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

<?xml version='1.0' encoding='utf-8'?>
<?grc format='1' created='3.7.13'?>
<flow_graph>
<timestamp>Sat Jan 12 13:29:36 2019</timestamp>
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<key>author</key>
<value></value>
</param>
<param>
<key>window_size</key>
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<param>
<key>category</key>
<value>[GRC Hier Blocks]</value>
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<block>
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<key>comment</key>
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<param>
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<key>comment</key>
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<key>mode</key>
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<block>
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<key>comment</key>
<value>Length is 32.</value>
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<block>
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<key>comment</key>
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<key>id</key>
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<key>comment</key>
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<param>
<key>_rotation</key>
<value>0</value>
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<param>
<key>id</key>
<value>samp_rate</value>
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<param>
<key>value</key>
<value>32000</value>
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<block>
<key>blocks_char_to_float</key>
<param>
<key>alias</key>
<value></value>
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<param>
<key>comment</key>
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<param>
<key>affinity</key>
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<param>
<key>_enabled</key>
<value>True</value>
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<key>_coordinate</key>
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<key>_rotation</key>
<value>180</value>
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<param>
<key>id</key>
<value>blocks_char_to_float_0_2_0</value>
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<key>maxoutbuf</key>
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<key>minoutbuf</key>
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<key>vlen</key>
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<block>
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<key>file</key>
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<key>comment</key>
<value>Tag debug=640 on output.</value>
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<key>blocks_repack_bits_bb</key>
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<value>Tag debug=80 on output.</value>
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<key>_enabled</key>
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<key>align_output</key>
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<block>
<key>blocks_stream_to_tagged_stream</key>
<param>
<key>alias</key>
<value></value>
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<param>
<key>comment</key>
<value>Tag debug=80 on output.</value>
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<param>
<key>affinity</key>
<value></value>
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<key>_enabled</key>
<value>1</value>
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<value>(264, 284)</value>
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<key>id</key>
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<param>
<key>vlen</key>
<value>1</value>
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<block>
<key>blocks_tag_debug</key>
<param>
<key>alias</key>
<value></value>
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<param>
<key>comment</key>
<value></value>
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<param>
<key>affinity</key>
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<key>_rotation</key>
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<value>blocks_tag_debug_0</value>
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<param>
<key>type</key>
<value>byte</value>
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<key>filter</key>
<value>""</value>
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<param>
<key>name</key>
<value></value>
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<key>num_inputs</key>
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<param>
<key>vlen</key>
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</param>
</block>
<block>
<key>blocks_throttle</key>
<param>
<key>alias</key>
<value></value>
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<param>
<key>comment</key>
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<key>affinity</key>
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<key>_enabled</key>
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<key>_rotation</key>
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<param>
<key>id</key>
<value>blocks_throttle_0</value>
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<param>
<key>ignoretag</key>
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<param>
<key>maxoutbuf</key>
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<param>
<key>minoutbuf</key>
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<param>
<key>samples_per_second</key>
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<param>
<key>type</key>
<value>byte</value>
</param>
<param>
<key>vlen</key>
<value>1</value>
</param>
</block>
<block>
<key>blocks_vector_source_x</key>
<param>
<key>alias</key>
<value></value>
</param>
<param>
<key>comment</key>
<value></value>
</param>
<param>
<key>affinity</key>
<value></value>
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<param>
<key>_enabled</key>
<value>True</value>
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<param>
<key>_coordinate</key>
<value>(40, 276)</value>
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<param>
<key>_rotation</key>
<value>0</value>
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<param>
<key>id</key>
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<param>
<key>maxoutbuf</key>
<value>0</value>
</param>
<param>
<key>minoutbuf</key>
<value>0</value>
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<param>
<key>type</key>
<value>byte</value>
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<param>
<key>repeat</key>
<value>True</value>
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<param>
<key>tags</key>
<value>[]</value>
</param>
<param>
<key>vlen</key>
<value>1</value>
</param>
<param>
<key>vector</key>
<value>access_code+pattern</value>
</param>
</block>
<block>
<key>digital_map_bb</key>
<param>
<key>alias</key>
<value></value>
</param>
<param>
<key>comment</key>
<value></value>
</param>
<param>
<key>affinity</key>
<value></value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>_coordinate</key>
<value>(1088, 292)</value>
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<param>
<key>_rotation</key>
<value>0</value>
</param>
<param>
<key>id</key>
<value>digital_map_bb_0</value>
</param>
<param>
<key>map</key>
<value>-1,1</value>
</param>
<param>
<key>maxoutbuf</key>
<value>0</value>
</param>
<param>
<key>minoutbuf</key>
<value>0</value>
</param>
</block>
<block>
<key>fec_extended_tagged_decoder</key>
<param>
<key>ann</key>
<value>None</value>
</param>
<param>
<key>alias</key>
<value></value>
</param>
<param>
<key>comment</key>
<value>Tag debug=640 on output</value>
</param>
<param>
<key>affinity</key>
<value></value>
</param>
<param>
<key>decoder_list</key>
<value>CCSDS_decoder</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>_coordinate</key>
<value>(760, 400)</value>
</param>
<param>
<key>_rotation</key>
<value>180</value>
</param>
<param>
<key>id</key>
<value>fec_extended_tagged_decoder_0</value>
</param>
<param>
<key>lentagname</key>
<value>packet_len</value>
</param>
<param>
<key>mtu</key>
<value>1500</value>
</param>
<param>
<key>maxoutbuf</key>
<value>0</value>
</param>
<param>
<key>minoutbuf</key>
<value>0</value>
</param>
<param>
<key>puncpat</key>
<value>'11'</value>
</param>
<param>
<key>value</key>
<value>fec_extended_decoder</value>
</param>
</block>
<block>
<key>fec_extended_tagged_encoder</key>
<param>
<key>alias</key>
<value></value>
</param>
<param>
<key>comment</key>
<value>Tag debug=1280 on output</value>
</param>
<param>
<key>affinity</key>
<value></value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>encoder_list</key>
<value>CCSDS_encoder</value>
</param>
<param>
<key>_coordinate</key>
<value>(832, 272)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
<param>
<key>id</key>
<value>fec_extended_tagged_encoder_0</value>
</param>
<param>
<key>lentagname</key>
<value>packet_len</value>
</param>
<param>
<key>mtu</key>
<value>1500</value>
</param>
<param>
<key>maxoutbuf</key>
<value>0</value>
</param>
<param>
<key>minoutbuf</key>
<value>0</value>
</param>
<param>
<key>puncpat</key>
<value>'11'</value>
</param>
</block>
<block>
<key>parameter</key>
<param>
<key>alias</key>
<value></value>
</param>
<param>
<key>comment</key>
<value>80*8*2=1280</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>_coordinate</key>
<value>(304, 8)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
<param>
<key>id</key>
<value>frame_bits</value>
</param>
<param>
<key>label</key>
<value>Frame Bits</value>
</param>
<param>
<key>short_id</key>
<value></value>
</param>
<param>
<key>hide</key>
<value>none</value>
</param>
<param>
<key>type</key>
<value>intx</value>
</param>
<param>
<key>value</key>
<value>1280</value>
</param>
</block>
<block>
<key>parameter</key>
<param>
<key>alias</key>
<value></value>
</param>
<param>
<key>comment</key>
<value>32+48=80</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>_coordinate</key>
<value>(184, 8)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
<param>
<key>id</key>
<value>frame_size</value>
</param>
<param>
<key>label</key>
<value>Frame Size</value>
</param>
<param>
<key>short_id</key>
<value></value>
</param>
<param>
<key>hide</key>
<value>none</value>
</param>
<param>
<key>type</key>
<value>intx</value>
</param>
<param>
<key>value</key>
<value>80</value>
</param>
</block>
<connection>
<source_block_id>blocks_char_to_float_0_2_0</source_block_id>
<sink_block_id>fec_extended_tagged_decoder_0</sink_block_id>
<source_key>0</source_key>
<sink_key>0</sink_key>
</connection>
<connection>
<source_block_id>blocks_repack_bits_bb_0</source_block_id>
<sink_block_id>fec_extended_tagged_encoder_0</sink_block_id>
<source_key>0</source_key>
<sink_key>0</sink_key>
</connection>
<connection>
<source_block_id>blocks_repack_bits_bb_0_0</source_block_id>
<sink_block_id>blocks_file_sink_0</sink_block_id>
<source_key>0</source_key>
<sink_key>0</sink_key>
</connection>
<connection>
<source_block_id>blocks_repack_bits_bb_0_0</source_block_id>
<sink_block_id>blocks_tag_debug_0</sink_block_id>
<source_key>0</source_key>
<sink_key>0</sink_key>
</connection>
<connection>
<source_block_id>blocks_stream_to_tagged_stream_0</source_block_id>
<sink_block_id>blocks_throttle_0</sink_block_id>
<source_key>0</source_key>
<sink_key>0</sink_key>
</connection>
<connection>
<source_block_id>blocks_throttle_0</source_block_id>
<sink_block_id>blocks_repack_bits_bb_0</sink_block_id>
<source_key>0</source_key>
<sink_key>0</sink_key>
</connection>
<connection>
<source_block_id>blocks_vector_source_x_0</source_block_id>
<sink_block_id>blocks_stream_to_tagged_stream_0</sink_block_id>
<source_key>0</source_key>
<sink_key>0</sink_key>
</connection>
<connection>
<source_block_id>digital_map_bb_0</source_block_id>
<sink_block_id>blocks_char_to_float_0_2_0</sink_block_id>
<source_key>0</source_key>
<sink_key>0</sink_key>
</connection>
<connection>
<source_block_id>fec_extended_tagged_decoder_0</source_block_id>
<sink_block_id>blocks_repack_bits_bb_0_0</sink_block_id>
<source_key>0</source_key>
<sink_key>0</sink_key>
</connection>
<connection>
<source_block_id>fec_extended_tagged_encoder_0</source_block_id>
<sink_block_id>digital_map_bb_0</sink_block_id>
<source_key>0</source_key>
<sink_key>0</sink_key>
</connection>
</flow_graph>
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" <cinaed.simson@gmail.com>
> To: "Maitry Raval" <maitry.raval@azistaaerospace.com>
> Cc: "discuss-gnuradio" <discuss-gnuradio@gnu.org>
> 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" <cinaed.simson@gmail.com>
>> To: "discuss-gnuradio" <discuss-gnuradio@gnu.org>
>> Cc: "Maitry Raval" <maitry.raval@azistaaerospace.com>
>> 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" <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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>>>> Discuss-gnuradio@gnu.org <mailto:Discuss-gnuradio@gnu.org>
>>>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>>>>
>>>>
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>>>>
>>>
>>>
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>>>
>>>
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>>>
>> .
>>
>