I'm relatively new to SDR's and I'm trying to determine what sort of BW I need for my laptop to get the best resolution possible for an FMCW system. I have an X310 Ettus with a UBX160 daughtercard which should give about 1 meter of resolution theoretically. Anywhere close to this will probably work just fine for my application. But at the moment I only have a PC capable of a 1 Gig ethernet hookup. The fact is though this will be a pretty short range system, and I expect a pretty narrow range of results (approx bandwidth of a few hundred kHz). Is there a way to mix the echo with the FMCW waveform on board the ettus and just deliver the sub MHz band to the laptop? Or do I really need to shell out all that cash to get the range resolution this unit could deliver?
Sorry this is a newb question, I've been playing around with GNU Radio and uhd a little and I'm leaning towards expecting a "no" on this question - but would love some input from the pros out there. Thanks in advance!