Study On FSK Weak Signal Detection Method By Chaotic Oscillator

According to the characteristics of 2FSK signal and 2PSK signal, a new method based on weak signal detection by Duffing chaotic oscillator to detect 2FSK signal and 2PSK signal is presented. 2FSK and 2PSK weak signal detection using chaotic oscillator is realized by simulation. The influence of the parameters on the system character is demonstrated by the large of charts and tables, and the minimum detection threshold of the proposed method is given. The effect of the parameters of chaotic oscillator and 2FSK signal on symbol error rate is studied; the simulation experimental results show that the chaotic oscillator method has strong anti-jamming. At last, the comparison between chaotic oscillator method and traditional demodulation method is given; the research makes known that the chaotic oscillator method has obvious advantage in 2FSK and 2PSK weak signal detection.