Convert pulses into sine

Any idea how to convert pulses to sine wave? I'm having pulses which I get via PWM technique and now I want to convert it to sine, because I need to know is phase shifted by 120 degrees

Answer 1

[Sabin]

This can be done using a Butterworth filter. More insights about the Butterworth filter can be found in Signal Processing Toolbox:

https://www.mathworks.com/help/signal/ref/butter.html