2 ms·
The thing is this is all really not complicated, but unfortunately the way we (at least I) are being taught complex numbers is terrible. They essentially fall o
by cycomanic 6y ago
The thing is this is all really not complicated, but unfortunately the way we (at least I) are being taught complex numbers is terrible. They essentially fall out of thin air without much explanation and sure the concept as a mathematical construct is easy enough to understand, but that doesn't really explain the why and the elegance of what you can do with them.
I really only understood this when I started doing communications (and that was after doing a PhD in physics mind you).
- vvanders 6y agoYeah, you can actually simulate a good chunk of this with just trig, I actually simulated a mixer[1] in python and was able to work out how I/Q got mixed into the baseband, it was a ton of fun. Once you've got the data in I/Q lots of the modulation modes just fall out really easily(I recommend reading about AM, FM and BPSK/QPSK as a starting point which then you can generalize into QAM). [1] https://en.wikipedia.org/wiki/Frequency_mixer#Diode https://en.wikipedia.org/wiki/Frequency_mixer#Diode