Dynamic tracking filter as a low-threshold demodulator in f.m. f.d.m. satellite systems

The paper provides an analysis of the dynamic tracking filter and compares its capability as a low-threshold demodulator with that of the frequency-feedback demodulator. Crossreference is made to the analysis given in a companion paper in order to show the similarities that exist in the equations governing the threshold extension offered by the two forms of low-threshold receiver. Theoretical curves for a 600-channel system are presented which reveal a threshold extension of 4dB.