Device for analyzing radiofrequency signal spectra

An optoelectronic device for extracting features contained in a spectrum of continuous or pulsed, noisy, analog radiofrequency signals, forming an input analog signal,

• the optoelectronic device comprises:
• an input module generating an optical carrier wave and performing a modulation of this optical carrier wave by the input analog signal, by multiplication/mixing, to form a modulated optical signal;
• a network of linear optical cavities optically pumped and coupled by all or some of the modulated optical signal, routed to the network by a light conducting means;
• an optical device for measuring quantities of optical fields, the measured quantities being intensities, amplitudes and/or phases of the optical fields within the coupled linear optical cavities, these optical fields being induced by the modulated optical signal by the input analog signal;
• a calculation module connected to the optical device, performing a linear transformation on the measured quantities of the optical fields, by multiplication with a matrix W and addition of a bias vector b;
• to make it possible to reconstruct and extract targeted features contained in the spectrum of the analog radiofrequency input signal,
• the calculation module having carried out machine learning on noisy analog radiofrequency signals having the same targeted features, in order to determine the parameters W and b.