Threshold analysis and design of an FMFB demodulator through quasi‐linear approximation
Yasunori Iwanami, Yoshiaki Nemoto, Risaburo Satos · Electronics and Communications in Japan (Part I Communications) · 1980
Abstract The FMFB (FM feedback) demodulator with the threshold extension capability is now very important in satellite communications. Despite many works on the FMFB, practical design methods of the FMFB seem to have been greatly dependent on experimental results. In this paper, the FMFB model in which both the open‐loop threshold and the feedback threshold are considered is introduced through the quasi‐linear approximation. The theoretical design method is established using this model, and the design examples are given in the case of Enloe's loop filter to compare with Enloe's design method.