I have seen those examples for packet_tx and packet_rx. but the issue here is I want to do contionous transmission and I think, header/payload demux block is for packet transmission, and besides, this block differentiate header and payload , and I want to do is to extract preamble(CCSDS syncbits-32 bits) from the contionous frame and receive only frame bits except syncbits. can you please give suggestion about this?
and yes, It is great to see those examples from which i can get an idea about modulation/demodulation without the use of deprecated blocks.
With Best Regards,
Maitry Raval,
R& D engineer|Azista Industries Pvt Ltd| 079-40605800|www.azistaaerospace.com
----- Original Message -----
From: "Müller, Marcus (CEL)" <mueller@kit.edu>
To: "discuss-gnuradio" <discuss-gnuradio@gnu.org>, "maitry raval" <maitry.raval@azistaaerospace.com>
Sent: Wednesday, January 9, 2019 2:44:09 AM
Subject: Re: [Discuss-gnuradio] Regarding correlate access code-tag block
As indicated, have you worked through the tutorials on
https://tutorials.gnuradio.org?
That's the place where I'd start.
You should drop *all* the blocks that are deprecated. As said, these
are deprecated for a reason (buggy and no-one is willing or able to fix
them – most of the ones you're using are simply broken on a conceptual
level).
Instead of the correlate access block, my guess is that the
header_payload_demux-based examples from gr-
digital/examples/packet/packet_rx.grc and packet_tx.grc and
packet_loopback_hier.grc will make you much happier.
You'll probably find them in
/usr/share/gnuradio/examples/digital/packet.
Best regards,
Marcus
On Tue, 2019-01-08 at 14:10 +0530, Maitry Raval wrote:
> Hello,
> thanks for your guidance.
> I have also attached the grc file, input/output files and python file for your reference. after adding tag debug, still didn't get any output. I have also tried this same in ubuntu 18.04 with GNU radio 3.7.11 version.
> actually because these psk blocks are deprecated, I have tried it with dpsk mod, demod block. But as I wanted to do continuous transmission, I didn't find replaced block for correlate access code-tag block, and the cusom block from gr-satellites are for extracting syncbits.
> I have also tried with simple flow graph by just sream muxing 2 files one with sync bits and other one is payload file and give that output to correlate access code-tag block, but that also didn't work.
>
> It would be grateful, If you guide me on this. I just want to make that sync bits searching and extracting from payload and receive only payload at the output.
>
>
> With Best Regards,
> Maitry Raval,
>
>
> ----- Original Message -----
> From: "Cinaed Simson" <cinaed.simson@gmail.com>
> To: "discuss-gnuradio" <discuss-gnuradio@gnu.org>
> Sent: Tuesday, January 8, 2019 1:47:56 PM
> Subject: Re: [Discuss-gnuradio] Regarding correlate access code-tag block
>
> I broke down and looked at the image.
>
> Note, PSK Demod, Correlate Access Code - Tag, Packet Encoder, and Packet
> Decoder have been depreciated.
>
> And they're usually depreciated because they have problems - and they
> are usually replaced with different blocks which work better and are
> typically more general.
>
> The tutorials are good place to start looking for the replacements.
>
> -- Cinaed
>
>
> On 1/7/19 11:22 PM, Thomas Lavarenne wrote:
> > Oh, it is "File Sink" not "Tagged file sink", didn't see sorry.
> >
> > Le mar. 8 janv. 2019 à 08:20, Thomas Lavarenne
> > <thomas.lavarenne@gmail.com <mailto:thomas.lavarenne@gmail.com>> a écrit :
> >
> >
> >
> > Hi,
> >
> > But, the issue is that correlate access code-tag block is not
> > working and producing tags, so that my output file will come
> > blank. as I am certain that at the output of FEC extended
> > decoder, both the sync bits and payload is available which I
> > have seen by attaching file sink at the output of FEC extended
> > decoder.
> >
> >
> > There is a block "Tag Debug" to see if the tag is generated behind
> > "correlate access code - tag block".
> >
> > On the other hand, the documentation of "Tagged File sink" indicate
> > that the block need the keyword "burst" (with value: True) to
> > trigger the saving of the data.
> >
> > Best regards,
> >
> > Thomas
> >
> > _______________________________________________
> >
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> >
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