Abstract
With the increasing innovation of network communication technology,
short burst communication has been developed to a certain extent in the
time compression technology, which brings great challenges to the radio
signal blind reception technology .In the blind reception of
non-cooperative signals in short-time burst communication, signal time
domain detection is the premise and key of signal modulation parameter
estimation, signal demodulation, decoding, interpretation, information
acquisition and interference guidance. In this paper, the blind
demodulation method of short-time burst FM-MFSK signal is studied under
the condition of low signal-to-noise ratio. A short-time burst FM-MFSK
blind demodulation method based on STFT is proposed. When SNR is higher
than 2dB, the correct demodulation probability for FM-MFSK signal can
reach 90%.