FMThreshold Performance of theFrequency Demodulator with Feedback

TheFM threshold performance ofthefrequency demodulator with feedback (FMFB)isexperimentally optimized. Rulesofthumbfor thepractical design of theFMFB withlimiter intheloopare proposed. Suchdesign rules provide foroptimumFMFB threshold performance given specifications ofthereceived signal. Equivalences among theFMFB,phase-locked loop, andlimiterdiscriminator offersome additional physical insight intothe threshold-extending mechanismof theFMFB notpresented by previous investigators.