Re: how to auto detect peak frequency in QT FFT sink

[Kyle A Logue]

this might depend on how you install it

I see you are using and /opt/ prefix. I just install it with `pybombs install gr-fhss_utils` and it works.

Maybe you are missing a dependency?

FYI the FFT peak block you want is a simple hier block you could make without installing anything. Look at this file.

Kyle

---

From: Discuss-gnuradio <discuss-gnuradio-bounces+kyle.a.logue=aero.org@gnu.org> on behalf of Cinaed Simson <cinaed.simson@gmail.com>
Sent: Tuesday, December 1, 2020 13:31
To: discuss-gnuradio@gnu.org <discuss-gnuradio@gnu.org>
Subject: Re: how to auto detect peak frequency in QT FFT sink

 

Hi Kyle - after I build gr-fhss_utils and run the tests, all 3 tests fail.

Do the tests work?

I did a pull but it was up to date.

I'm running gnuradio 3.8.2.0 on Debian 10 or buster.

-- Cinaed

Running tests...
Test project /opt/gnuradio/src/gr-oot/gr-fhss_utils/build
    Start 1: qa_cf_estimate
1/3 Test #1: qa_cf_estimate ...................***Failed    0.34 sec
    Start 2: qa_fft_burst_tagger
2/3 Test #2: qa_fft_burst_tagger ..............***Failed    0.32 sec
    Start 3: qa_tagged_burst_to_pdu
3/3 Test #3: qa_tagged_burst_to_pdu ...........***Failed    0.32 sec

0% tests passed, 3 tests failed out of 3

Total Test time (real) =   0.99 sec

The following tests FAILED:
      1 - qa_cf_estimate (Failed)
      2 - qa_fft_burst_tagger (Failed)
      3 - qa_tagged_burst_to_pdu (Failed)
Errors while running CTest
make: *** [Makefile:86: test] Error 8

On 12/1/20 8:48 AM, Kyle A Logue wrote:

just did a quick test, couldn't be simpler

max_i reports the argmax of the fft, with wrapping

So in the above example:

• 1 kHz -> 1
• 5.5 kHz -> 5
• -1 kHz -> 31
• -8 KHz -> 24

increase from 32 to increase resolution

Kyle

---

From: james jordan <james.jordan.999@hotmail.com>
Sent: Monday, November 30, 2020 18:37
To: Kyle A Logue <kyle.a.logue@aero.org>; discuss-gnuradio@gnu.org <Discuss-gnuradio@gnu.org>
Subject: Re: how to auto detect peak frequency in QT FFT sink