SmartGattLib VS gnuradio

SmartGattLib

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gnuradio

• Upsampling in Gnuradio is necessary?
  1 project | /r/sdr | 11 Aug 2023

  In gr-dtv transmitter examples for Gnuradio, I see some times people use a resampler block before the RF hardware sink. Say our sampling rate is ~9.14Msps which satisfies the Nyquist criterion because our samples are complex numbers.

• Capturing FM using SDR
  1 project | /r/GNURadio | 27 Jun 2023

  2.1. Thanks for that tip, I forgot that I was able to check the source code of the WBFM Receive block. As you have said, there are mostly the same. There are some differences between how values are picked. The WBFM Receive block would be a synonym of Quadrature demod => Fir Filter (decimation => Low pass filter) => FM Deemphasis. 2.3. My question there is why 10 and not 20 or 100. I understand that the idea is to reduce the sample rate asap, but what I don't understand is why those values were picked and how can I understand what would be the "correct" or "best" value. 2.4. I'm not fully understanding what you said. If I check the WB FM recieve source code the values that are supplied as the cutoff freq and transition width of the Low pass filter differ from the one of the example. The webfm would apply a sample rate / decimation / 2 - sample rate / decimation / 32 as a cutoff freq and a sample rate / decimation / 32 as a transition transition width. Calculating those values would end up in different that the ones supplied in this second example. Again, is there a rule of thumb to pick these values?.

• Hello everyone! I would like to install and run GNU Radio version 3.7.4 in order to follow along with The HackRF GNU Radio tutorial on greatscottgadgets.com/sdr/ but I can’t find prior releases to install. Can anyone help?
  1 project | /r/GNURadio | 3 Jun 2023
• Multi band gfsk demodulation with Nooelec RTL-SDR v5 SDR and gnu radio
  1 project | /r/RTLSDR | 20 May 2023

  Gaussian filter is used only on the tx side, so specifying bt in the receiver makes no sense. Take a look at gfsk mod/demod blocks implementation: https://github.com/gnuradio/gnuradio/blob/master/gr-digital/python/digital/gfsk.py

• What would you rewrite in Rust?
  44 projects | /r/rust | 11 Feb 2023

  GNU Radio

• Is there a way to delay a signal in time-domain?
  1 project | /r/DSP | 10 Feb 2023

  Here's the filter coefficients used for the GNU-Radio interpolator block to get you started. This is a 7th order interpolator (i.e., 8 FIR taps) with very good performance. Each "row" of the array sets the delay in steps of sample_time / 128.

• My grandpa is a huge HAM radio fan, so I showed him GNU Radio. Got this text the day he got back home.
  2 projects | /r/linuxmasterrace | 4 Jan 2023

  From their README: “open-source software development toolkit that provides signal processing blocks to implement software radios.” https://github.com/gnuradio/gnuradio

• The future is now ... again
  1 project | /r/GNURadio | 22 Sep 2022
• GNU Radio
  1 project | /r/hackernews | 15 Jan 2022
• GNU Radio – the Free and Open Software Radio Ecosystem
  1 project | /r/CKsTechNews | 15 Jan 2022