Magnons are elementary excitations in magnetic materials and undergo
nonlinear multimode scattering processes at large input powers. In experiments
and simulations, we show that the interaction between magnon modes of a
confined magnetic vortex can be harnessed for pattern recognition. We study the
magnetic response to signals comprising sine wave pulses with frequencies
corresponding to radial mode excitations. Three-magnon scattering results in
the excitation of different azimuthal modes, whose amplitudes depend strongly
on the input sequences. We show that recognition rates above 95\% can be
attained for four-symbol sequences using the scattered modes, with strong
performance maintained with the presence of amplitude noise in the inputs