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

[Maitry Raval]

Thanks for your guidance and support.
I will try to make flow graph with the blocks as per examples given by you.

With Best Regards,
Maitry Raval,

----- Original Message -----
From: "Cinaed Simson" <address@hidden>
To: "Maitry Raval" <address@hidden>
Cc: "discuss-gnuradio" <address@hidden>
Sent: Tuesday, January 15, 2019 10:25:52 AM
Subject: Re: [Discuss-gnuradio] Regarding correlate access code-tag block

Actually, with the Default Header Format file, and the Protocol
Formatter, use correlation-access tagged block was a piece of cake.

Also, here's an example of bspk using constellations - if you haven't
found already.

-- Cinaed

On 1/14/19 12:39 PM, Cinaed Simson wrote:
> As you may have already discovered, I was wrong about unpacking bits for
> fec.
> 
> Actually, I have no idea on how I'm getting the results I'm getting
> using my modifications of your flowgraph - those depreciated blocks
> definitely have strange problems. If I insert the unpack k=8 block as
> required for fec the flowgraph doesn't work.
> 
> I ran into a problem testing fec - I modified your sources and I didn't
> have enough frame bits. So I set the frame bits to exactly what I need.
> 
> And I can't get a simple correlation access tagged test working - even
> with a tag gate. The only way it works is if remove the access code -
> which defeats the purpose.
> 
> So I'm go to have to evolve and get the protocol formatter working.
> 
> Also, you don't have to use the rx and tx packet blocks - you can use
> the replacements for the PSK mod/demod blocks - the constellation
> mod/demod blocks - you probably shouldn't use any depreciated blocks.
> 
> -- Cinaed
> 
> 
> On 1/10/19 10:01 PM, Maitry Raval wrote:
>> Hello,
>>
>> Ok, One more query, what is the purpose of the block unpack k=1 bit at 
>> output of PSK demod block, because the meaning of unpack k=1 means byte to 
>> byte conversion, right?
>>
>> With Best Regards,
>> Maitry Raval,
>>
>> ----- Original Message -----
>> From: "Cinaed Simson" <address@hidden>
>> To: "Maitry Raval" <address@hidden>
>> Cc: "discuss-gnuradio" <address@hidden>
>> Sent: Friday, January 11, 2019 2:11:54 AM
>> Subject: Re: [Discuss-gnuradio] Regarding correlate access code-tag block
>>
>> 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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