Digital FM-Tutorial

Abstract

A review of the state of knowledge of digital FM techniques is undertaken. The digital FM signal and its spectral properties are first discussed. We then turn to the analysis of discrimination detection and review a recently proposed phenomenological model from which the error causing mechanism can be understood. We use this model to derive estimates of error-rate as a function of pertinent system parameters. The results obtained for practically instrumented systems are then compared with the ideal. The paper concludes with a discussion of some computer-aided analysis capable of predicting the performance of digital FM systems operating over the dispersive gaussian channel.