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<p><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Tue, Oct 17, 2017 at 7:45 PM, <a href="mailto:gnorbury@bondcar.com">gnorbury@bondcar.com</a> [op25-dev] <span dir="ltr"><<a href="mailto:op25-dev@yahoogroups.com" target="_blank">op25-dev@yahoogroups.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);">
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<p>Addendum: the filter error is something I saw once before. For some unknown reason your version of gnuradio does not have the fft_filter_ccf() routine, so you are forced to use fir_filter_ccf() instead. Max's code uses the FIR version by default, but I'd changed mine to use FFT because it was much more cpu-efficient for the lightweight hardware such as Rasp PI 3.<br><br>You can edit the p25_demodulator.py file, line 173 and change 'fft' to 'fir' and it should work on your system.</p></div></div></div></div></blockquote><div>Lower CPU usage sounds nice. I'd like to take advantage of it. My installation has the Ubuntu 14.04 gnuradio package (having followed these instructions: <a href="http://op25.osmocom.org/trac/wiki.=/wiki/InstallInstructionsPage#InstallInstructions">http://op25.osmocom.org/trac/wiki.=/wiki/InstallInstructionsPage#InstallInstructions</a>). Is there a different distribution or gnuradio package you recommend to get fft_filter_ccf()?</div><div><br></div><div>Tom</div></div></div></div>
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