Target frequency hopping signal recognition method based on fuzzy comprehensive evaluation

The present invention provides a method for identifying a target signal hopping fuzzy comprehensive judgment based on the specific signal identification process including frequency hopping and two target recognition moiety; collecting narrowband signal receiver, the signal level when the amplitude variation range of the frequency f1 at greater than a1 setting a threshold value θ1, the f1 adjacent frequency f 'signal level of the amplitude variation range at a' greater than the set threshold value theta] 1 and the frequencies f1 and the frequency f 'of the average length difference △ t and the frequency difference △ r is less than setting respective threshold value, it is determined that the frequency hopping signal appears at the frequency f1, and into the target recognition moiety; measuring frequency spectrum bandwidth of an intermediate frequency signal f1 is Be hopping, hopping the carrier frequency and the carrier frequency range Δfe transition rate Te; FM signal is then calculated according to the degree of similarity B be, Δfe and Te; similarity with a target threshold value B set in advance, and determines the target frequency modulated signal corresponding to the result of the comparison. The method of high efficient, highly accurate object recognition.