Hi Snehasish, Since you're already working with theseus-cores, I assume you've found the rfnoc polyphase channelizer has channel downselection already integrated into rfnoc and gnuradio (brief write up about it here: https://www.theseus-cores.com/2019/12/17/rfnoc-deinterleaving-polyphase-channelizer/). I believe this worked with UHD-3.14 when I tested last December. Wondering if this works for you or if there's other updates you might need?
EJ On Fri, Apr 24, 2020, 12:56 AM Snehasish Kar via USRP-users < usrp-users@lists.ettus.com> wrote: > Hello Jonathon > > I tried building the fractional downsampler again and was successful to > build it in this version of UHD: UHD 4.0.0.rfnoc-devel-409-gec9138eb. Also > there is a channelizer available at > https://github.com/e33b1711/rfnoc-ppchan . But the problem with this > channelizer is, it sends almost 25.6msps samples to the host. Also the > number of packet it sends, creates a overflow in the host even with 10gig > sfp cable. So what I am planning is to make a de-interleaver, which will be > responsible for channel down-selection. Please let me know your thoughts on > this. > > Can you please let me know how to set the packet size on any rfnoc block. > > Regards > Snehasish > ------------------------------ > *From:* Jonathon Pendlum <jonathon.pend...@ettus.com> > *Sent:* Sunday, April 19, 2020 8:58 AM > *To:* Snehasish Kar <snehasish....@live.com> > *Cc:* usrp-users@lists.ettus.com <usrp-users@lists.ettus.com> > *Subject:* Re: [USRP-users] Fractional downsampling in rfnoc > > Hi Snehasish, > > I forgot about that error. I actually made an issue about it on their > repo: https://github.com/SynchronousLabs/rfnoc-SynchronousLabs/issues/2. > Unless they provide an EDIF or their source code, you can only use their > code for simulation. Certainly a disappointing oversight on their part. > > Jonathon > > On Sat, Apr 18, 2020 at 6:21 PM Snehasish Kar <snehasish....@live.com> > wrote: > > Hello Jonathon > > Tried building the fractional downsampler from synchronous labs and have > encountered the following error: > source file was generated for simulation and is not permitted as input to > synthesis > [/home/snehasish/rfnoc-SynchronousLabs/rfnoc/fpga-src/fract_dec_filter.vhd:241995] > > Can you please help me with it. > > Regards > Snehasish > ------------------------------ > *From:* Jonathon Pendlum <jonathon.pend...@ettus.com> > *Sent:* Friday, April 17, 2020 9:22 PM > *To:* Snehasish Kar <snehasish....@live.com> > *Cc:* usrp-users@lists.ettus.com <usrp-users@lists.ettus.com> > *Subject:* Re: [USRP-users] Fractional downsampling in rfnoc > > Hello Snehasish, > > Unfortunately, the standard library of blocks does not have a Fractional > Decimator. Your best bet is to try to use the one made by Synchronous Labs > a few years ago. Their code is on github here: > https://github.com/SynchronousLabs/rfnoc-SynchronousLabs. Since it was > built, RFNoC has had some changes that will need to be fixed, but I think > this is your only option versus writing one from scratch. > > Jonathon > > On Thu, Apr 16, 2020 at 6:35 PM Snehasish Kar via USRP-users < > usrp-users@lists.ettus.com> wrote: > > Hello > > I am trying to use the RFNOC based M/2 channelizer from > https://github.com/theseus-cores/theseus-cores/releases/tag/v1.1.0 . I am > trying to divide 25 MHz spectrum into 124 subchannels each of bandwidth > 200KHz. I am capturing the signal at 200msps and I need to decimate it to > 25.6msps(25MHz/128 channels). Please help me in understanding how this can > be achieved using RFNoC, is there’s any block already defined for > fractional downsampling. > > Thanks & Regards > Snehasish > > Get Outlook for iOS <https://aka.ms/o0ukef> > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >
_______________________________________________ USRP-users mailing list USRP-users@lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
