An arctangent type wideband PM/FM demodulator with improved performance

Abstract

Hagiwara and Nakagawa (1985, 1986) added a jump detector at the output of an arctangent-type baseband FM demodulator in order to transform this intrinsic narrowband demodulator into a wideband one. It is shown in the present work that the performance of the Hagiwara and Nakagawa wideband FM demodulator can be improved, at low input signal-to-noise ratio, by placing the jump detector before, rather than after, the differentiator. An alternative jump detector is also presented.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>