A Study of the Threshold Power Requirements of FMFB Receivers

The two-threshold concept of Enloe is systematized by expressing the thresholds in terms of demodulator loop transfer function. The threshold formulas thus developed are then applied using four specific forms of transfer functions. The relative merits of each are displayed graphically for ready comparison. Finally, the FMFB technique is compared on a threshold power basis with other FM demodulation methods.