Based on NP(Neyman-Pearson)criterion

a reliability test to evaluate the blind processing results of LFM(Linear Frequency Modulation)signals is proposed in this paper.The reference signals are constructed depending on the certain modulation model in accordance to the identified result at first.By analysis of the parameters differences from the probability distribution characteristics of the modulus of the correlation series under the different hypotheses

the reliability test problem for blind processing results of LFM signals is performed by the proposed statistic and the threshold based on NP criterion.Simulation results show that the proposed method can be used to verify the reliability for blind processing results of LFM signals at low signal-to-noise ratio.