In order to solve the problem of low recognition of signal modulation in low SNR condition
TFC-KNN algorithm was proposed.It was based on Higher-Order Cumulants and K-NN Nearest Neighbor algorithm. According to the algorithm
the Higher-Order Cumulants is introduced on the basis of time frequency analysis
and the signal will be classified using K-NN Nearest Neighbor algorithm.The feature parameter
presented in the algorithm
can effectively restrain the additive white Gaussian noise.Simulation results show that the recognition rate for this recognition structure and algorithm can reach 96% for different modulated signal when the signal noise ratio is not less than 5 dB.