Hello folks. I am currently looking at using the USRP for interaction with RFID tags. The crux of the problem is that I need to transmit a continuous carrier wave to power the tag, but I also need very low latency with respect to receiving a tag signal and responding to that signal (< 500us. Not going to happen, but the closer the better). Currently, I am transmitting the carrier from the host which eats up half of my USB bandwidth and keeps the TX buffers full, both of which are killing my latency.
My question is, would it be possible to modify the FPGA so that the default behavior is to transmit the carrier until it receives buffers for transmit? This should reduce the latency by using the USB half duplex, keeping the TX buffers empty which allows for burst transmits, and also by freeing up some computes which are now burned sending out "1's". To further complicate the problem, I've very little experience working with FPGAs and verilog. So, a caveat to the above question is that this not only needs to be possible, it needs to be relatively straight forward as well. Any advice as to the feasibility of this endeavor would be greatly appreciated. If it seems reasonable, pointers as to what would be involved, where I would need to look, etc. would also be helpful. Thanks. Michael Buettner _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio