- I want to at least detect devices that are using 2G, UMTS or LTE.
- What would be the basic stuff, in terms of hardware and software, for that? I assume gnuradio or some Universal Software Radio Peripheral (USRP) would be a starting point for the software.
- But what hardware would you need to capture and emit signals?
- Could it at least detect the presence, if number or some form of ID of the phone are too hard to get.
- Could activity of cell-phones be classified (is it calling, getting data)?
software defined radio