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]
<mailto:[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?
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Do you have your FFT configured for log output? Because the
logarithm of zero is undefined.
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