A nonlinear hybrid method for detecting the frequency of unknown weak composite periodic signal
一种精确检测未知弱复合周期信号频率的非线性融合方法

The odd multiple frequency phenomenon emerging in the stochastic resonance was studied, and some new theoretical conclusions was drawn. Based on these conclusions we found the reference frequency which must be set in the chaotic detector. Using the frequency selectivity of chaotic detector, the false frequency existing in the odd multiple frequency was filtered out.