Dear Marcus,
Thank you for your advice. A colleague and I tried working with those examples and found the receiver block only produced zeros in simulation. Google led us to this unanswered post: https://lists.gnu.org/archive/html/discuss-gnuradio/2017-03/msg00211.html We were faced with a demonstration deadline and resorted to the packet encoder. For me, this is a completely new and interesting area of study. I am grateful for the gnuradio community and will return to the examples you have suggested. Best regards, Diane Diane Williams Senior Professional Research Assistant, Electrical Engineering University of Colorado Denver ________________________________ From: Müller, Marcus (CEL) <muel...@kit.edu> Sent: Monday, November 12, 2018 5:16:31 AM To: Williams, Diane; discuss-gnuradio@gnu.org Subject: Re: [Discuss-gnuradio] Packet decoder does not output the last packet Dear Ms. Williams, I'm sorry you fell into that trap, but: Packet Encoder/Decoder is known to be buggy. That's why it's in the "deprecated" category. Simply don't use them. You'll find a better example in the GNU Radio examples that were shipped in /usr/share/gnuradio/examples/digital, specifically in /usr/share/gnuradio/examples/digital/packet/packet_loopback_hier.grc and the detailed packet_rx.grc and packet_tx.grc. Best regards, Marcus On Sun, 2018-11-11 at 17:44 +0000, Williams, Diane wrote: > In a very gnuradio simple simulation, flowgraph shown in attached image > simple_udp_simulation, all packets sent to the UDP source are received by the > UDP sink and sent out to a connected UDP socket server program. > > When adding the other processing blocks to the simulation, attached image > udp_packet_encoder_gmsk_simulation, the last packet is received by the UDP > source, but not by the UDP sink. That last packet never is output by the > packet decoder. If I send one extra packet through, a dummy packet of the > same length, then I get my last valid packet. I can do this and handle it in > post-processing, if needed, when later that dummy packet, flows through, but > I would appreciate knowing why the packet decoder hangs onto the last packet. > > I see the packet encoder/decoder deprecation warnings, but have not yet found > a working example for other means of encoding and decoding. > > I am using Ubuntu 18.04 gnuradio packages 3.7.11 > > Thank you. > > > > Diane Williams > Senior Professional Research Assistant, Electrical Engineering > University of Colorado Denver > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
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