inputting a wave into a wave interference network, generating a first and at least one second point spread function (PSF), outputting at least one propagation mode of the wave to the medium for illuminating the medium therewith, collecting a scattered signal from the medium, acquiring a first signal having the first PSF associated therewith and at least one second signal having the at least one second PSF associated therewith, determining a first correlation of at least one of the first signal and the at least one second signal, and a second correlation of at least one of the first signal and the at least one second signal, determining a ratio between the first correlation and the second correlation, and determining the velocity of the one or more objects in the medium based on the ratio.

A method for determining a velocity of objects in a medium comprises inputting a wave into a wave interference network, generating a first and at least one second point spread function (PSF), outputting at least one propagation mode of the wave to the medium for illuminating the medium therewith, collecting a scattered signal from the medium, acquiring a first signal having the first PSF associated therewith and at least one second signal having the at least one second PSF associated therewith, determining a first correlation of at least one of the first signal and the at least one second signal, and a second correlation of at least one of the first signal and the at least one second signal, determining a ratio between the first correlation and the second correlation, and determining the velocity of the one or more objects in the medium based on the ratio.