FM signal approximation

1 · John Cook · Aug. 22, 2021, 5:46 p.m.
FM radio transmits a signal by perturbing (modulating) the frequency of a carrier wave. If the carrier has frequency ω and the signal has frequency q, then the FM signal is cos(ωt + β cos(qt)). To understand the modulated signal, it’s useful to write it as a sum of simple sines and cosines with no […] The post FM signal approximation first appeared on John D. Cook....