This email is not a question, but more of a comment. I've been working for about a week on re-purposing a USRP as a digital feedback controller, rather than a software radio. The USRP hardware platform provides you with quite a good starting point for this sort of general purpose digital signal processing application. Nice, fast, and fairly high resolution analog front end. And the total ADC + DAC latency is only 250 ns (by my measurements), which means PID feedback controllers with lock bandwidths up to 1MHz are quite achievable (something that can be quite a pain to do with analog components). And of course a digital feedback controller, being programmable, can be made to do also sorts of fancy "smart" things that are a pain to do in analog (hold or reset the integrator when told to do so, or make the loop gains setpoint-dependent, or your great idea here).
Despite this seeming like a killer app, I haven't really found much discussion of it in this list's archives or on the gnuradio wiki. So I'm mentioning the idea in public, for future mailing list archive searchers. If, at some point, my FPGA code reaches a level of maturity where am I not too embarassed to share it, maybe I will post it somewhere. Or maybe someone on this list will now pipe in that this is all old hat and has already been done. Aviv _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
