Digital Modulation on Pyboard

Experimental simulations of Digital Modulation using the Pyboard’s DAC

Usage

import digimod
from pyb import DAC
#Data Values
stream = (0,1,1,0,1)
#Assign DAC pin X5
dac = DAC(1, bits=12) 
dmod = digimod.Dmodulate(dac)
#Amplitude shift keying
dmod.ask(0.6, 100, stream) #Amplitude(range of 0 - 1), Frequency, Data stream
#Frequency shift keying
dmod.fsk(100, 200, stream) #Space, Mark, Data stream   
#Phase shift keying
dmod.psk(-1, 100, stream) #Offset(BPSK), Frequency, Data stream

Frequency Shift Keying

Amplitude Shift Keying

Phase Shift Keying

References

• Micropython DAC Class

• Advanced Electronic Communications Systems by Wayne Tomasi