Instructions for Frequency Modulation (FM)

Note: Use the sliders to input the message frequency, carrier frequency, and Kf (frequency sensitivity).
Step 1: Click on the "Generate Message" button to create the input message signal based on the selected frequency.
Step 2: Click on the "Generate Carrier" button to generate the carrier signal. The carrier frequency must be higher than the message frequency. You can adjust both using the sliders.
Step 3: Click on the "Generate Frequency Modulated Signal" button to produce the FM signal.
Step 4: Click the "Show Frequency Spectrums" button to visualize the frequency spectrum of the FM signal.
Tip: β represents the frequency modulation index, given by β = kf × Am / fm, where Am is the amplitude of the message signal (fixed to 1), fm is the message frequency, and kf is the frequency sensitivity.

1Hz

Step 1:

10Hz

Step 2:

Kf (frequency sensitivity):

Step 3:

Step 4:

Instructions for Frequency Demodulation

Step 1: LPF's Cutoff frequency works in accordance with the Message frequency
Step 2: You can Demodulate the FM Signal clicking on the 'Perform FM Demodulation' button
Step 3: Click on the 'Show Frequency Spectrums' button above to see spectra of the message, FM modulated and demodulated signal. The frequency spectra is shown for a modulation index of 1