ARCTAN differentiated digital demodulator for FM/FSK digital receivers

摘要

In this paper a new FM/FSK digital demodulator based on the digital ARCTAN algorithm, is proposed. The proposed digital FM/FSK demodulator is called ARCTAN Differentiated demodulator. The demodulator is based on quadrature ARCTAN algorithm. Direct division of quadrature signals rejects amplitude modulation components. The proposed demodulator works for both narrow & wide band FM/FSK signals & it is suitable for integration in digital-IF receivers. Behavioral simulation analysis is shown for system validation.