FSK Signal Recognition Algorithm Based on Symbols Distribution Characteristics
Zhong Run-tian · Journal of Information Engineering University · 2012
The Frequency Shift Keying(FSK) signal is widely used in short-wave communication,and separating the FSK signal from the Phase Shift Keying(PSK) signal,the Quadrature Amplitude Modulation(QAM) signal and the parallel transmission signal is essential.The key of HF(High Frequency) signal recognition is to reduce negative influence caused by noise and frequency selective fading resulted from multipath transmission.The proposed FSK signal recognition algorithm is based on the distribution characteristics of FSK signal symbols,with the variance of short-time spectrum power as the determinant.Simulation experiments and the real-world test results indicate that this algorithm performs well in intermediate frequency signal processing and can be applied in actual engineering.