Alternative FIR filter design software is needed

jj1bdx / airspy-fmradion

Software decoder for FM/AM broadcast radio with AirSpy R2 / Mini, Airspy HF+, and RTL-SDR

GNU General Public License v3.0

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Alternative FIR filter design software is needed #36

Open jj1bdx opened 2 years ago

jj1bdx commented 2 years ago

As of February 2022, the Iowa Hills Software web page is gone. Archive.org link: http://web.archive.org/web/20210511075358/http://iowahills.com/8DownloadPage.html

The core software is on GitHub (thx @hayguen) and that is good: https://github.com/hayguen/iowahills_dsp but I have been using the Windows GUI software of Iowa Hills FIR designer, so I need to reorganize the filter design flow.

jj1bdx commented 2 years ago

Displaying the designed filter frequency/phase diagrams can be performed via SciPy (scipy.signal) and matplotlib, as already done in doc/ directory. Issues that need to solve:

Filter design software (scipy.signal can handle this, but displaying the result after tweaking the parameter requires the dedicated tool)
Recording filter design parameters (currently done via Iowa Hills proprietary formats, should be rewritten to use an open format, such as scipy.signal function parameters)

jj1bdx commented 1 year ago

PyFDA seems to be a good alternative of a filter design tool.