I want to create FPGA firmware for USRP E310 with window function but I get the error I described above. My yaml file is also attached above. I need to do windowing and FFT on the FPGA side. And understand why FFT returns zero values even when it is configured to produce complex data.
[image: image.png] пт, 22 окт. 2021 г. в 17:55, Marcus D. Leech <[email protected]>: > On 2021-10-22 6:05 a.m., Ivan Zahartchuk wrote: > > Yes I am setting fft for magnitudes. On the front side, I am doing a log. I > perfectly understand where infinity comes from. I don’t understand why the > FFT returns 0. But how can I configure the Window? > > > What does uhd_usrp_probe show in the "RFNOC Blocks" section on this device? > > I think the window RFNOC function in GNu Radio takes a list of the window > values as a parameter--you can populate that with any of the window.* > functions > within Gnu Radio. > > > пт, 22 окт. 2021 г. в 01:51, Marcus D. Leech <[email protected]>: > >> On 2021-10-21 6:40 p.m., Ivan Zahartchuk wrote: >> >> >> Hello, I have a problem that when receiving samples from the USRP E310 >> board, after the FFT block at low gain, zero values are received. After that >> I log them and get infinity. I wanted to figure out what the problem is, but >> I have no idea, maybe the Window block will fix the situation. But when >> building my yaml file, I get the error: >> [ERR] 2 Unresolved connection(s) >> [ERR] (window0-out_0 -> fft0-in0) >> [ERR] (fft0-out_0 -> ep1-in_0) >> [INF] (('radio0', 'ctrl_port', 'master'),) >> [INF] (('radio0', 'time_keeper', 'listener'),) >> [INF] (('radio0', 'x300_radio', 'slave'),) >> [INF] (('_device_', 'ctrlport_radio', 'slave'),) >> [INF] (('_device_', 'time_keeper', 'broadcaster'),) >> [INF] (('_device_', 'x300_radio', 'master'),)Please tell me what >> could be the problem and how can I add the Window block to my image? >> >> >> >> _______________________________________________ >> USRP-users mailing list -- [email protected] >> To unsubscribe send an email to [email protected] >> >> Do you have your FFT configured for log output? Because the logarithm of >> zero is undefined. >> >> >> _______________________________________________ >> USRP-users mailing list -- [email protected] >> To unsubscribe send an email to [email protected] >> > >
