Demodulation of AM-FM Signals in Noise Using Multiband Energy Operators
with time-varying amplitude a and instantaneous frequency o i = 4 , using the operator Y(s) = ($2-ss' developed by Teager [I] and Kaiser [2], shown to be highly effective for detecting AM-FM modulations [31. For signals of the form (l), "(3) 5 u 2 q 2 and Y(i = a 2 0 t , with small approximation error under realistic conditions [31. This motivates the energy separaiwn algorithm @SA): SO) = a(t) cos[~i ) l , (1)