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From: | Ivan Zahartchuk |
Subject: | Re: [USRP-users] Re: Fwd: Adding a Window block to an RFNOC graph |
Date: | Sun, 24 Oct 2021 00:58:39 +0300 |
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.
On 2021-10-22 6:05 a.m., Ivan Zahartchuk wrote:
What does uhd_usrp_probe show in the "RFNOC Blocks" section on this device?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?
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 <patchvonbraun@gmail.com>:
_______________________________________________On 2021-10-21 6:40 p.m., Ivan Zahartchuk wrote:
Do you have your FFT configured for log output? Because the logarithm of zero is undefined.
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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