Analog Communication #04 | Frequency Modulation (FM) and Phase Modulation (PM) Intuition

Instructor: Dr. Süleyman Burak ÇELİK

In this lesson, we leave amplitude-based modulation behind and introduce the angle modulation family. We keep the carrier amplitude constant and put the message into the angle of the carrier instead. From there, two natural schemes appear: Frequency Modulation (FM), where the message controls the instantaneous frequency, and Phase Modulation (PM), where the message controls the instantaneous phase. Topics covered: - why we move the message from amplitude to angle - instantaneous frequency intuition with a hero animation - FM vs PM, side by side, on the same message - modulation index beta and how it splits FM into narrowband and wideband - Carson rule of thumb for FM bandwidth Timestamps: 0:00 Intro 0:03 From amplitude to angle 0:39 Instantaneous frequency 1:18 FM vs PM 2:01 Narrowband vs wideband FM 2:40 Summary and Carson rule Part of the AcEdumy Analog Communication series.