Modeling Load Modulation
After measuring a NFC tag with a USRP and making a couple of simulations in octave and python, it seems like I was incorrect regarding the point-wise multiplication. As it stands, I believe the best simulation is to do an addition of the carrier wave (13.56 MHz) and the subcarrier wave (847 kHz), with the subcarrier wave's amplitude set at 0.1x the amplitude of the carrier wave.