RADIO SIGNAL RECOGNITION METHOD Russian patent published in 2011 - IPC G06K9/00 

FIELD: information technology.

SUBSTANCE: standard radio signals are first given, discretised, quantised and the sequence of quantised readings of standard radio signals undergoes frame wavelet transformation. A radio signal attribute vector is then generated from the wavelet coefficients of the standard radio signals. The recognised radio signal is then received and its attribute vector is then generated similarly to that of standard radio signals. The received radio signal is then identified by comparing its attributes with attributes of standard radio signals. Before generating the attribute vector from wavelet coefficients, maximum coefficients are separately picked up at the outputs of the second and third filters, onto which the remaining wavelet coefficients are respectively standardised separately for the second and third filters. The average power values of the wavelet coefficients are then calculated, which are selected as radio signal attribute vector elements. The received radio signal is identified through successive modulo subtraction of elements of its attribute vector from attribute vectors of each of the standard radio signals, and the recognised radio signal is the incident standard radio signal, the difference between attribute vectors of which is minimal.

EFFECT: high efficiency while maintaining the required probability of correct recognition.

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