I have an embedded electronics project in mind, but will use a different example to explain what I wonder.
Say we have to PCs, each with a sound card which can sample up to 44kHz. How do I get those to talk to each other over radio? It helps if the antenna need not be huge, but low parts count and low price is most important. Can the audio signal be modulated in some simple way? Are there ICs which already does the major part?
I have a decent understanding of digital logic, but when it comes to analog things I need a lot of advice.
Assume the PCs can do a certain amount of processing of the signal. The sound card is stereo, could that be used for something? Like use the left channel for data, and the right channel for some kind of modulation shift?