Looks like I only replied to Michael and not the list... The example is included with gnuradio is available on the gnuradio github. https://github.com/gnuradio/gnuradio/tree/master/gr-digital/examples/packet
>From my understanding of this particular example, OFDM carrier allocation and >all the good stuff that comes along with OFDM is not part of the example. It >just performs constellation encoding, header/payload muxing, correlation >estimation, carrier frequency recovery w/ costas loop, and header / payload >demuxing. Thanks, Alex. ------ Alex Roberts Research Engineer Applied Power Division (11) Southwest Research Institute Office: (210) 522-6014 | Pager (210) 513-1672 ________________________________ From: Roberts, Alex S. Sent: Wednesday, March 28, 2018 8:56 AM To: Michael Dickens Subject: RE: [Discuss-gnuradio] Meaning of header_payload_demux0 - Parser returned #f The example is included with gnuradio is available on the gnuradio github. https://github.com/gnuradio/gnuradio/tree/master/gr-digital/examples/packet >From my understanding of this particular example, OFDM carrier allocation and >all the good stuff that comes along with OFDM is not part of the example. It >just performs constellation encoding, header/payload muxing, correlation >estimation, carrier frequency recovery w/ costas loop, and header / payload >demuxing. Thanks, Alex. From: Michael Dickens [mailto:michael.dick...@ettus.com] Sent: Wednesday, March 28, 2018 8:44 AM To: Roberts, Alex S.; discuss-gnuradio@gnu.org Subject: Re: [Discuss-gnuradio] Meaning of header_payload_demux0 - Parser returned #f Hi Alex - If you want to share your GRC file with me (privately) and/or the list, we'll see what we can figure out. Guessing it's an OFDM sync issue, since GR's OFDM implementation is for async messages, and those are on a message by message basis. - MLD On Tue, Mar 27, 2018, at 8:50 PM, Roberts, Alex S. wrote: Michael that provides insight into the error, unfortunately it does not explain the behavior of the example. The example uses the tx_packet and rx_packet hierarchical blocks. The output of the tx is routed to the input of the rx. I bypassed the example channel model and I'm not using hardware at the moment, so I would expect the example would have little issue with poor SNR and would maintain sync.
packet_loopback_hier.grc
Description: packet_loopback_hier.grc
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