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

[james jordan]

Hi Kyle,

Thanks. my cmake version is too low so i can not build gr-fhss. i try to use fft->max but how to store max result to a gui label?

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From: Kyle A Logue <kyle.a.logue@aero.org>
Sent: Thursday, November 19, 2020 4:05 AM
To: james jordan <james.jordan.999@hotmail.com>; discuss-gnuradio@gnu.org <Discuss-gnuradio@gnu.org>
Subject: Re: how to auto detect peak frequency in QT FFT sink

 

2 things that come to mind:

1. stream -> fft -> argmax
2. in sandia fhss utilities they have an FFT Peak block that does what you want

https://github.com/sandialabs/gr-fhss_utils

Kyle Logue

Senior Engineering Specialist

⚝ The Aerospace Corporation

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From: Discuss-gnuradio <discuss-gnuradio-bounces+kyle.a.logue=aero.org@gnu.org> on behalf of james jordan <james.jordan.999@hotmail.com>
Sent: Monday, November 16, 2020 19:09
To: discuss-gnuradio@gnu.org <Discuss-gnuradio@gnu.org>
Subject: how to auto detect peak frequency in QT FFT sink

 

Hi all,

i want to see the fft of the signal and also want to detect the peak frequency if there is a peak signal.

how to achieve this?