Re: [Discuss-gnuradio] Regarding correlate access code-tag block

[Cinaed Simson]

On 1/10/19 2:47 AM, Maitry Raval wrote:
> Hello,
> 
> Thanks for your time!
> 
> It works completely fine, now I understand that we have to give tagged stream 
> at the input of encoder.

Sorry, I didn't mean to imply you needed the stream to tagged stream
block to make it work.

I just put in at the beginning so I could use the tag debug as a brute
force search to find out what was blocking the flow.

There are two sequential tag blocks - the correlate correlate access
code-tag from gnuradio and a block from gr-satellites - I would guess
that is all you need.

Select "pass thru" on the stream to tagged stream block - it should
still work.

-- Cinaed


> 
> 
> With Best Regards,
> Maitry Raval,
> R& D engineer|Azista Industries Pvt Ltd| 079-40605800|www.azistaaerospace.com
> 
> ----- Original Message -----
> From: "Cinaed Simson" <address@hidden>
> To: "discuss-gnuradio" <address@hidden>
> Cc: "Maitry Raval" <address@hidden>
> Sent: Thursday, January 10, 2019 1:21:34 PM
> Subject: Re: [Discuss-gnuradio] Regarding correlate access code-tag block
> 
> Hi Mailry - I was able to get it run.
> 
> I used the "correlate access" block from gnuradio - my installation of
> gnuradio didn't like the block in your flowgraph.
> 
> And then I had to install the python module "construct" in order to get
> the flowgraph to run.
> 
> In order to get the flowchart to work - at least in the sense of filling
> up the output.txt file - I added a "Stream to Tagged Stream" block and
> define a consist tag to get the Tag Debug block to work.
> 
> Also, I had to remove the "unpack" block before the PSK modulation,
> added a "Unpack K=1" block just after the PSK demodulation - and I set
> "Generate Options" to "No Gui" in the Options block.
> 
> -- Cinaed
> 
> 
> 
> On 1/8/19 12:40 AM, 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" <address@hidden>
>> To: "discuss-gnuradio" <address@hidden>
>> 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
>>> <address@hidden <mailto:address@hidden>> 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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>>
>>
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