Instructions for Pulse Position Modulation (PPM)

• Note: Use the input fields to enter the message frequency, sampling frequency, samples per pulse, and pulse width fraction.
• Step 1: Click on 'Generate Message' button to generate the input message signal. The sampling frequency has to be much higher than the message frequency.
• Step 2: Then click on 'Generate PPM Pulse Train' button to generate the PPM Pulse Train signal.
• Step 3: Click on 'Generate PPM Signal' button to generate Pulse Width Modulated (PPM) Signal
• Here, pulse Width Fraction is a fraction of the total interval, and Samples Per Pulse is the total number of samples that span one pulse interval. Pulse Width = round(ppm Width Fraction × Samples Per Pulse) (all in the terms of the number of samples)

Message Frequency in Hz:

Sampling Frequency in Hz:

Samples Per Pulse:

Pulse Width Fraction:

Generate Message

Generate PPM Pulse Train

Generate PPM Signal

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Instructions for Pulse Position Demodulation

• Step 1: To demodulate a Pulse Position Modulated (PPM) signal, a reference pulse generator creates a timing pulse train, which is used to synchronize with the PPM signal. An RS flip-flop ensures accurate pulse generation, while a PWM demodulator measures the width of the PPM pulses and converts this width into a corresponding signal representing the original message
• Step 2: You can demodulate the PPM Signal by clicking on the 'Demodulate PPM Signal' button

Demodulate PPM Signal