I'm not living in the states. Radio regulations are more relaxed here. There are also open frequencies, like the ubiquitos PMR446. There's a simple reason I want to build one myself: configurability. That's never cheap if going for industrial manufacture.
PMR466, for example, has no range restriction. There are another bunch of frequencies that have this. And there are also the aeromodeling and car-modeling frequencies. What I'm trying to achieve is a basic duplex communication with my bot.
I think this is a good start for a thread where someone with good analogic skills can explain the principles of a single transmitter-receiver pair modulating digital data. Things like bandwidth, frequency, fourier analysis would come in handy here. Ideally, we should come up with a system that can be configured for our needs (frequency regulations, wanted power, performance, etc). I'll be happy to make all the simulations related to this, if someone explains the idea
