|Subject:||Re: [Discuss-gnuradio] Packet decoder does not output the last packet|
|Date:||Mon, 12 Nov 2018 17:51:02 +0000|
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.
Senior Professional Research Assistant, Electrical Engineering
University of Colorado Denver
From: Müller, Marcus (CEL) <address@hidden>
Sent: Monday, November 12, 2018 5:16:31 AM
To: Williams, Diane; address@hidden
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
and the detailed packet_rx.grc and packet_tx.grc.
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
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