Device and method for FM demodulation with threshold extension

摘要

The present disclosure is directed to an FM demodulator having an extended threshold breakdown point. The FM demodulator uses an arcsin demodulator in combination with a frequency compressive loop to produce a demodulated output signal. The FM demodulator includes three filters that use a coefficient α to determine how the filters behave. The FM demodulator extends the threshold breakdown point of the signal-to-noise ratio of the FM signal beyond traditional levels, allowing the FM demodulator to work at long distances from the broadcasting antenna.